2020MNRAS.491.2617E

Query : 2020MNRAS.491.2617E

2020MNRAS.491.2617E - Mon. Not. R. Astron. Soc., 491, 2617-2638 (2020/January-2)

Clocking the formation of today's largest galaxies: wide field integral spectroscopy of brightest cluster galaxies and their surroundings.

EDWARDS L.O.V., SALINAS M., STANLEY S., HOLGUIN WEST P.E., TRIERWEILER I., ALPERT H., COELHO P., KOPPAKA S., TREMBLAY G.R., MARTEL H. and LI Y.

Abstract (from CDS):

The formation and evolution of local brightest cluster galaxies (BCGs) is investigated by determining the stellar populations and dynamics from the galaxy core, through the outskirts and into the intracluster light (ICL). Integral spectroscopy of 23 BCGs observed out to 4 re is collected and high signal-to-noise regions are identified. Stellar population synthesis codes are used to determine the age, metallicity, velocity, and velocity dispersion of stars within each region. The ICL spectra are best modelled with populations that are younger and less metal-rich than those of the BCG cores. The average BCG core age of the sample is 13.3± 2.8 Gyr and the average metallicity is [Fe/H] = 0.30± 0.09, whereas for the ICL the average age is 9.2± 3.5 Gyr and the average metallicity is [Fe/H] = 0.18± 0.16. The velocity dispersion profile is seen to be rising or flat in most of the sample (17/23), and those with rising values reach the value of the host cluster's velocity dispersion in several cases. The most extended BCGs are closest to the peak of the cluster's X-ray luminosity. The results are consistent with the idea that the BCG cores and inner regions formed quickly and long ago, with the outer regions and ICL forming more recently, and continuing to assemble through minor merging. Any recent star formation in the BCGs is a minor component, and is associated with the cluster cool core status.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: clusters: general - galaxies: elliptical and lenticular - cD - galaxies: evolution - galaxies: interactions - galaxies: stellar content

Simbad objects: 53

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Number of rows : 53
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 MCG+03-02-021 rG 00 39 42.3936890328 +21 14 05.828281188   16       ~ 14 0
2 ACO 75 ClG 00 39 50 +21 15.5           ~ 38 0
3 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 974 0
4 MCG-02-02-086 rG 00 41 50.45002 -09 18 11.4633   14 13.52 12.94   ~ 154 1
5 Z 436-12 LIN 01 12 59.579 +15 29 28.71     15.7     ~ 91 1
6 ACO 160 ClG 01 12 59.98 +15 30 05.3           ~ 181 0
7 ACO 193 ClG 01 25 07.3 +08 41 36           ~ 192 0
8 IC 1695 rG 01 25 07.645 +08 41 57.68   14.87       ~ 68 1
9 ACO 376 ClG 02 45 48 +36 51.6           B8.5 161 1
10 MCG+06-07-004 BiC 02 46 03.9460542576 +36 54 18.840411612   15.50       ~ 46 1
11 ACO 407 ClG 03 01 43.7 +35 49 48           ~ 113 0
12 LEDA 200208 rG 03 01 51.5121973056 +35 50 28.322416788           ~ 24 0
13 Z 262-19 BiC 07 40 58.2309667896 +55 25 37.870473828   14.2       ~ 52 1
14 ACO 602 ClG 07 53 23.51 +29 20 20.3           ~ 80 0
15 2MASX J07532661+2921341 BiC 07 53 26.5903625208 +29 21 34.034236596           ~ 19 1
16 IC 2378 BiC 08 28 31.64433 +30 25 52.7798   15.3       ~ 57 0
17 ACO 671 ClG 08 28 48.68 +30 27 07.0           ~ 168 0
18 ACO 757 ClG 09 12 57.79 +47 43 45.2           ~ 67 0
19 NVSS J091307+474230 rG 09 13 07.7349375192 +47 42 30.307365288           ~ 34 0
20 NGC 3099 LIN 10 02 36.5352336744 +32 42 24.230041668   15.4       ~ 37 0
21 ZwCl 0959+3257 ClG 10 02 42.16 +32 43 37.2           ~ 41 0
22 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 905 1
23 NGC 3311 EmG 10 36 42.821 -27 31 42.02   11.93 10.93 10.00 9.67 ~ 310 2
24 MKW 3 ClG 11 48 29 -03 10.7     14.88     ~ 52 1
25 M 49 Sy2 12 29 46.8 +08 00 01   13.21 12.17     ~ 2174 2
26 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
27 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
28 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
29 IC 4130 LIN 13 03 46.5967721784 +19 16 17.468252544   15.42 14.30     ~ 52 2
30 ACO 1668 ClG 13 04 00.60 +19 17 09.6           ~ 132 0
31 ACO 1795 ClG 13 48 47.4 +26 34 55           ~ 1330 0
32 Z 162-10 LIN 13 48 52.4892734448 +26 35 34.353002688   14.0       ~ 241 2
33 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
34 ACT-CL J1521.8+0742 ClG 15 21 48.8 +07 43 41     15.13     ~ 326 0
35 NGC 5920 LIN 15 21 51.870 +07 42 31.97   15.5       ~ 137 1
36 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
37 NGC 6166 Sy2 16 28 38.24470063 +39 33 04.2335319   12.78 11.78     ~ 793 2
38 ZwCl 1810+4949 ClG 18 11 00.1 +49 54 40     14.8     ~ 60 0
39 MCG+08-33-030 BiC 18 11 05.1659834232 +49 54 33.291585684   16       ~ 22 0
40 LEDA 3938837 G 21 13 54.6546363048 +02 33 49.186353096           ~ 8 0
41 Z 375-15 BiC 21 13 55.918 +02 33 55.39   15.1       ~ 67 1
42 ACO 2457 ClG 22 35 40.30 +01 31 33.6           ~ 139 0
43 2MASX J22354078+0129053 BiC 22 35 40.8012547920 +01 29 05.614773792   16.14 14.90     ~ 31 1
44 NGC 7647 BiC 23 23 57.4310112528 +16 46 38.141670936   14.61 14.45     ~ 79 0
45 ACO 2589 ClG 23 24 00.5 +16 49 29           ~ 327 1
46 ACO 2622 ClG 23 34 53 +27 25.6           ~ 93 0
47 4C 27.53A rG 23 35 01.4782510920 +27 22 20.679250476   15.28       ~ 50 1
48 IC 5338 rG 23 36 30.6135053136 +21 08 50.535313476   15.5       ~ 92 2
49 ACO 2626 ClG 23 36 31.0 +21 09 36           ~ 265 0
50 ACO 2634 ClG 23 38 18.4 +27 01 37           ~ 515 2
51 NGC 7720 Sy1 23 38 29.38324020 +27 01 53.2580084   13.9 13.3     ~ 565 4
52 MCG+01-60-039 rG 23 50 50.5592379024 +06 08 58.563049920   15       ~ 36 1
53 ACO 2665 ClG 23 50 50.6 +06 09 00           ~ 106 0

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