2018MNRAS.481..981H


Query : 2018MNRAS.481..981H

2018MNRAS.481..981H - Mon. Not. R. Astron. Soc., 481, 981-999 (2018/November-3)

Dwarf galaxies and cluster environments.

HASHIMOTO Y., HENRY J.P. and BOEHRINGER H.

Abstract (from CDS):

We report an investigation of the dwarf galaxies (Mr < -15) inside 26 clusters at z = 0.15-0.25, using optical images taken with Subaru Suprime-Cam and the X-ray data from the Chandra. Our goal is to help understand the relationship between the dwarf and giant galaxies, and the dwarfs and their host clusters, to eventually address a question of the co-evolution of galaxies and their environments. When we examine dwarf-to-giant ratios as a function of cluster density or X-ray luminosity, we find no variation in the ratios. We also find that: (1) the investigation of the dwarf galaxy density distribution is very sensitive to the background galaxies and the colour of galaxies; (2) underestimating the background galaxy counts tends to mimic a 'flat' distribution of dwarf galaxies over cluster-centric distance; (3) approximately 40-60 per cent of faint galaxies remain undetected by the detection algorithm near the centre of clusters, even after carefully treating the diffuse light by nearby bright galaxies; (4) dwarf galaxies extend up to 2 Mpc from the centre in most clusters. The blue dwarf galaxies (more than 0.3 bluer than cluster red sequence V - I colour) extend to larger cluster-centric radii compared to the red dwarf galaxies; (5) the major contribution to the difference in the radial distribution comes from the colour, rather than the size, of galaxies; (6) relative to the NFW profile, all of the galaxy populations are showing a deficit near the cluster core (r < 0.3 Mpc). The deviation is the most significant for blue dwarf galaxies.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: clusters: general - galaxies: dwarf - galaxies: evolution - X-rays: galaxies: clusters

Simbad objects: 27

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Number of rows : 27
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 ACO 68 ClG 00 37 06.2 +09 09 33           ~ 167 0
2 ACO 115 ClG 00 55 59.5 +26 19 14           ~ 243 1
3 ACO 267 ClG 01 52 41.96 +01 00 25.6           ~ 207 0
4 ACO 520 ClG 04 54 19.0 +02 56 49           ~ 396 0
5 ZwCl 0839+2937 ClG 08 42 55.9 +29 27 52     17.0     ~ 82 0
6 RBS 745 ClG 09 09 06.7 +11 01 48           ~ 133 1
7 ACO 773 ClG 09 17 51.3 +51 43 20           ~ 268 0
8 ZwCl 0949+5207 ClG 09 52 49.1 +51 53 05           ~ 118 0
9 ACO 1204 ClG 11 13 32.2 +17 35 40           ~ 85 0
10 ACO 1413 ClG 11 55 18.0 +23 24 19           ~ 390 0
11 ACO 1423 ClG 11 57 47.34 +33 42 43.5           ~ 149 0
12 ZwCl 1231+1007 ClG 12 34 21.9 +09 47 02           ~ 59 0
13 ACO 1682 ClG 13 06 49.7 +46 32 59           ~ 122 1
14 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1047 0
15 ACO 1763 ClG 13 35 20.1 +41 00 04           ~ 275 0
16 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 644 1
17 ACO 2111 ClG 15 39 40.9 +34 25 04           ~ 163 0
18 ACO 2151 ClG 16 05 15.0 +17 44 55           ~ 561 3
19 ACO 2204 ClG 16 32 45.7 +05 34 43           ~ 407 0
20 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 784 1
21 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 329 0
22 ACO 2259 ClG 17 20 09.2 +27 40 09           ~ 103 0
23 ClG J1720+2638 ClG 17 20 09.6 +26 37 35           ~ 215 0
24 ACO 2261 ClG 17 22 28.3 +32 09 13           ~ 303 0
25 ClG J2129+0005 ClG 21 29 40.5 +00 05 47           ~ 230 0
26 ACO 2390 ClG 21 53 34.6 +17 40 11           ~ 641 2
27 NAME Local Group GrG ~ ~           ~ 7319 0

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2021.08.02-14:19:30

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