2009A&A...498..615C


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.25CET16:06:30

2009A&A...498..615C - Astronomy and Astrophysics, volume 498, 615-626 (2009/5-1)

Total mass distributions of Sersic galaxies from photometry and central velocity dispersion.

CHAKRABARTY D. and JACKSON B.

Abstract (from CDS):

We develop a novel way of finding total mass density profiles in Sersic ellipticals, to about 3 times the major axis effective radius, using no other information other than what is typically available for distant galaxies, namely the observed surface brightness distribution and the central velocity dispersion σ0. The luminosity density profile of the observed galaxy is extracted by deprojecting the measured brightness distribution and scaling it by a fiduciary, step-function shaped, raw mass-to-light ratio profile (M/L). The resulting raw, discontinuous, total, 3-D mass density profile is then smoothed according to a proposed smoothing prescription. The parameters of this raw M/L are characterised by implementing the observables in a model-based study. The complete characterisation of the formalism is provided as a function of the measurements of the brightness distribution and σ0. The formalism, thus specified, is demonstrated to yield the mass density profiles of a suite of test galaxies and is successfully applied to extract the gravitational mass distribution in NGC 3379 and NGC 4499, out to about 3 effective radii.

Abstract Copyright:

Journal keyword(s): methods: data analysis - galaxies: fundamental parameters

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1392 0
2 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5979 0
3 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6348 3
4 NGC 4494 GiP 12 31 24.034 +25 46 29.93   10.55 9.74     ~ 454 0
5 NGC 4499 GiG 12 32 04.944 -39 58 56.83   13.58   12.20   ~ 33 0

    Equat.    Gal    SGal    Ecl

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2021.02.25-16:06:30

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