2013ApJ...777...98S

Query : 2013ApJ...777...98S

2013ApJ...777...98S - Astrophys. J., 777, 98 (2013/November-2)

The SL2S galaxy-scale lens sample. IV. The dependence of the total mass density profile of early-type galaxies on redshift, stellar mass, and size.

SONNENFELD A., TREU T., GAVAZZI R., SUYU S.H., MARSHALL P.J., AUGER M.W. and NIPOTI C.

Abstract (from CDS):

We present optical and near-infrared spectroscopy obtained at Keck, Very Large Telescope, and Gemini for a sample of 36 secure strong gravitational lens systems and 17 candidates identified as part of the Strong Lensing Legacy Survey. The deflectors are massive early-type galaxies in the redshift range zd= 0.2-0.8, while the lensed sources are at zs= 1-3.5. We combine these data with photometric and lensing measurements presented in the companion paper III and with lenses from the Sloan Lens Advanced Camera for Surveys and Lènses Structure and Dynamics surveys to investigate the cosmic evolution of the internal structure of massive early-type galaxies over half the age of the universe. We study the dependence of the slope of the total mass density profile, γ' (ρ(r) ∝ r–γ'), on stellar mass, size, and redshift. We find that two parameters are sufficient to determine γ' with less than 6% residual scatter. At fixed redshift, γ' depends solely on the surface stellar mass density ∂γ'/∂Σ*= 0.38±0.07, i.e., galaxies with denser stars also have steeper slopes. At fixed M* and Reff, γ' depends on redshift, in the sense that galaxies at a lower redshift have steeper slopes (∂γ'/∂z = -0.31±0.10). However, the mean redshift evolution of γ' for an individual galaxy is consistent with zero dγ'/dz = -0.10±0.12. This result is obtained by combining our measured dependencies of γ' on z, M*,Reff with the evolution of the Reff-M* taken from the literature, and is broadly consistent with current models of the formation and evolution of massive early-type galaxies. Detailed quantitative comparisons of our results with theory will provide qualitatively new information on the detailed physical processes at work.

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Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: evolution - gravitational lensing: strong

Simbad objects: 60

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Number of rows : 60
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SLACS SDSS J0029-0055 gLS 00 29 07.7777644104 -00 55 50.581964100           ~ 31 0
2 GAMA 1231004 gLe 02 08 33.10 -07 14 14.1           ~ 9 0
3 GAMA J021206.55-075528.1 gLe 02 12 06.56 -07 55 28.3           ~ 6 0
4 SL2S J021247-055552 gLe 02 12 47.0 -05 55 52           ~ 10 0
5 SL2S J021325-074355 gLe 02 13 24.520 -07 43 54.82           ~ 12 0
6 HSCS J021411-040502 gLe 02 14 11.240 -04 05 02.71         19.07 ~ 20 0
7 SDSS J021737.16-051329.5 rG 02 17 37.14752 -05 13 29.5242   23.372 22.054 21.102 19.12 ~ 51 0
8 SL2S J021801-080247 gLe 02 18 01.0 -08 02 47           ~ 8 0
9 SL2S J021902-082934 gLe 02 19 02.0 -08 29 34           ~ 14 0
10 SL2S J022046-094927 gLe 02 20 46.0 -09 49 27           ~ 6 0
11 SL2S J022056-063934 gLe 02 20 56.0 -06 39 34           ~ 6 0
12 SDSS J022346.15-053418.5 GiC 02 23 46.139 -05 34 18.44           ~ 13 0
13 GAMA J022357.94-065142.6 gLe 02 23 57.94 -06 51 42.8           ~ 7 0
14 FIRST J022511.0-045433 rG 02 25 11.0432107507 -04 54 33.577072969           ~ 21 2
15 SL2S J022610-042011 gLe 02 26 10.0 -04 20 11           ~ 17 0
16 SL2S J022648-040610 gLe 02 26 48.0 -04 06 10           ~ 9 0
17 SL2S J022648-090421 gLe 02 26 48.0 -09 04 21           ~ 6 0
18 GAMA J023251.57-040823.8 gLe 02 32 51.58 -04 08 23.9           ~ 17 0
19 SLACS SDSS J0737+3216 gLS 07 37 28.4499521544 +32 16 18.593106384           ~ 35 0
20 SLACS SDSS J0819+4534 gLS 08 19 31.9374253824 +45 34 44.839333092           ~ 12 0
21 SL2S J084847-035103 gLe 08 48 47.0 -03 51 03           ~ 10 0
22 SL2S J084909-041226 gLe 08 49 09.0 -04 12 26           ~ 13 0
23 SL2S J084934-043352 gLe 08 49 34.0 -04 33 52           ~ 4 0
24 SL2S J084959-025142 gLe 08 49 59.0 -02 51 42           ~ 11 0
25 SL2S J085019-034710 gLe 08 50 19.0 -03 47 10           ~ 7 0
26 SL2S J085327-023745 gLe 08 53 27.0 -02 37 45           ~ 3 0
27 SL2S J085540-014730 gLe 08 55 40.0 -01 47 30           ~ 10 0
28 SL2S J085559-040917 gLe 08 55 59.920 -04 09 17.76           ~ 7 0
29 SL2S J085826-014300 gLe 08 58 26.0 -01 43 00           ~ 4 0
30 SL2S J090106-025906 gLe 09 01 06.0 -02 59 06           ~ 6 0
31 SL2S J090407-005952 gLe 09 04 07.970 -00 59 52.85           ~ 15 0
32 SLACS SDSS J0935-0003 gLS 09 35 43.933 -00 03 34.78           ~ 24 0
33 SLACS SDSS J0946+1006 gLS 09 46 56.6809160256 +10 06 52.903093212           ~ 70 0
34 SL2S J095921+020638 gLe 09 59 21.0 +02 06 38           ~ 11 0
35 SLACS SDSS J1213+6708 gLS 12 13 40.5915613824 +67 08 28.748297688           ~ 29 0
36 SL2S J135847+545913 gLe 13 58 47.0 +54 59 13           ~ 6 0
37 SL2S J135949+553550 gLe 13 59 49.0 +55 35 50           ~ 11 0
38 SL2S J140123+555705 gLe 14 01 23.0 +55 57 05           ~ 6 0
39 SL2S J140156+554446 gLe 14 01 56.390 +55 44 46.78           ~ 7 0
40 SL2S J140221+550534 gLe 14 02 21.0 +55 05 34           ~ 4 0
41 SL2S J140454+520024 gLe 14 04 54.460 +52 00 24.70           ~ 10 0
42 SL2S J140546+524311 gLe 14 05 46.0 +52 43 11           ~ 11 0
43 SL2S J140614+520252 gLe 14 06 14.0 +52 02 52           ~ 6 0
44 SL2S J140650+522619 gLe 14 06 50.0 +52 26 19           ~ 12 0
45 SL2S J141137+565119 gLe 14 11 37.0 +56 51 19           ~ 15 0
46 SL2S J142003+523137 gLe 14 20 03.0 +52 31 37           ~ 4 0
47 [TCB2007] 13025503 AGN 14 20 31.89 +52 58 22.3   21.81   19.577 18.953 ~ 13 0
48 SL2S J142059+563007 gLe 14 20 59.0 +56 30 07           ~ 13 0
49 SL2S J142731+551645 gLe 14 27 31.0 +55 16 45           ~ 5 0
50 SLACS SDSS J1614+4522 gLS 16 14 37.7395990824 +45 22 53.329065672           ~ 10 0
51 SL2S J220329+020518 gLe 22 03 29.030 +02 05 18.89           ~ 15 0
52 HSCS J220506+014703 gLe 22 05 06.920 +01 47 03.71           ~ 13 0
53 SL2S J220629+005728 gLe 22 06 29.0 +00 57 28           ~ 6 0
54 SL2S J221326-000946 gLe 22 13 26.0 -00 09 46           ~ 12 0
55 SL2S J221407-180712 gLe 22 14 07.0 -18 07 12           ~ 6 0
56 SL2S J221852+014038 gLe 22 18 52.0 +01 40 38           ~ 4 0
57 SL2S J221929-001743 gLe 22 19 29.0 -00 17 43           ~ 9 0
58 SL2S J222012+010606 gLe 22 20 12.0 +01 06 06           ~ 6 0
59 SL2S J222148+011542 gLe 22 21 48.0 +01 15 42           ~ 12 0
60 SL2S J222217+001202 gLe 22 22 17.0 +00 12 02           ~ 6 0

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