2012MNRAS.422.2841J


Query : 2012MNRAS.422.2841J

2012MNRAS.422.2841J - Mon. Not. R. Astron. Soc., 422, 2841-2853 (2012/June-1)

Red sequence modal colour gradients across intermediate X-ray luminosity galaxy clusters.

JENSEN P.C. and PIMBBLET K.A.

Abstract (from CDS):

We assemble a sample of 45 intermediate X-ray luminosity galaxy clusters ({img} erg/s) at low redshifts (0.03 < z < 0.16) using Sloan Digital Sky Survey (SDSS) data to conduct a comprehensive investigation into the photometric variation of red sequence modal galaxy colours with environment. The clusters span a range of Bautz-Morgan types and evolutionary stages and are shown to be representative of the global underlying intermediate LX cluster sample. We define cluster membership using SDSS spectroscopic data and characterize the clusters by deriving new recession velocities, velocity dispersions and other parameters for each. We construct colour-magnitude diagrams for each of these clusters and obtain the position of the red sequence using a robust line fitting algorithm with a Lorentzian merit function. In doing so, we describe a population of discordant points on the colour-magnitude plane which are the result of photometric blending, dust and other causes. By fitting the clusters with Schechter functions to derive M* values in each SDSS passband, we combine the red sequence of the galaxy clusters together to form a composite sample. We detail how the modal colour value of the red sequence varies with radius from the centre of this composite cluster and local galaxy density for all SDSS colours. In agreement with previous studies, these colours are shown to systematically move blueward with increasing distance from the cluster centres, or equivalently lower local galaxy density, whilst the width of the red sequence increases. This supports the idea that the galaxies at the outskirts of these clusters have younger luminosity-weighted ages than those at the core indicating that their star formation has been quenched more recently than in the core. A comparison of our derived gradients in (g-r) (explicitly, {img} and d(g-r)/dlog (Σ) = 0.012±0.002) with earlier works tentatively suggests that these gradients vary redshift which would reflect the hierarchical build-up of the red sequence over time.

Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society2012 RAS

Journal keyword(s): galaxies: clusters: general - galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: luminosity function, mass function - galaxies: stellar content

Simbad objects: 47

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Number of rows : 47
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 ACO 602 ClG 07 53 24.2 +29 21 58           ~ 67 0
2 ZwCl 0755+5408 ClG 07 59 42.8 +54 00 06           ~ 20 0
3 RX J0821.0+0752 ClG 08 21 02.4 +07 51 47           ~ 57 1
4 ACO 671 ClG 08 28 31.97 +30 24 19.7           ~ 153 0
5 ACO 743 ClG 09 06 42 +10 16.9           ~ 20 0
6 ACO 744 ClG 09 07 20.0 +16 39 25           ~ 76 0
7 ACO 763 ClG 09 12 30.7 +15 55 28           ~ 44 0
8 ACO 757 ClG 09 12 57.79 +47 43 45.2           ~ 62 0
9 MCXC J1000.5+4409 ClG 10 00 30.5 +44 09 15           ~ 30 0
10 ACO 923 ClG 10 06 31 +25 54.4           ~ 28 0
11 ACO 957 ClG 10 13 38.42 -00 55 32.6           ~ 200 2
12 ACO 961 ClG 10 16 29.5 +33 37 01           ~ 39 0
13 ACO 971 ClG 10 19 52.08 +40 59 18.4           ~ 45 0
14 ACO 1035 ClG 10 32 07.51 +40 15 49.2           ~ 82 0
15 ACO 1045 ClG 10 34 59.5 +30 41 39           ~ 36 0
16 MCXC J1053.7+5452 ClG 10 53 44.4 +54 52 21           ~ 43 0
17 ACO 1126 ClG 10 53 48.3 +16 50 25           ~ 91 0
18 ACO 1361 ClG 11 43 39.6 +46 21 20           ~ 87 0
19 ACO 1446 ClG 12 02 03.8 +58 02 08           ~ 92 1
20 ZwCl 1207+0542 ClG 12 10 16.8 +05 23 08           ~ 31 0
21 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4527 2
22 ACO 1691 ClG 13 11 11.14 +39 16 38.4           ~ 93 0
23 ACO 1728 ClG 13 23 30.20 +11 17 45.6           ~ 24 0
24 ACO 1767 ClG 13 36 08.33 +59 12 23.0           ~ 162 0
25 ACO 1773 ClG 13 42 11.73 +02 13 28.2           ~ 109 0
26 ACO 1809 ClG 13 53 03.72 +05 08 17.7           ~ 160 0
27 ACO 1814 ClG 13 54 02.9 +14 54 40           ~ 23 0
28 ACO 1831 ClG 13 59 10.2 +27 59 28           ~ 142 0
29 ACO 1885 ClG 14 13 43.73 +43 39 45.0           ~ 62 0
30 ACO 1907 ClG 14 21 35.83 +49 33 04.4           ~ 26 0
31 RBS 1385 ClG 14 23 53.6 +40 15 33           ~ 18 0
32 ACO 1925 ClG 14 28 26.000 +56 51 36.00           ~ 35 0
33 ACO 1927 ClG 14 31 06.2 +25 38 15           ~ 93 0
34 PBC J1442.3+2218 ClG 14 42 18.9 +22 18 20           ~ 21 0
35 ACO 2033 ClG 15 11 23.50 +06 19 08.4           ~ 91 0
36 ACO 2110 ClG 15 39 40.38 +30 43 16.1           ~ 71 0
37 ACO 2108 ClG 15 40 09.10 +17 52 40.8           ~ 40 0
38 ACO 2124 ClG 15 44 59.3 +36 03 40           ~ 198 0
39 ACO 2141 ClG 15 57 46 +35 27.5           ~ 37 0
40 ACO 2149 ClG 16 01 22.97 +53 51 59.1           ~ 68 0
41 ACO 2148 ClG 16 03 02.20 +25 24 14.4           ~ 55 0
42 ACO 2175 ClG 16 20 30.70 +29 53 31.2           ~ 102 0
43 ACO 2199 ClG 16 28 37.0 +39 31 28           ~ 1131 1
44 ACO 2228 ClG 16 47 45 +29 55.8           ~ 20 0
45 RX J1652.6+4011 ClG 16 52 40 +40 11.6           ~ 6 0
46 SDSS-C4 3051 GrG 17 18 11.6 +56 40 09           ~ 45 1
47 ACO 2370 ClG 21 44 55.9 -19 29 22           ~ 10 0

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2022.08.10-06:44:11

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