Helmi, prof. dr. Amina
Amina Helmi (1970) is hoogleraar Dynamica, structuur en vorming van de Melkweg. Helmi schreef een baanbrekend proefschrift (waarvoor ze de Christiaan Huygens-prijs 2004 ontving) waarin de geschiedenis en het ontstaan van onze Melkweg in een nieuw licht werden geplaatst: ons Melkwegstelstel is waarschijnlijk geleidelijk aangegroeid met kleinere sterrenstelsels. Helmi spoort die aparte sterrenstelsels ('fossielen') op en bedrijft dus een soort astro-archeologie; ze gebruikt de informatie van sterfossielen om het ontstaan van de Melkweg te reconstrueren.
Spinozalaureaat 2019 - Amina Helmi
Nieuwe inzichten - Formatie van de Melkweg
“Deze dag zet de sterrenkunde in een heel ander daglicht”
Helmi over het einde van de wereld
Helmi heeft een aantal gerenommeerde subsidies ontvangen, zoals een VIDI van NWO in 2003 en, in 2009, een ERC Starting Grant van de EU. Ze is actief in allerlei internationale netwerken en is in 2017 benoemd tot lid van de Koninklijke Nederlandse Akademie van Wetenschappen. Een team met Amina Helmi bracht in augustus 2014 in Science voor het eerst de ruimtelijke verdeling van de onbekende materie tussen de sterren in beeld. Helmi is nauw betrokken bij de in 2013 gelanceerde GAIA-telescoop die met zeer preciese metingen het Melkwegstelsel in kaart brengt. In 2015 ontving ze voor haar onderzoek hiernaar een VICI-subsidie en in 2017 opnieuw een NWO-subsidie. In 2018 kreeg ze met haar onderzoeksgroep als een van de eersten de gelegenheid om de tweede set gegevens van de GAIA-telescoop te bestuderen. Helmi ontdekte daarmee dat de Melkweg tien miljard jaar geleden een groot stelsel heeft opgeslokt.
Voor haar baanbrekende onderzoek ontving Helmi in 2019 de Spinozapremie, de 'Nederlandse Nobelprijs'.
Eerder in het nieuws
-
Amina Helmi en haar team opnieuw betrokken bij nieuwste data Release van Gaia-missie RUG-nieuws, juni 2022
-
Spinozapremie 2019 voor astronome Amina Helmi RUG-nieuws, juni 2019
-
'Smoking gun'. Amina Helmi wist dat ze moest wachten op Gaia Broerstraat 5, december 2019
-
Sterrenkundigen vinden de reus die de jonge Melkweg zijn vorm gaf RUG-nieuws, oktober 2018
-
Klein sterrenstelsel maakte 'slakkenhuis' in onze hoek van Melkweg RUG-nieuws, september 2018
-
Nieuwe data Gaia telescoop toont fusies van de Melkweg RUG Science Linx, juni 2018
-
Revolutie in de sterrenkunde door nieuwe metingen RUG-nieuws, april 2018
-
Helmi benoemd tot lid KNAW RUG-nieuws, mei 2017
-
Astronomen watertanden bij ‘doos vol bonbons’ RUG Science Linx, januari 2017
-
Doldwaze Datadagen voor sterrenkundigen RUG Science Linx, september 2016
-
Groningse sterrenkundige Amina Helmi mede-ontdekker van nieuwe sterrenstroom in de Melkweg RUG-nieuws, 2 februari 2011
Contact en meer informatie
Publicaties
2024
Koop,
O., Antoja, T., Helmi, A., Callingham, T.
M., & Laporte, C. F. P. (2024). Assessing the
robustness of the Galactic rotation curve inferred from the Jeans
equations using Gaia DR3 and cosmological simulations.
Astronomy & Astrophysics, 692,
Article A50. https://doi.org/10.1051/0004-6361/202450911
Gallart,
C., Surot, F., Cassisi, S., Fernández-Alvar, E., Mirabal, D.,
Rivero, A., Ruiz-Lara, T., Santos-Torres, J., Aznar-Menargues, G.,
Battaglia, G., Queiroz, A. B., Monelli, M., Vasiliev, E.,
Chiappini, C., Helmi, A., Hill, V., Massari, D., &
Thomas, G. F. (2024). Chronology of our Galaxy from Gaia
colour-magnitude diagram fitting (ChronoGal): I. the formation and
evolution of the thin disc from the Gaia Catalogue of Nearby
Stars. Astronomy & Astrophysics,
687, Article A168. https://doi.org/10.1051/0004-6361/202349078
Wempe,
E., Lavaux, G., White, S. D. M., Helmi, A.,
Jasche, J., & Stopyra, S. (2024). Constrained
cosmological simulations of the Local Group using Bayesian
hierarchical field-level inference. Astronomy
& Astrophysics, 691, Article A348. https://doi.org/10.1051/0004-6361/202450975
Gaia
Collaboration, Panuzzo, P., Mazeh, T., Arenou, F., Holl, B.,
Caffau, E., Jorissen, A., Babusiaux, C., Balbinot,
E., Helmi, A., & Khanna, S. (2024).
Discovery of a dormant 33 solar-mass black hole in
pre-release Gaia astrometry. Astronomy &
Astrophysics, 686, Article L2. https://doi.org/10.1051/0004-6361/202449763
Euclid
Collaboration, Mellier, Y., Abdurro’uf, Barroso, J. A.
A., Balbinot, E., Belikov, A. N.,
Buddelmeijer, H., Caputi, K. I.,
Corcho-Caballero, P., Dayal, P.,
Dröge, B., Helmi, A., Koopmans, L.
V. E., La Marca, A., Nagam, B.
C., Nutma, T., Peletier, R.
F., Saifollahi, T., Shulevski,
A., ... Williams, O. R. (2024).
Euclid. I. Overview of the Euclid mission.
arXiv. https://doi.org/10.48550/arXiv.2405.13491
Callingham,
T. M., & Helmi, A. (2024). Filling in
the blanks: A method to infer the substructure membership and
dynamics of 5D stars. Astronomy &
Astrophysics, 690, Article A98. https://doi.org/10.1051/0004-6361/202450745
Woudenberg,
H. C., & Helmi, A. (2024). First
measurement of the triaxiality of the inner dark matter halo of the
Milky Way. Astronomy &
Astrophysics, 691, Article A277. https://doi.org/10.1051/0004-6361/202451743
Gaia
Collaboration, Krone-Martins, A., Ducourant, C., Galluccio, L.,
Delchambre, L., Oreshina-Slezak, I., Teixeira, R., Braine, J.,
Khanna, S., & Helmi, A. (2024). Gaia Focused
Product Release: A catalogue of sources around quasars to search
for strongly lensed quasars. Astronomy &
Astrophysics, 685, Article A130. https://doi.org/10.1051/0004-6361/202347273
Matsuno,
T., Starkenburg, E., Balbinot,
E., & Helmi, A. (2024). Improving
metallicity estimates for very metal-poor stars in the Gaia DR3
GSP-Spec catalog. Astronomy &
Astrophysics, 685, Article A59. https://doi.org/10.1051/0004-6361/202245762
Koop,
O., & Helmi, A. (2024). Testing MOND
using the dynamics of nearby stellar streams.
Astronomy & Astrophysics, 689,
Article A57. https://doi.org/10.1051/0004-6361/202348211
Balbinot,
E., Dodd, E., Matsuno, T., Lardo, C.,
Helmi, A., Panuzzo, P., Mazeh, T., Holl, B., Caffau, E.,
Jorissen, A., Babusiaux, C., Gavras, P., Wyrzykowski, L., Eyer, L.,
Leclerc, N., Bombrun, A., Mowlavi, N., Seabroke, G. M.,
Cabrera-Ziri, I., ... Starkenburg, E. (2024).
The 33 M black hole Gaia BH3 is part of the disrupted ED-2
star cluster. Astronomy &
Astrophysics, 687, Article L3. https://doi.org/10.1051/0004-6361/202450425
Grønnow,
A., Fraternali, F., Marinacci, F.,
Pezzulli, G., Tolstoy, E., Helmi,
A., & Brown, A. G. A. (2024). The density of the
Milky Way’s corona at z ≈ 1.6 through ram pressure
stripping of the Draco dSph galaxy. Monthly
Notices of the Royal Astronomical Society,
528(2), 3009-3027. https://doi.org/10.1093/mnras/stae073
2023
The
WEAVE Instrumentation & Survey Consortia, Jin,
S., Trager, S. C., Dalton, G. B., Aguerri, J.
A. L., Drew, J. E., Falcón-Barroso, J., Gänsicke, B. T.,
Hess, K. M., Balbinot, E., Helmi,
A., Matsuno, T., Peletier, R.
F., Starkenburg, E., & Tolstoy,
E. (2024). The wide-field, multiplexed, spectroscopic
facility WEAVE: Survey design, overview, and simulated
implementation. Monthly Notices of the Royal
Astronomical Society, 530(3), 2688-2730. https://doi.org/10.1093/mnras/stad557
Tolstoy,
E., Skúladóttir, Á., Battaglia, G., Brown, A.
G. A., Massari, D., Irwin, M. J., Starkenburg,
E., Salvadori, S., Hill, V., Jablonka, P., Salaris, M., van
Essen, T., Olsthoorn, C., Helmi, A., & Pritchard,
J. (2023). A 3D view of dwarf galaxies with Gaia and
VLT/FLAMES. I. The Sculptor dwarf spheroidal.
Astronomy & Astrophysics, 675,
Article A49. https://doi.org/10.1051/0004-6361/202245717
Woudenberg,
H. C., Koop, O., Balbinot,
E., & Helmi, A. (2023).
Characterization and dynamics of the peculiar stream Jhelum:
A tentative role for the Sagittarius dwarf galaxy.
Astronomy & Astrophysics, 669,
Article A102. https://doi.org/10.1051/0004-6361/202243266
Balbinot,
E., Helmi, A., Callingham,
T., Matsuno, T., Dodd, E.,
& Ruiz-Lara, T. (2023). ED-2: A cold but not so
narrow stellar stream crossing the solar neighbourhood.
Astronomy & Astrophysics, 678,
Article A115. https://doi.org/10.1051/0004-6361/202347076
Babusiaux,
C., Fabricius, C., Khanna, S., Muraveva, T., Reylé, C., Spoto,
F., Vallenari, A., Luri, X., Arenou, F., Álvarez, M. A.,
Anders, F., Antoja, T., Balbinot, E., Barache, C.,
Bauchet, N., Bossini, D., Busonero, D., Cantat-Gaudin, T.,
Carrasco, J. M., ... Weiler, M. (2023). Gaia Data Release 3:
Catalogue validation. Astronomy &
Astrophysics, 674, Article A32. https://doi.org/10.1051/0004-6361/202243790
Gaia
Collaboration, Creevey, O. L., Sarro, L. M., Lobel, A., Pancino,
E., Andrae, R., Smart, R. L., Clementini, G., Balbinot,
E., Helmi, A., & Khanna, S. (2023).
Gaia Data Release 3: A golden sample of astrophysical
parameters. Astronomy &
Astrophysics, 674, Article A39. https://doi.org/10.1051/0004-6361/202243800
Gaia
Collaboration, Recio-Blanco, A., Kordopatis, G., de Laverny, P.,
Palicio, P. A., Spagna, A., Spina, L., Katz, D., Balbinot,
E., Helmi, A., & Khanna, S. (2023).
Gaia Data Release 3: Chemical cartography of the Milky
Way. Astronomy & Astrophysics,
674, Article A38. https://doi.org/10.1051/0004-6361/202243511
Gaia
Collaboration, Drimmel, R., Romero-Gomez, M., Chemin, L., Ramos,
P., Poggio, C. E., Ripepi, V., Andrae, R., Khanna, S.,
Balbinot, E., & Helmi, A. (2023).
Gaia Data Release 3: Mapping the asymmetric disc of the Milky
Way. Astronomy & Astrophysics,
674, Article A37. https://doi.org/10.1051/0004-6361/202243797
Gaia
Collaboration, De Ridder, J., Ripepi, V., Aerts, C., Palaversa, L.,
Eyer, L., Holl, B., Audard, M., Balbinot, E.,
Helmi, A., & Khanna, S. (2023). Gaia Data Release
3: Pulsations in main sequence OBAF-type stars.
Astronomy & Astrophysics, 674,
Article A36. https://doi.org/10.1051/0004-6361/202243767
Gaia
Collaboration, Schultheis, M., Zhao, H., Zwitter, T., Marshall, D.
J., Drimmel, R., Frémat, Y., Bailer-Jones, C. A. L.,
Balbinot, E., Helmi, A., & Khanna, S.
(2023). Gaia Data Release 3: Exploring and mapping the
diffuse interstellar band at 862 nm. Astronomy
& Astrophysics, 674, Article A40. https://doi.org/10.1051/0004-6361/202243283
Gaia
Collaboration, Vallenari, A., Brown, A. G. A., Prusti, T., de
Bruijne, J. H. J., Arenou, F., Babusiaux, C., Biermann, M.,
Balbinot, E., Helmi, A., & Khanna, S.
(2023). Gaia Data Release 3: Summary of the content and
survey properties. Astronomy &
Astrophysics, 674, Article A1. https://doi.org/10.1051/0004-6361/202243940
Gaia
Collaboration, Arenou, F., Babusiaux, C., Barstow, M. A., Faigler,
S., Jorissen, A., Kervella, P., Mazeh, T., Balbinot,
E., Helmi, A., & Khanna, S. (2023).
Gaia Data Release 3: Stellar multiplicity, a teaser for the
hidden treasure. Astronomy &
Astrophysics, 674, Article A34. https://doi.org/10.1051/0004-6361/202243782
Gaia
Collaboration, Montegriffo, P., Bellazzini, M., Angeli, F., Andrae,
R., Barstow, M. A., Bossini, D., Bragaglia, A., Balbinot,
E., Helmi, A., & Khanna, S. (2023).
Gaia Data Release 3: The Galaxy in your preferred colours:
Synthetic photometry from Gaia low-resolution spectra.
Astronomy & Astrophysics, 674,
Article A33. https://doi.org/10.1051/0004-6361/202243709
Dodd,
E., Callingham, T. M., Helmi,
A., Matsuno, T., Ruiz-Lara,
T., Balbinot, E., & Lövdal,
S. (2023). Gaia DR3 view of dynamical substructure in
the stellar halo near the Sun. Astronomy &
Astrophysics, 670, Article L2. https://doi.org/10.1051/0004-6361/202244546
Gaia
Collaboration, David, P., Mignard, F., Hestroffer, D., Tanga, P.,
Spoto, F., Berthier, J., Pauwels, T., Helmi, A., &
Khanna, S. (2023). Gaia Focused Product Release: Asteroid
orbital solution. Properties and assessment.
Astronomy & Astrophysics, 680,
Article A37. https://doi.org/10.1051/0004-6361/202347270
Gaia
Collaboration, Weingrill, K., Mints, A., Castaneda, J.,
Kostrzewa-Rutkowska, Z., Davidson, M., De Angeli, F., Hernandez,
J., Helmi, A., & Khanna, S. (2023). Gaia
Focused Product Release: Sources from Service Interface Function
image analysis. Half a million new sources in omega
Centauri. Astronomy &
Astrophysics, 680, Article A35. https://doi.org/10.1051/0004-6361/202347203
Gaia
Collaboration, Trabucchi, M., Mowlavi, N., Lebzelter, T.,
Lecoeur-Taibi, I., Audard, M., Eyer, L., Garcia-Lario, P.,
Helmi, A., & Khanna, S. (2023). Gaia Focused
Product Release: Radial velocity time series of long-period
variables. Astronomy &
Astrophysics, 680, Article A36. https://doi.org/10.1051/0004-6361/202347287
Gaia
Collaboration, Schultheis, M., Zhao, H., Zwitter, T., Bailer-Jones,
C. A. L., Carballo, R., Sordo, R., Drimmel, R., Helmi,
A., & Khanna, S. (2023). Gaia Focused Product
Release: Spatial distribution of two diffuse interstellar
bands. Astronomy & Astrophysics,
680, Article A38. https://doi.org/10.1051/0004-6361/202347103
Viswanathan,
A., Starkenburg, E., Koppelman, H.
H., Helmi, A., Balbinot, E., &
Esselink, A. F. (2023). Hidden deep in the halo: selection of
a reduced proper motion halo catalogue and mining retrograde
streams in the velocity space. Monthly Notices of
the Royal Astronomical Society, 521(2),
2087-2102. https://doi.org/10.1093/mnras/stad380
2022
Borre,
C. C., Aguirre Børsen-Koch, V., Helmi, A.,
Koppelman, H. H., Nielsen, M. B., Rørsted, J. L.,
Stello, D., Stokholm, A., Winther, M. L., Davies, G. R., Hon, M.,
Kruijssen, J. M. D., Laporte, C. F. P., Reyes, C., & Yu, J.
(2022). Age determination of galaxy merger remnant stars
using asteroseismology. Monthly Notices of the
Royal Astronomical Society, 514(2), 2527-2544.
https://doi.org/10.1093/mnras/stac1498
Reino,
S., Rossi, E. M., Sanderson, R. E., Sellentin, E., Helmi,
A., Koppelman, H. H., & Sharma, S. (2022).
Erratum: Galactic potential constraints from clustering in
action space of combined stellar stream data.
Monthly Notices of the Royal Astronomical
Society, 512, 4455-4463. https://doi.org/10.1093/mnras/stac694
Gaia
Collaboration, Klioner, S. A., Lindegren, L., Mignard, F.,
Hernández, J., Ramos-Lerate, M., Bastian, U., Biermann, M.,
Bombrun, A., de Torres, A., Gerlach, E., Geyer, R., Hilger, T.,
Hobbs, D., Lammers, U. L., McMillan, P. J., Steidelmüller, H.,
Teyssier, D., Raiteri, C. M., ... Zhao, H. (2022). Gaia Early
Data Release 3. The celestial reference frame (Gaia-CRF3).
Astronomy & Astrophysics, 667,
Article A148. https://doi.org/10.1051/0004-6361/202243483
Matsuno,
T., Koppelman, H. H., Helmi, A.,
Aoki, W., Ishigaki, M. N., Suda, T., Yuan, Z., & Hattori, K.
(2022). High-precision chemical abundances of Galactic
building blocks: The distinct chemical abundance sequence of
Sequoia. Astronomy & Astrophysics,
661, Article A103. https://doi.org/10.1051/0004-6361/202142752
Matsuno,
T., Dodd, E., Koppelman, H.
H., Helmi, A., Ishigaki, M. N., Aoki, W., Zhao,
J., Yuan, Z., & Hattori, K. (2022). High-precision
chemical abundances of Galactic building blocks: II. Revisiting the
chemical distinctness of the Helmi streams.
Astronomy & Astrophysics, 665,
Article A46. https://doi.org/10.1051/0004-6361/202243609
Lövdal,
S. S., Ruiz-Lara, T., Koppelman, H.
H., Matsuno, T., Dodd, E.,
& Helmi, A. (2022). Substructure in the stellar
halo near the Sun: I. Data-driven clustering in integrals-of-motion
space. Astronomy & Astrophysics,
665, Article A57. https://doi.org/10.1051/0004-6361/202243060
Ruiz-Lara,
T., Matsuno, T., Lövdal, S.
S., Helmi, A., Dodd, E.,
& Koppelman, H. H. (2022). Substructure in the
stellar halo near the Sun. II. Characterisation of independent
structures. Astronomy &
Astrophysics, 665, Article A58. https://doi.org/10.1051/0004-6361/202243061
Dodd,
E., Helmi, A., & Koppelman, H.
H. (2022). Substructures, resonances, and debris
streams: A new constraint on the inner shape of the Galactic dark
halo. Astronomy & Astrophysics,
659, Article A61. https://doi.org/10.1051/0004-6361/202141354
Ruiz-Lara,
T., Helmi, A., Gallart, C., Surot, F., &
Cassisi, S. (2022). Unveiling the past evolution of the
progenitor of the Helmi streams. Astronomy &
Astrophysics, 668, L10. https://doi.org/10.1051/0004-6361/202244127
2021
Gaia
Collaboration (2021). Corrigendum: Gaia Early Data Release 3.
Summary of the contents and survey properties.
Astronomy & Astrophysics, 650,
C3. https://doi.org/10.1051/0004-6361/202039657e
Koppelman,
H. H., & Helmi, A. (2021).
Determination of the escape velocity of the Milky Way using a
halo sample selected based on proper motion.
Astronomy & Astrophysics, 649,
Article A136. https://doi.org/10.1051/0004-6361/202038777
Koppelman,
H. H., Hagen, J. H. J., & Helmi,
A. (2021). Frequencies, chaos, and resonances: A study
of orbital parameters of nearby thick-disc and halo stars.
Astronomy & Astrophysics,
647(March 2021), Article A37. https://doi.org/10.1051/0004-6361/202039390
Gaia
Collaboration, Klioner, S. A., Mignard, F., Lindegren, L., Bastian,
U., McMillan, P. J., Hernández, J., Hobbs, D., Ramos-Lerate,
M., Biermann, M., Bombrun, A., de Torres, A., Gerlach, E., Geyer,
R., Hilger, T., Lammers, U., Steidelmüller, H., Stephenson, C.
A., Brown, A. G. A., ... Siebert, A. (2021). Gaia Early Data
Release 3. Acceleration of the Solar System from Gaia
astrometry. Astronomy &
Astrophysics, 649, Article A9. https://doi.org/10.1051/0004-6361/202039734
Fabricius,
C., Luri, X., Arenou, F., Babusiaux, C., Helmi, A.,
Muraveva, T., Reylé, C., Spoto, F., Vallenari, A., Antoja,
T., Balbinot, E., Barache, C., Bauchet, N., Bragaglia,
A., Busonero, D., Cantat-Gaudin, T., Carrasco, J. M., Diakité,
S., Fabrizio, M., ... Weiler, M. (2021). Gaia Early Data
Release 3. Catalogue validation. Astronomy &
Astrophysics, 649, Article A5. https://doi.org/10.1051/0004-6361/202039834
Gaia
Collaboration, Luri, X., Chemin, L., Clementini, G., Delgado, H.
E., McMillan, P. J., Romero-Gómez, M., Balbinot,
E., Helmi, A., Teyssier, D., Robin, A. C.,
Smith, M., Khanna, S., & Massari, D. (2021).
Gaia Early Data Release 3. Structure and properties of the
Magellanic Clouds. Astronomy &
Astrophysics, 649, Article A7. https://doi.org/10.1051/0004-6361/202039588
Gaia
Collaboration, Brown, A. G. A., Vallenari, A., Prusti, T., de
Bruijne, J. H. J., Babusiaux, C., Biermann, M., Creevey, O. L.,
Evans, D. W., Eyer, L., Hutton, A., Jansen, F., Jordi, C., Klioner,
S. A., Lammers, U., Lindegren, L., Luri, X., Mignard, F., Panem,
C., ... Siebert, A. (2021). Gaia Early Data Release 3.
Summary of the contents and survey properties.
Astronomy & Astrophysics, 649,
Article A1. https://doi.org/10.1051/0004-6361/202039657
Gaia
Collaboration, Smart, R. L., Sarro, L. M., Rybizki, J., Reylé,
C., Robin, A. C., Hambly, N. C., Abbas, U., Balbinot,
E., Helmi, A., & Khanna, S. (2021).
Gaia Early Data Release 3. The Gaia Catalogue of Nearby
Stars. Astronomy & Astrophysics,
649, A6. https://doi.org/10.1051/0004-6361/202039498
Gaia
Collaboration, Antoja, T., McMillan, P. J., Kordopatis, G., Ramos,
P., Helmi, A., Balbinot, E.,
Cantat-Gaudin, T., Chemin, L., Figueras, F., Jordi, C., Khanna, S.,
Romero-Gómez, M., Seabroke, G. M., Brown, A. G. A., Vallenari,
A., Prusti, T., de Bruijne, J. H. J., Babusiaux, C., ... Siebert,
A. (2021). Gaia Early Data Release 3. The Galactic
anticentre. Astronomy &
Astrophysics, 649, Article A8. https://doi.org/10.1051/0004-6361/202039714
Luri,
X., Fabricius, C., Antoja, T., Arenou, F., Babusiaux, C.,
Balbinot, E., Barache, C., Bauchet, N., Carrasco, J. M.,
Diakité, S., Figueras, F., Garcia-Gutierrez, A., Helmi,
A., Jordi, C., Khanna, S., Leclerc, N., Masip, A., Muraveva,
T., Ramos, P., ... Weiler, M. (2021). Gaia EDR3
documentation Chapter 8: Gaia EDR3 documentation Chapter 8:
Validation. EUROPEAN SPACE AGENCY. https://ui.adsabs.harvard.edu/abs/2021gdr3.reptE...8L
Reino,
S., Rossi, E. M., Sanderson, R. E., Sellentin, E., Helmi,
A., Koppelman, H. H., & Sharma, S. (2021).
Galactic potential constraints from clustering in action
space of combined stellar stream data. Monthly
Notices of the Royal Astronomical Society,
502(3), 4170-4193. https://doi.org/10.1093/mnras/stab304
Recio-Blanco,
A., Fernández-Alvar, E., de Laverny, P., Antoja, T.,
Helmi, A., & Crida, A. (2021). Heavy-elements
heritage of the falling sky. Astronomy &
Astrophysics, 648, Article A108. https://doi.org/10.1051/0004-6361/202038943
Balbinot,
E., & Helmi, A. (2021). Linking
nearby stellar streams to more distant halo overdensities.
Astronomy & Astrophysics, 654,
Article A15. https://doi.org/10.1051/0004-6361/202141015
Valentijn,
E. A., Lineweaver, C. H., van der Velde, K.
J., Scholtens, S., Amunts, K., Schemmel, J.,
Silvestri, A., Helmi, A., Ynnerman, A., Brouwer,
M., Falcke, H., Vandersypen, L., van Haarlem, M.,
Samardjiska, S., & Sloot, P. (2021). People’s
information Universe. In E. A. Valentijn (Ed.), Powers
of Two: The Information Universe - Information as the Building
Block of Everything (pp. 23-106). Springer. https://doi.org/10.1007/978-3-030-58345-3_3
Matsuno,
T., Hirai, Y., Tarumi, Y., Hotokezaka, K., Tanaka, M.,
& Helmi, A. (2021). R-process enhancements of
Gaia-Enceladus in GALAH DR3. Astronomy &
Astrophysics, 650, Article A110. https://doi.org/10.1051/0004-6361/202040227
Koppelman,
H. H., & Helmi, A. (2021). The
reduced proper motion selected halo: Methods and description of the
catalogue. Astronomy &
Astrophysics, 645(January 2021), Article A69.
https://doi.org/10.1051/0004-6361/202038178
Koppelman,
H. H., & Helmi, A. (2021). Time
evolution of gaps in stellar streams in axisymmetric Stäckel
potentials. Astronomy &
Astrophysics, 649, Article A55. https://doi.org/10.1051/0004-6361/202039968
Skúladóttir,
Á., Salvadori, S., Amarsi, A. M., Tolstoy, E.,
Irwin, M. J., Hill, V., Jablonka, P., Battaglia, G.,
Starkenburg, E., Massari, D., Helmi,
A., & Posti, L. (2021). Zero-metallicity Hypernova
Uncovered by an Ultra-metal-poor Star in the Sculptor Dwarf
Spheroidal Galaxy. The Astrophysical
Journal, 915(2), Article L30. https://doi.org/10.3847/2041-8213/ac0dc2
2020
Antoja,
T., Ramos, P., Mateu, C., Helmi, A., Anders, F.,
Jordi, C., & Carballo-Bello, J. A. (2020). An all-sky
proper-motion map of the Sagittarius stream using Gaia DR2.
Astronomy & Astrophysics, 635,
Article 3. https://doi.org/10.1051/0004-6361/201937145
Matsuno,
T., Koppelman, H. H., & Helmi,
A. (2020). Bright Stars from the Ancient Merger
Gaia-Enceladus Visible with Binoculars. Research
Notes of the AAS, 4(12), Article 246. https://doi.org/10.3847/2515-5172/abd4d1
Gaia
Collaboration (2020). Corrigendum: Gaia Data Release 2
Kinematics of globular clusters and dwarf galaxies around the Milky
Way. Astronomy & Astrophysics,
637, Article C3. https://doi.org/10.1051/0004-6361/201832698e
Elias,
L. M., Sales, L. V., Helmi, A., & Hernquist, L.
(2020). Cosmological insights into the assembly of the radial
and compact stellar halo of the Milky Way. Monthly
Notices of the Royal Astronomical Society,
495(1), 29-39. https://doi.org/10.1093/mnras/staa1090
Ramos,
P., Mateu, C., Antoja, T., Helmi, A., Castro-Ginard,
A., Balbinot, E., & Carrasco, J. M. (2020).
Full 5D characterisation of the Sagittarius stream with Gaia
DR2 RR Lyrae. Astronomy &
Astrophysics, 638, Article A104. https://doi.org/10.1051/0004-6361/202037819
Ramos,
P., Mateu, C., Antoja, T., Helmi, A., Castro-Ginard,
A., Balbinot, E., & Carrasco, J. M. (2020).
Full 5D characterisation of the Sagittarius stream with Gaia
DR2 RR Lyrae (Corrigendum). Astronomy &
Astrophysics, 640, Article C5. https://doi.org/10.1051/0004-6361/202037819e
Gaia
Collaboration, Helmi, A., Massari, D.,
Breddels, M. A., & Veljanoski, J. (2020). Gaia Data
Release 2. The kinematics of globular clusters and dwarf galaxies
around the Milky Way (Corrigendum). Astronomy
& Astrophysics, 642, Article C1. https://doi.org/10.1051/0004-6361/202039217
Massari,
D., Helmi, A., Mucciarelli, A., Sales, L.,
Spina, L., & Tolstoy, E. (2020). Stellar 3D
kinematics in the Draco dwarf spheroidal galaxy.
Astronomy & Astrophysics, 633,
Article 36. https://doi.org/10.1051/0004-6361/201935613
Helmi,
A. (2020). Streams, Substructures, and the Early
History of the Milky Way. Annual Review of
Astronomy and Astrophysics, 58, 205-256. https://doi.org/10.1146/annurev-astro-032620-021917
Theler,
R., Jablonka, P., Lucchesi, R., Lardo, C., North, P., Irwin, M.,
Battaglia, G., Hill, V., Tolstoy, E., Venn, K.,
Helmi, A., Kaufer, A., Primas, F., & Shetrone, M.
(2020). The chemical evolution of the dwarf spheroidal galaxy
Sextans. Astronomy & Astrophysics,
642, Article A176. https://doi.org/10.1051/0004-6361/201937146
Ramos,
P., Antoja, T., Mateu, C., Helmi, A., Castro-Ginard,
A., Anders, F., Jordi, C., Carballo-Bello, J. A., Balbinot,
E., & Carrasco, J. M. (2020). The Halo-Disc
dynamical coupling: Gaia blind detection of the Monoceros and ACS
structures. Paper presented at XIV.0 Scientific Meeting
(virtual) of the Spanish Astronomical Society, held 13-15 July
2020.
Koppelman,
H. H., Bos, R. O. Y., & Helmi, A. (2020).
The messy merger of a large satellite and a Milky Way-like
galaxy. Astronomy & Astrophysics,
642, Article L18. https://doi.org/10.1051/0004-6361/202038652
Antoja,
T., Ramos, P., Mateu, C., Helmi, A., Castro-Ginard,
A., Anders, F., Jordi, C., Carballo-Bello, J. A., Balbinot,
E., & Carrasco, J. M. (2020). The Sagittarius
stream with Gaia data. Paper presented at EA XIV.0
Reunión Científica .
RAVE
Collaboration (2020). The Sixth Data Release of the Radial
Velocity Experiment (Rave). II. Stellar Atmospheric Parameters,
Chemical Abundances, and Distances. The
Astronomical Journal, 160(2), Article 83. https://doi.org/10.3847/1538-3881/ab9ab8
RAVE
Collaboration (2020). The Sixth Data Release of the Radial
Velocity Experiment (RAVE). I. Survey Description, Spectra, and
Radial Velocities. The Astronomical
Journal, 160(2), Article 82. https://doi.org/10.3847/1538-3881/ab9ab9
2019
4MOST,
de Jong, R. S., Agertz, O., Agudo Berbel, A., Aird, J., Alexander,
D. A., Amarsi, A., Anders, F., Andrae, R., Ansarinejad, B.,
Ansorge, W., Antilogus, P., Anwand-Heerwart, H., Arentsen, A.,
Arnadottir, A., Asplund, M., Auger, M., Azais, N., Baade, D., ...
Kuijken, K. (2019). 4MOST: Project overview and information
for the First Call for Proposals. ESO
Messenger, 175. http://adsabs.harvard.edu/abs/2019arXiv190302464D
Helmi,
A., Irwin, M., Deason, A., Balbinot, E.,
Belokurov, V., Bland-Hawthorn, J., Christlieb, N., Cioni, M. .-R.
L., Feltzing, S., Grebel, E. K., Kordopatis, G., Starkenburg,
E., Walton, N., & Worley, C. C. (2019). 4MOST
Consortium Survey 1: The Milky Way Halo Low-Resolution
Survey. The Messenger, 175,
23-25. https://doi.org/10.18727/0722-6691/5120
Christlieb,
N., Battistini, C., Bonifacio, P., Caffau, E., Ludwig, H. .-G.,
Asplund, M., Barklem, P., Bergemann, M., Church, R., Feltzing, S.,
Ford, D., Grebel, E. K., Hansen, C. J., Helmi, A.,
Kordopatis, G., Kovalev, M., Korn, A., Lind, K., Quirrenbach,
A., ... Starkenburg, E. (2019). 4MOST Consortium
Survey 2: The Milky Way Halo High-Resolution Survey.
The Messenger, 175, 26-29. https://doi.org/10.18727/0722-6691/5121
Bignone,
L. A., Helmi, A., & Tissera, P. B. (2019). A
Gaia-Enceladus Analog in the EAGLE Simulation: Insights into the
Early Evolution of the Milky Way. Astrophysical
Journal Letters, 883(1), Article 5. https://doi.org/10.3847/2041-8213/ab3e0e
Hagen,
J. H. J., Helmi, A., & Breddels, M. A.
(2019). Axisymmetric Schwarzschild models of an isothermal
axisymmetric mock dwarf spheroidal galaxy.
Astronomy & Astrophysics, 632,
Article 99. https://doi.org/10.1051/0004-6361/201936196
Koppelman,
H. H., Helmi, A., Massari, D.,
Roelenga, S., & Bastian, U. (2019). Characterization and
history of the Helmi streams with Gaia DR2.
Astronomy & Astrophysics, 625,
Article A5. https://doi.org/10.1051/0004-6361/201834769
Gaia
Collaboration (2019). Gaia Data Release 2. Variable stars in
the colour-absolute magnitude diagram. Astronomy
& Astrophysics, 623, Article A110. https://doi.org/10.1051/0004-6361/201833304
Posti,
L., & Helmi, A. (2019). Mass and shape of
the Milky Way's dark matter halo with globular clusters from Gaia
and Hubble. Astronomy &
Astrophysics, 621, Article 56. https://doi.org/10.1051/0004-6361/201833355
Koppelman,
H. H., Helmi, A., Massari, D.,
Price-Whelan, A. M., & Starkenburg, T. K. (2019).
Multiple retrograde substructures in the Galactic halo: A
shattered view of Galactic history. Astronomy
& Astrophysics, 631, Article L9. https://doi.org/10.1051/0004-6361/201936738
Massari,
D., Koppelman, H. H., & Helmi,
A. (2019). Origin of the system of globular clusters
in the Milky Way. Astronomy &
Astrophysics, 630, Article L4. https://doi.org/10.1051/0004-6361/201936135
Sakari,
C. M., Roederer, I. U., Placco, V. M., Beers, T. C., Ezzeddine, R.,
Frebel, A., Hansen, T., Sneden, C., Cowan, J. J., Wallerstein, G.,
Farrell, E. M., Venn, K. A., Matijevič, G., Wyse, R. F. G.,
Bland-Hawthorn, J., Chiappini, C., Freeman, K. C., Gibson, B. K.,
Grebel, E. K., ... Watson, F. (2019). The R-Process Alliance:
Discovery of a Low-α, r-process-enhanced Metal-poor Star in
the Galactic Halo. The Astrophysical
Journal, 874(2), Article 148. https://doi.org/10.3847/1538-4357/ab0c02
Hagen,
J. H. J., Helmi, A., de Zeeuw, P. T., &
Posti, L. (2019). The tilt of the velocity ellipsoid in the
Milky Way with Gaia DR2. Astronomy &
Astrophysics, 629, 1-14. Article A70. https://doi.org/10.1051/0004-6361/201935264
Hill,
V., Skúladóttir, Á., Tolstoy, E., Venn,
K. A., Shetrone, M. D., Jablonka, P., Primas, F., Battaglia, G., de
Boer, T. J. L., François, P., Helmi, A., Kaufer,
A., Letarte, B., Starkenburg, E., & Spite, M.
(2019). VLT/FLAMES high-resolution chemical abundances in
Sculptor: a textbook dwarf spheroidal galaxy.
Astronomy & Astrophysics, 626,
Article A15. https://doi.org/10.1051/0004-6361/201833950
2018
Antoja,
T., Helmi, A., Romero-Gómez, M., Katz, D.,
Babusiaux, C., Drimmel, R., Evans, D. W., Figueras, F., Poggio, E.,
Reylé, C., Robin, A. C., Seabroke, G., & Soubiran, C.
(2018). A dynamically young and perturbed Milky Way
disk. Nature, 561(7723),
360-362. https://doi.org/10.1038/s41586-018-0510-7
Letarte,
B., Hill, V., Tolstoy, E., Jablonka, P., Shetrone, M.,
Venn, K. A., Spite, M., Irwin, M. J., Battaglia, G., Helmi,
A., Primas, F., François, P., Kaufer, A., Szeifert, T.,
Arimoto, N., & Sadakane, K. (2018). Corrigendum: A
high-resolution VLT/FLAMES study of individual stars in the centre
of the Fornax dwarf spheroidal galaxy. Astronomy
& Astrophysics, 613, C1. https://doi.org/10.1051/0004-6361/200913413e
Gaia
Collaboration (2018). Gaia Data Release 2: Kinematics of
globular clusters and dwarf galaxies around the Milky Way.
Astronomy & Astrophysics, 616,
A12. Article 12. https://doi.org/10.1051/0004-6361/201832698
Gaia
Collaboration (2018). Gaia Data Release 2: Observational
Hertzsprung-Russell diagrams. Unpublished. https://doi.org/10.1051/0004-6361/201832843
Arenou,
F., Luri, X., Babusiaux, C., Fabricius, C., Helmi, A.,
Muraveva, T., Robin, A. C., Spoto, F., Vallenari, A., Antoja, T.,
Cantat-Gaudin, T., Jordi, C., Leclerc, N., Reyle, C., Romero-Gomez,
M., Shih, I. .-C., Soria, S., Barache, C., Bossini, D., ...
Zurbach, C. (2018). Gaia Data Release 2: Catalogue
validation. Unpublished. https://doi.org/10.1051/0004-6361/201833234
Gaia
Collaboration (2018). Gaia Data Release 2: The celestial
reference frame (Gaia-CRF2). Astronomy &
Astrophysics, 616, Article A14. https://doi.org/10.1051/0004-6361/201832916
Gaia
Collaboration (2018). Gaia Data Release 2: Observations of
solar system objects. Astronomy &
Astrophysics, 616, Article 13. https://doi.org/10.1051/0004-6361/201832900
Gaia
Collaboration (2018). Gaia Data Release 2: Mapping the Milky
Way disc kinematics. Astronomy &
Astrophysics, 616, Article 11. https://doi.org/10.1051/0004-6361/201832865
Gaia
Collaboration (2018). Gaia Data Release 2: Summary of the
contents and survey properties. Astronomy &
Astrophysics, 616, Article 1. https://doi.org/10.1051/0004-6361/201833051
McMillan,
P. J., Kordopatis, G., Kunder, A., Binney, J., Wojno, J., Zwitter,
T., Steinmetz, M., Bland-Hawthorn, J., Gibson, B. K., Gilmore, G.,
Grebel, E. K., Helmi, A., Munari, U., Navarro, J. F.,
Parker, Q. A., Seabroke, G., Watson, F., & Wyse, R. F. G.
(2018). Improved distances and ages for stars common to TGAS
and RAVE. Monthly Notices of the Royal
Astronomical Society, 477(4), 5279-5300. https://doi.org/10.1093/mnras/sty990
Carrillo,
I., Minchev, I., Kordopatis, G., Steinmetz, M., Binney, J., Anders,
F., Bienaymé, O., Bland-Hawthorn, J., Famaey, B., Freeman, K.
C., Gilmore, G., Gibson, B. K., Grebel, E. K., Helmi,
A., Just, A., Kunder, A., McMillan, P., Monari, G., Munari,
U., ... Zwitter, T. (2018). Is the Milky Way still breathing?
RAVE-Gaia streaming motions. Monthly Notices of
the Royal Astronomical Society, 475(2),
2679-2696. https://doi.org/10.1093/mnras/stx3342
Koppelman,
H., Helmi, A., & Veljanoski, J. (2018).
One Large Blob and Many Streams Frosting the nearby Stellar
Halo in Gaia~DR2. Astrophysical Journal
Letters, 860(1), Article L11. https://doi.org/10.3847/2041-8213/aac882
Posti,
L., Helmi, A., Veljanoski, J., & Breddels, M. A.
(2018). The dynamically selected stellar halo of the Galaxy
with Gaia and the tilt of the velocity ellipsoid.
Astronomy & Astrophysics, 615,
Article A70. https://doi.org/10.1051/0004-6361/201732277
Hagen,
J. H. J., & Helmi, A. (2018). The
kinematics and surface mass density in the solar neighbourhood
using TGASxRAVE. In A. Recio-Blanco, P. de Laverny, A. G. A.
Brown, & T. Prusti (Eds.), Proceedings of the International
Astronomical Unian: Astrometry and astrophysics in the Gaia
sky (Vol. 12, pp. 160-163). Cambridge University Press. https://doi.org/10.1017/S1743921317005725
| Laatst gewijzigd: | 05 juni 2025 12:47 |
View this page in: English