2009A&A...504..769C


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.27CET23:52:59

2009A&A...504..769C - Astronomy and Astrophysics, volume 504, 769-788 (2009/9-4)

The global mass-to-light ratio of SLACS lenses.

CARDONE V.F., TORTORA C., MOLINARO R. and SALZANO V.

Abstract (from CDS):

The dark matter content of early-type galaxies (ETGs) is a hotly debated topic with contrasting results arguing in favour of or against the presence of significant dark mass within the effective radius and the change with luminosity and mass. To address this question, we investigate here the global mass-to-light ratio Υ(r)=M(r)/L(r) of a sample of 21 lenses observed within the Sloan Lens ACS (SLACS) survey. We follow the usual approach of the galaxy as a two component systems, but we use a phenomenological ansatz for Υ(r), proposed by some of us, that is able to smoothly interpolate between constant M/L models and a wide class of dark matter haloes. The resulting galaxy model is then fitted to the data on the Einstein radius and aperture velocity dispersion. Our phenomenological model turns out to agree with the data suggesting the presence of massive dark matter haloes to explain the lensing and dynamics properties of the SLACS lenses. According to the values of the dark matter mass fraction, we argue that the halo may play a significant role in the inner regions probed by the data, but such a conclusion strongly depends on the adopted initial mass function of the stellar population. Finally, we find that the dark matter mass fraction within Reff scales with both the total luminosity and stellar mass in such a way that more luminous (and hence more massive) galaxies have a greater dark matter content.

Abstract Copyright:

Journal keyword(s): galaxies: kinematics and dynamics - galaxies: fundamental parameters - galaxies: elliptical and lenticular, Cd - gravitational lensing - cosmology: dark matter

Simbad objects: 25

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Number of rows : 25

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 SDSS J002907.77-005550.5 G 00 29 07.779 -00 55 50.54     17.74   17.09 ~ 10 1
2 [WHL96] 0047-2808 Einstein Ring LeI 00 49 41.86 -27 52 25.7           ~ 28 1
3 SDSS J015758.93-005626.0 G 01 57 58.936 -00 56 26.05     19.87   18.64 ~ 7 1
4 DES J021652.54-081345.3 GiC 02 16 52.544 -08 13 45.34   19.91 18.36   16.93 ~ 23 1
5 SDSSCGB 42069.2 GiG 02 52 45.216 +00 39 58.35     18.77   18.04 ~ 13 1
6 SDSS J033012.13-002051.8 G 03 30 12.134 -00 20 51.88     18.84   18.16 ~ 11 1
7 SDSS J072804.95+383525.7 G 07 28 04.956 +38 35 25.71     17.38   16.74 ~ 11 1
8 2MASX J08085880+4706389 G 08 08 58.806 +47 06 39.00     17.11   16.74 ~ 7 1
9 SLACS SDSS J0903+4116 lens BiC 09 03 15.186 +41 16 09.14     18.90   17.95 ~ 8 1
10 3XMM J091205.4+002900 LIN 09 12 05.308 +00 29 01.19   17.91 16.56   15.57 ~ 29 1
11 SDSS J095944.06+041017.0 G 09 59 44.067 +04 10 17.02   19.14 17.94   16.92 ~ 22 1
12 SDSS J102332.24+423001.8 G 10 23 32.246 +42 30 01.85     17.45   16.77 ~ 10 0
13 SDSS J110308.20+532227.9 G 11 03 08.208 +53 22 27.93     17.14   16.43 ~ 11 1
14 2MASX J12054040+4910297 rG 12 05 40.413 +49 10 29.16   19.19 17.70   16.56 ~ 17 2
15 SDSS J125028.26+052349.0 G 12 50 28.260 +05 23 49.08   19.19 17.77   16.70 ~ 20 1
16 NGC 4807 GiP 12 55 29.077 +27 31 16.91   14.50 13.50     ~ 97 1
17 SDSS J140228.21+632133.4 rG 14 02 28.217 +63 21 33.40   19.07 17.51   16.33 ~ 27 1
18 2MASX J14201586+6019147 Sy2 14 20 15.849 +60 19 14.56   16.88 15.94   15.08 ~ 18 1
19 NVSS J160914+653229 rG 16 09 13.96 +65 32 28.8     19.4     ~ 193 1
20 SDSS J162746.44-005357.5 G 16 27 46.447 -00 53 57.56   19.42 17.87   16.91 ~ 25 1
21 SDSS J163028.15+452036.2 G 16 30 28.158 +45 20 36.27   19.76 18.08   16.79 ~ 22 1
22 SDSS J223840.20-075456.0 G 22 38 40.202 -07 54 56.04   18.21 17.18   16.20 ~ 13 1
23 SDSS J230053.14+002238.0 G 23 00 53.144 +00 22 38.05   19.80 18.19   17.07 ~ 24 1
24 SDSS J230321.72+142217.9 G 23 03 21.726 +14 22 17.92   17.96 16.77   16.10 ~ 23 1
25 SDSS J234111.57+000018.5 G 23 41 11.572 +00 00 18.59     17.02   16.36 ~ 10 1

    Equat.    Gal    SGal    Ecl

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2020.11.27-23:52:59

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