Publication

THE STRUCTURE AND DYNAMICS OF MASSIVE EARLY-TYPE GALAXIES: ON HOMOLOGY, ISOTHERMALITY, AND ISOTROPY INSIDE ONE EFFECTIVE RADIUS

Koopmans, L. V. E., Bolton, A., Treu, T., Czoske, O., Auger, M. W., Barnabe, M., Vegetti, S., Gavazzi, R., Moustakas, L. A. & Burles, S., 20-Sep-2009, In : Astrophysical Journal Letters. 703, 1, p. L51-L54 4 p.

Research output: Contribution to journalArticleAcademicpeer-review

APA

Koopmans, L. V. E., Bolton, A., Treu, T., Czoske, O., Auger, M. W., Barnabe, M., Vegetti, S., Gavazzi, R., Moustakas, L. A., & Burles, S. (2009). THE STRUCTURE AND DYNAMICS OF MASSIVE EARLY-TYPE GALAXIES: ON HOMOLOGY, ISOTHERMALITY, AND ISOTROPY INSIDE ONE EFFECTIVE RADIUS. Astrophysical Journal Letters, 703(1), L51-L54. https://doi.org/10.1088/0004-637X/703/1/L51

Author

Koopmans, L. V. E. ; Bolton, A. ; Treu, T. ; Czoske, O. ; Auger, M. W. ; Barnabe, M. ; Vegetti, S. ; Gavazzi, R. ; Moustakas, L. A. ; Burles, S. / THE STRUCTURE AND DYNAMICS OF MASSIVE EARLY-TYPE GALAXIES : ON HOMOLOGY, ISOTHERMALITY, AND ISOTROPY INSIDE ONE EFFECTIVE RADIUS. In: Astrophysical Journal Letters. 2009 ; Vol. 703, No. 1. pp. L51-L54.

Harvard

Koopmans, LVE, Bolton, A, Treu, T, Czoske, O, Auger, MW, Barnabe, M, Vegetti, S, Gavazzi, R, Moustakas, LA & Burles, S 2009, 'THE STRUCTURE AND DYNAMICS OF MASSIVE EARLY-TYPE GALAXIES: ON HOMOLOGY, ISOTHERMALITY, AND ISOTROPY INSIDE ONE EFFECTIVE RADIUS', Astrophysical Journal Letters, vol. 703, no. 1, pp. L51-L54. https://doi.org/10.1088/0004-637X/703/1/L51

Standard

THE STRUCTURE AND DYNAMICS OF MASSIVE EARLY-TYPE GALAXIES : ON HOMOLOGY, ISOTHERMALITY, AND ISOTROPY INSIDE ONE EFFECTIVE RADIUS. / Koopmans, L. V. E.; Bolton, A.; Treu, T.; Czoske, O.; Auger, M. W.; Barnabe, M.; Vegetti, S.; Gavazzi, R.; Moustakas, L. A.; Burles, S.

In: Astrophysical Journal Letters, Vol. 703, No. 1, 20.09.2009, p. L51-L54.

Research output: Contribution to journalArticleAcademicpeer-review

Vancouver

Koopmans LVE, Bolton A, Treu T, Czoske O, Auger MW, Barnabe M et al. THE STRUCTURE AND DYNAMICS OF MASSIVE EARLY-TYPE GALAXIES: ON HOMOLOGY, ISOTHERMALITY, AND ISOTROPY INSIDE ONE EFFECTIVE RADIUS. Astrophysical Journal Letters. 2009 Sep 20;703(1):L51-L54. https://doi.org/10.1088/0004-637X/703/1/L51


BibTeX

@article{513ac38b39df47db9f81ec532ec09a2d,
title = "THE STRUCTURE AND DYNAMICS OF MASSIVE EARLY-TYPE GALAXIES: ON HOMOLOGY, ISOTHERMALITY, AND ISOTROPY INSIDE ONE EFFECTIVE RADIUS",
abstract = "Based on 58 SLACS strong-lens early-type galaxies (ETGs) with direct total-mass and stellar-velocity dispersion measurements, we find that inside one effective radius maassive elliptical galaxies with M(eff) greater than or similar to 3 x 10(10) M(circle dot.) are well approximated by a power-law ellipsoid, with an average logarithmic density slope of equivalent to -d log(rho(tot))/d log(r) = 2.085(-0.018)(+0.025) and sigma(gamma') less than or similar to 0.20(-0.02)(+0.04) (random error on mean) for isotropic orbits with beta(r) = 0, +/- 0.1 (syst.) intrinsic scatter (all errors indicate the 68% CL). We find no correlation of gamma'(LD) with galaxy mass (M(eff)), rescaled radius (i.e., R(einst)/R(eff)) or redshift, despite intrinsic differences in density-slope between galaxies. Based on scaling relations, the average logarithmic density slope can be derived in an alternative manner, fully independent from dynamics, yielding = 1.959 +/- 0.077. Agreement between the two values is reached for = 0.45 +/- 0.25, consistent with mild radial anisotropy. This agreement supports the robustness of our results, despite the increase in mass-to-light ratio with total galaxy mass: M(eff) proportional to L(V,eff)(1.363 +/- 0.056). We conclude that massive ETGs are structurally close to homologous with close to isothermal total density profiles (less than or similar to 10% intrinsic scatter) and have at most some mild radial anisotropy. Our results provide new observational limits on galaxy formation and evolution scenarios, covering 4 Gyr look-back time.",
keywords = "galaxies: structure, gravitational lensing, LENS ACS SURVEY, ABSOLUTE MAGNITUDE RELATION, SUPERMASSIVE BLACK-HOLES, COLD DARK MATTER, ELLIPTIC GALAXIES, FUNDAMENTAL PLANE, SPHERICAL GALAXIES, GRAVITATIONAL LENSES, INTERNAL STRUCTURE, SAURON PROJECT",
author = "Koopmans, {L. V. E.} and A. Bolton and T. Treu and O. Czoske and Auger, {M. W.} and M. Barnabe and S. Vegetti and R. Gavazzi and Moustakas, {L. A.} and S. Burles",
year = "2009",
month = sep,
day = "20",
doi = "10.1088/0004-637X/703/1/L51",
language = "English",
volume = "703",
pages = "L51--L54",
journal = "Astrophysical Journal Letters",
issn = "2041-8205",
publisher = "IOP PUBLISHING LTD",
number = "1",

}

RIS

TY - JOUR

T1 - THE STRUCTURE AND DYNAMICS OF MASSIVE EARLY-TYPE GALAXIES

T2 - ON HOMOLOGY, ISOTHERMALITY, AND ISOTROPY INSIDE ONE EFFECTIVE RADIUS

AU - Koopmans, L. V. E.

AU - Bolton, A.

AU - Treu, T.

AU - Czoske, O.

AU - Auger, M. W.

AU - Barnabe, M.

AU - Vegetti, S.

AU - Gavazzi, R.

AU - Moustakas, L. A.

AU - Burles, S.

PY - 2009/9/20

Y1 - 2009/9/20

N2 - Based on 58 SLACS strong-lens early-type galaxies (ETGs) with direct total-mass and stellar-velocity dispersion measurements, we find that inside one effective radius maassive elliptical galaxies with M(eff) greater than or similar to 3 x 10(10) M(circle dot.) are well approximated by a power-law ellipsoid, with an average logarithmic density slope of equivalent to -d log(rho(tot))/d log(r) = 2.085(-0.018)(+0.025) and sigma(gamma') less than or similar to 0.20(-0.02)(+0.04) (random error on mean) for isotropic orbits with beta(r) = 0, +/- 0.1 (syst.) intrinsic scatter (all errors indicate the 68% CL). We find no correlation of gamma'(LD) with galaxy mass (M(eff)), rescaled radius (i.e., R(einst)/R(eff)) or redshift, despite intrinsic differences in density-slope between galaxies. Based on scaling relations, the average logarithmic density slope can be derived in an alternative manner, fully independent from dynamics, yielding = 1.959 +/- 0.077. Agreement between the two values is reached for = 0.45 +/- 0.25, consistent with mild radial anisotropy. This agreement supports the robustness of our results, despite the increase in mass-to-light ratio with total galaxy mass: M(eff) proportional to L(V,eff)(1.363 +/- 0.056). We conclude that massive ETGs are structurally close to homologous with close to isothermal total density profiles (less than or similar to 10% intrinsic scatter) and have at most some mild radial anisotropy. Our results provide new observational limits on galaxy formation and evolution scenarios, covering 4 Gyr look-back time.

AB - Based on 58 SLACS strong-lens early-type galaxies (ETGs) with direct total-mass and stellar-velocity dispersion measurements, we find that inside one effective radius maassive elliptical galaxies with M(eff) greater than or similar to 3 x 10(10) M(circle dot.) are well approximated by a power-law ellipsoid, with an average logarithmic density slope of equivalent to -d log(rho(tot))/d log(r) = 2.085(-0.018)(+0.025) and sigma(gamma') less than or similar to 0.20(-0.02)(+0.04) (random error on mean) for isotropic orbits with beta(r) = 0, +/- 0.1 (syst.) intrinsic scatter (all errors indicate the 68% CL). We find no correlation of gamma'(LD) with galaxy mass (M(eff)), rescaled radius (i.e., R(einst)/R(eff)) or redshift, despite intrinsic differences in density-slope between galaxies. Based on scaling relations, the average logarithmic density slope can be derived in an alternative manner, fully independent from dynamics, yielding = 1.959 +/- 0.077. Agreement between the two values is reached for = 0.45 +/- 0.25, consistent with mild radial anisotropy. This agreement supports the robustness of our results, despite the increase in mass-to-light ratio with total galaxy mass: M(eff) proportional to L(V,eff)(1.363 +/- 0.056). We conclude that massive ETGs are structurally close to homologous with close to isothermal total density profiles (less than or similar to 10% intrinsic scatter) and have at most some mild radial anisotropy. Our results provide new observational limits on galaxy formation and evolution scenarios, covering 4 Gyr look-back time.

KW - galaxies: structure

KW - gravitational lensing

KW - LENS ACS SURVEY

KW - ABSOLUTE MAGNITUDE RELATION

KW - SUPERMASSIVE BLACK-HOLES

KW - COLD DARK MATTER

KW - ELLIPTIC GALAXIES

KW - FUNDAMENTAL PLANE

KW - SPHERICAL GALAXIES

KW - GRAVITATIONAL LENSES

KW - INTERNAL STRUCTURE

KW - SAURON PROJECT

U2 - 10.1088/0004-637X/703/1/L51

DO - 10.1088/0004-637X/703/1/L51

M3 - Article

VL - 703

SP - L51-L54

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

SN - 2041-8205

IS - 1

ER -

ID: 4951133