2018ApJ...857..122C

Query : 2018ApJ...857..122C

2018ApJ...857..122C - Astrophys. J., 857, 122-122 (2018/April-3)

Stellar mass and 3.4 µm M/L ratio evolution of brightest cluster galaxies in COSMOS since z ∼ 1.0.

COOKE K.C., FOGARTY K., KARTALTEPE J.S., MOUSTAKAS J., O'DEA C.P. and POSTMAN M.

Abstract (from CDS):

We investigate the evolution of star formation rates (SFRs), stellar masses, and M/L_3.4 µm_ ratios of brightest cluster galaxies (BCGs) in the COSMOS survey since z ∼ 1 to determine the contribution of star formation to the growth-rate of BCG stellar mass over time. Through the spectral energy density (SED) fitting of the GALEX, CFHT, Subaru, Vista, Spitzer, and Herschel photometric data available in the COSMOS2015 catalog, we estimate the stellar mass and SFR of each BCG. We use a modified version of the iSEDfit package to fit the SEDs of our sample with both stellar and dust emission models, as well as constrain the impact of star formation history assumptions on our results. We find that in our sample of COSMOS BCGs, star formation evolves similarly to that in BCGs in samples of more massive galaxy clusters. However, compared to the latter, the magnitude of star formation in our sample is lower by ∼1 dex. Additionally, we find an evolution of BCG baryonic mass-to-light ratio (M/L_3.4 µm_) with redshift which is consistent with a passively aging stellar population. We use this to build upon Wen et al.'s low-redshift νL_3.4 µm–MStellar_ relation, quantifying a correlation between νL_3.4 µm_ and MStellar to z ∼ 1. By comparing our results to BCGs in Sunyaev-Zel'dovich and X-ray-selected samples of galaxy clusters, we find evidence that the normalization of star formation evolution in a cluster sample is driven by the mass range of the sample and may be biased upwards by cool cores.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: clusters: general - galaxies: elliptical and lenticular, cD - galaxies: star formation

Simbad objects: 45

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Number of rows : 45
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 [GFT2019] Group 30042 GrG 09 58 05.58 +01 52 34.1           ~ 3 0
2 XCLASS 1888 GrG 09 58 23.94 +02 49 11.7           ~ 16 0
3 [AFH2012] 174 GrG 09 58 34.99 +02 20 50.0           ~ 4 0
4 [AFH2012] 194 GrG 09 58 47.90 +02 24 10.1           ~ 3 0
5 2XMMi J095901.4+024737 GrG 09 59 01.86 +02 47 32.0           ~ 9 0
6 [GFT2019] Group 30185 GrG 09 59 07.2 +02 23 58           ~ 3 0
7 XCLASS 2162 GrG 09 59 24.91 +01 46 09.7           ~ 11 0
8 2XMMi J095931.5+022701 GrG 09 59 31.61 +02 26 55.6           ~ 7 0
9 CDGS 47 GrG 09 59 40.70 +02 31 06.1           ~ 24 0
10 [FGH2007] 105 GrG 09 59 40.77 +02 36 07.1           ~ 5 0
11 [GFT2019] Group 30311 GrG 09 59 45.29 +02 36 21.1           ~ 3 0
12 XCLASS 2163 GrG 09 59 51.54 +01 40 46.5           ~ 19 0
13 [GLB2011] COSMOS CL J095957.1+023506 GrG 09 59 57.60 +02 35 08.7           ~ 3 0
14 XCLASS 1886 GrG 10 00 05.72 +02 12 11.5           ~ 11 0
15 [AFH2012] 231 GrG 10 00 13.01 +02 35 19.9           ~ 4 0
16 [AFH2012] 124 GrG 10 00 13.57 +02 12 30.6           ~ 4 0
17 XCLASS 1879 GrG 10 00 13.925 +02 22 48.00           ~ 8 0
18 [AFH2012] 216 GrG 10 00 15.99 +02 38 50.6           ~ 3 0
19 [GFT2019] Group 10281 GrG 10 00 21.21 +02 31 54.3           ~ 3 0
20 XCLASS 1880 GrG 10 00 22.14 +02 23 34.7           ~ 12 0
21 XMMXCS J100027.1+022131.7 GrG 10 00 26.9 +02 21 23           ~ 6 0
22 [AFH2012] 289 GrG 10 00 27.22 +02 33 13.7           ~ 6 0
23 XCLASS 1877 GrG 10 00 28.07 +02 41 25.1           ~ 15 0
24 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 3639 0
25 [GLB2011] COSMOS CL J100031.5+015108 GrG 10 00 31.5 +01 51 08           ~ 2 0
26 [GFT2019] Group 20080 GrG 10 00 35.55 +02 03 46.7           ~ 3 0
27 CDGS 15 GrG 10 00 43.71 +01 46 11.4           ~ 16 0
28 CXOU J100047.6+013940 GrG 10 00 47.43 +01 39 30.5           ~ 9 0
29 [GFT2019] Group 20035 GrG 10 00 50.41 +01 49 12.1           ~ 4 0
30 [GLB2011] COSMOS CL J100051.5+021648 GrG 10 00 52 +02 16.8           ~ 5 0
31 [GLB2011] COSMOS CL J100056.0+022834 GrG 10 00 56.0 +02 28 34           ~ 2 0
32 [GLB2011] COSMOS CL J100056.8+021225 GrG 10 00 56.65 +02 12 31.1           ~ 3 0
33 [AFH2012] 142 GrG 10 01 10.06 +02 16 49.0           ~ 3 0
34 [GFT2019] Group 20024 GrG 10 01 10.27 +01 41 21.7           ~ 3 0
35 [GFT2019] Group 20071 GrG 10 01 27.76 +02 00 09.1           ~ 8 0
36 [GLB2011] COSMOS CL J100135.3+024617 GrG 10 01 35.3 +02 46 17           ~ 2 0
37 [GFT2019] Group 10226 GrG 10 01 37.77 +02 34 58.0           ~ 4 0
38 [GFT2019] Group 30304 GrG 10 01 39.2 +02 24 35           ~ 3 0
39 [GFT2019] Group 10040 GrG 10 01 39.63 +01 51 00.4           ~ 7 0
40 [FGH2007] 44 GrG 10 01 41.10 +01 59 02.3           ~ 4 0
41 CDGS 3 GrG 10 01 42.66 +02 25 49.9           ~ 16 0
42 [AFH2012] 79 GrG 10 01 46.78 +02 03 12.5           ~ 4 0
43 [GLB2011] COSMOS CL J100200.6+020405 GrG 10 02 00.6 +02 04 05           ~ 2 0
44 CDGS 54 GrG 10 02 01.47 +02 13 29.6           ~ 19 0
45 [GLB2011] COSMOS CL J100217.7+015601 GrG 10 02 17.7 +01 56 01           ~ 2 0

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