Publication

Testing Verlinde's emergent gravity in early-type galaxies

Tortora, C., Koopmans, L. V. E., Napolitano, N. R. & Valentijn, E. A., Jan-2018, In : Monthly Notices of the Royal Astronomical Society. 473, 2, p. 2324-2334 11 p.

Research output: Contribution to journalArticleAcademicpeer-review

APA

Tortora, C., Koopmans, L. V. E., Napolitano, N. R., & Valentijn, E. A. (2018). Testing Verlinde's emergent gravity in early-type galaxies. Monthly Notices of the Royal Astronomical Society, 473(2), 2324-2334. https://doi.org/10.1093/mnras/stx2432

Author

Tortora, C. ; Koopmans, L. V. E. ; Napolitano, N. R. ; Valentijn, E. A. / Testing Verlinde's emergent gravity in early-type galaxies. In: Monthly Notices of the Royal Astronomical Society. 2018 ; Vol. 473, No. 2. pp. 2324-2334.

Harvard

Tortora, C, Koopmans, LVE, Napolitano, NR & Valentijn, EA 2018, 'Testing Verlinde's emergent gravity in early-type galaxies', Monthly Notices of the Royal Astronomical Society, vol. 473, no. 2, pp. 2324-2334. https://doi.org/10.1093/mnras/stx2432

Standard

Testing Verlinde's emergent gravity in early-type galaxies. / Tortora, C.; Koopmans, L. V. E.; Napolitano, N. R.; Valentijn, E. A.

In: Monthly Notices of the Royal Astronomical Society, Vol. 473, No. 2, 01.2018, p. 2324-2334.

Research output: Contribution to journalArticleAcademicpeer-review

Vancouver

Tortora C, Koopmans LVE, Napolitano NR, Valentijn EA. Testing Verlinde's emergent gravity in early-type galaxies. Monthly Notices of the Royal Astronomical Society. 2018 Jan;473(2):2324-2334. https://doi.org/10.1093/mnras/stx2432


BibTeX

@article{e11f2991b2c345dcae955afab95701fc,
title = "Testing Verlinde's emergent gravity in early-type galaxies",
abstract = "Emergent Gravity (EG) has been proposed to resolve the missing mass problem in galaxies, replacing the potential of dark matter (DM) by the effect of the entropy displacement of dark energy by baryonic matter. This apparent DM depends only on the baryonic mass distribution and the present-day value of the Hubble parameter. In this paper we test the EG proposition, formalized by Verlinde for a spherical and isolated mass distribution using the central dynamics (Sloan Digital Sky Survey velocity dispersion, sigma) and the K-band light distribution in a sample of 4032 massive (M-star greater than or similar to 10(10) M circle dot) and local early-type galaxies (ETGs) from the SPIDER datasample. Our results remain unaltered if we consider the sample of 750 roundest field galaxies. Using these observations we derive the predictions by EG for the stellar mass-to-light ratio (M/L) and the initial mass function (IMF). We demonstrate that, consistently with a classical Newtonian framework with a DM halo component or alternative theories of gravity as MOdified Newtonian Dynamics (MOND), the central dynamics can be fitted if the IMF is assumed non-universal and systematically changing with s. For the case of EG, we find lower, but still acceptable, stellar M/L if compared with the DM-based Navarro, Frenk & White (NFW) model and with MOND, but pretty similar to adiabatically contracted DM haloes and with expectations from spectral gravity-sensitive features. If the strain caused by the entropy displacement would be not maximal, as adopted in the current formulation, then the dynamics of ETGs could be reproduced with larger M/L.",
keywords = "galaxies: elliptical and lenticular, cD, galaxies: evolution, galaxies: general, galaxies: structure, dark matter, INITIAL MASS FUNCTION, MODIFIED NEWTONIAN DYNAMICS, CENTRAL DARK-MATTER, TO-LIGHT RATIO, GIANT ELLIPTIC GALAXIES, EQUATION-OF-STATE, DATA RELEASE 7, FUNDAMENTAL PLANE, SCALING RELATIONS, 2-DIMENSIONAL KINEMATICS",
author = "C. Tortora and Koopmans, {L. V. E.} and Napolitano, {N. R.} and Valentijn, {E. A.}",
year = "2018",
month = "1",
doi = "10.1093/mnras/stx2432",
language = "English",
volume = "473",
pages = "2324--2334",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "2",

}

RIS

TY - JOUR

T1 - Testing Verlinde's emergent gravity in early-type galaxies

AU - Tortora, C.

AU - Koopmans, L. V. E.

AU - Napolitano, N. R.

AU - Valentijn, E. A.

PY - 2018/1

Y1 - 2018/1

N2 - Emergent Gravity (EG) has been proposed to resolve the missing mass problem in galaxies, replacing the potential of dark matter (DM) by the effect of the entropy displacement of dark energy by baryonic matter. This apparent DM depends only on the baryonic mass distribution and the present-day value of the Hubble parameter. In this paper we test the EG proposition, formalized by Verlinde for a spherical and isolated mass distribution using the central dynamics (Sloan Digital Sky Survey velocity dispersion, sigma) and the K-band light distribution in a sample of 4032 massive (M-star greater than or similar to 10(10) M circle dot) and local early-type galaxies (ETGs) from the SPIDER datasample. Our results remain unaltered if we consider the sample of 750 roundest field galaxies. Using these observations we derive the predictions by EG for the stellar mass-to-light ratio (M/L) and the initial mass function (IMF). We demonstrate that, consistently with a classical Newtonian framework with a DM halo component or alternative theories of gravity as MOdified Newtonian Dynamics (MOND), the central dynamics can be fitted if the IMF is assumed non-universal and systematically changing with s. For the case of EG, we find lower, but still acceptable, stellar M/L if compared with the DM-based Navarro, Frenk & White (NFW) model and with MOND, but pretty similar to adiabatically contracted DM haloes and with expectations from spectral gravity-sensitive features. If the strain caused by the entropy displacement would be not maximal, as adopted in the current formulation, then the dynamics of ETGs could be reproduced with larger M/L.

AB - Emergent Gravity (EG) has been proposed to resolve the missing mass problem in galaxies, replacing the potential of dark matter (DM) by the effect of the entropy displacement of dark energy by baryonic matter. This apparent DM depends only on the baryonic mass distribution and the present-day value of the Hubble parameter. In this paper we test the EG proposition, formalized by Verlinde for a spherical and isolated mass distribution using the central dynamics (Sloan Digital Sky Survey velocity dispersion, sigma) and the K-band light distribution in a sample of 4032 massive (M-star greater than or similar to 10(10) M circle dot) and local early-type galaxies (ETGs) from the SPIDER datasample. Our results remain unaltered if we consider the sample of 750 roundest field galaxies. Using these observations we derive the predictions by EG for the stellar mass-to-light ratio (M/L) and the initial mass function (IMF). We demonstrate that, consistently with a classical Newtonian framework with a DM halo component or alternative theories of gravity as MOdified Newtonian Dynamics (MOND), the central dynamics can be fitted if the IMF is assumed non-universal and systematically changing with s. For the case of EG, we find lower, but still acceptable, stellar M/L if compared with the DM-based Navarro, Frenk & White (NFW) model and with MOND, but pretty similar to adiabatically contracted DM haloes and with expectations from spectral gravity-sensitive features. If the strain caused by the entropy displacement would be not maximal, as adopted in the current formulation, then the dynamics of ETGs could be reproduced with larger M/L.

KW - galaxies: elliptical and lenticular, cD

KW - galaxies: evolution

KW - galaxies: general

KW - galaxies: structure

KW - dark matter

KW - INITIAL MASS FUNCTION

KW - MODIFIED NEWTONIAN DYNAMICS

KW - CENTRAL DARK-MATTER

KW - TO-LIGHT RATIO

KW - GIANT ELLIPTIC GALAXIES

KW - EQUATION-OF-STATE

KW - DATA RELEASE 7

KW - FUNDAMENTAL PLANE

KW - SCALING RELATIONS

KW - 2-DIMENSIONAL KINEMATICS

U2 - 10.1093/mnras/stx2432

DO - 10.1093/mnras/stx2432

M3 - Article

VL - 473

SP - 2324

EP - 2334

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 2

ER -

ID: 78468987