2016A&A...595A..73B


Query : 2016A&A...595A..73B

2016A&A...595A..73B - Astronomy and Astrophysics, volume 595A, 73-73 (2016/11-1)

Velocity segregation effects in galaxy clusters at 0.4 ≤ z ≤ 1.5.

BARSANTI S., GIRARDI M., BIVIANO A., BORGANI S., ANNUNZIATELLA M. and NONINO M.

Abstract (from CDS):

Aims. Our study is meant to extend our knowledge of the galaxy color and luminosity segregation in velocity space (VCS and VLS, respectively), to clusters at intermediate and high redshift.
Methods. Our sample is a collection of 41 clusters in the 0.4≤z≤1.5 redshift range for a total of 4172 galaxies, 1674 of which are member galaxies of the clusters within 2R200 with photometric or spectroscopic information, as taken from the literature. We perform homogeneous procedures to select cluster members, compute global cluster properties, in particular the line-of-sight (LOS) velocity dispersion σV, and separate blue from red galaxies.
Results. We find evidence of VCS in clusters out to z~=0.8 (at the 97-99.99% confidence level, depending on the test), in the sense that the blue galaxy population has a 10-20% larger σV than the red galaxy population. Poor or no VCS is found in the high-z sample at z≥0.8. For the first time, we detect VLS in non-local clusters and confirm that VLS only affects the very luminous galaxies; brighter galaxies have lower velocities. The threshold magnitude of VLS is ∼m3+0.5, where m3 is the magnitude of the third brightest cluster galaxy. Current data suggest that the threshold value moves to fainter magnitudes at higher redshift. We also detect (marginal) evidence of VLS for blue galaxies.
Conclusions. We conclude that segregation effects can be important tracers of the galaxy evolution and cluster assembly when they are studied up to distant clusters. We also discuss the evidence of VCS at high redshift, which is poor or absent.

Abstract Copyright: © ESO, 2016

Journal keyword(s): galaxies: clusters: general - galaxies: kinematics and dynamics - galaxies: evolution - cosmology: observations

Simbad objects: 38

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Number of rows : 38
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 ClG 0016+16 ClG 00 18 33.3 +16 26 36           ~ 481 0
2 ZwCl 0024+1652 ClG 00 26 36.0 +17 08 36     18.35     ~ 611 1
3 ClG J0152-1358 ClG 01 52 41.3 -13 58 13           ~ 245 3
4 2E 714 SCG 03 05 19.0 +17 28 38     21.00     ~ 55 0
5 ClG 0303+1658 ClG 03 05 31.6 +17 10 02     20.13     ~ 90 0
6 ClG 0303+17 ClG 03 06 19.0 +17 18 50           ~ 49 0
7 ClG 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 334 0
8 ClG J0910+5422 ClG 09 10 44.9 +54 22 09           ~ 87 0
9 ACO 851 ClG 09 42 56.6 +46 59 22           ~ 311 0
10 ClG J1018-1211 ClG 10 18 46.45 -12 11 52.8     20.35     ~ 30 0
11 ClG J1037-1243 ClG 10 37 52.6 -12 43 44           ~ 39 0
12 ClG J1040-1155 ClG 10 40 41.6 -11 55 51           ~ 55 0
13 ClG J1054-1146 ClG 10 54 24.2 -11 46 18           ~ 51 0
14 ClG J1054-1245 ClG 10 54 43.5 -12 45 50           ~ 54 0
15 ClG 1054-03 ClG 10 57 00.2 -03 37 27     22     ~ 451 0
16 ClG J1059-1253 ClG 10 59 09.5 -12 53 15           ~ 27 0
17 ClG J1103-1246 ClG 11 03 34.9 -12 46 46           ~ 20 0
18 ClG J1103-1245 ClG 11 03 42.9 -12 45 18           ~ 16 1
19 2XMM J111725.8+074337 ClG 11 17 26.1 +07 43 35           ~ 30 0
20 ClG J1138-1133 ClG 11 38 10.3 -11 33 59           ~ 44 0
21 ClG J1216-1201 ClG 12 16 45.10 -12 01 17.3           ~ 66 0
22 ClG J1226+3332 ClG 12 26 57.7 +33 32 50           ~ 198 0
23 XDCP J1230.3+1339 ClG 12 30.3 +13 39           ~ 16 0
24 ClG J1232-1250 ClG 12 32 30.5 -12 50 33           ~ 50 0
25 ClG J1252-2927 ClG 12 52 54.4 -29 27 17           ~ 151 0
26 ClG J1301-1139 ClG 13 01.7 -11 39           ~ 13 0
27 ClG 1322+3027 ClG 13 24 48.2 +30 11 34           ~ 66 0
28 ClG J1353-1137 ClG 13 53 01.0 -11 37 31           ~ 27 0
29 ClG J1354-1230 ClG 13 54 09.5 -12 30 59           ~ 46 0
30 ClG J1411-1148 ClG 14 11 03.9 -11 48 22           ~ 28 0
31 3C 295 Sy2 14 11 20.467 +52 12 09.52   22.34 20.80 18.54   ~ 919 5
32 ClG 1601+42 ClG 16 03 13.800 +42 45 36.00           ~ 48 0
33 ClG 1603+4313 ClG 16 04 23.7 +43 04 52           ~ 130 1
34 ClG 1602.9+4329 ClG 16 04 35.3 +43 21 02           ~ 50 1
35 ClG 1621+26 ClG 16 23 35.7 +26 33 50           G0V 136 0
36 ClG J1716+6708 ClG 17 16 49.6 +67 08 30           ~ 133 0
37 ClG J2215-1738 ClG 22 15 58.5 -17 38 03           ~ 93 0
38 ClG J2235-2557 ClG 22 35 20.6 -25 57 42           ~ 140 0

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2021.07.31-10:59:39

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