2012A&A...540A..90B


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.23CEST10:59:44

2012A&A...540A..90B - Astronomy and Astrophysics, volume 540A, 90-90 (2012/4-1)

Environmental effects on the bright end of the galaxy luminosity function in galaxy clusters.

BARRENA R., GIRARDI M., BOSCHIN W. and MARDIROSSIAN F.

Abstract (from CDS):

The dependence of the luminosity function (LF) of cluster galaxies on the evolutionary state of the parent cluster is still an open question, in particular concerning the formation/evolution of the brightest cluster galaxies. We study the bright part of the LFs of a sample of very unrelaxed clusters (``DARC'' clusters showing evidence of major, recent mergers) and compare them to a reference sample of relaxed clusters that span a comparable mass and redshift range. Our analysis is based on the SDSS DR7 photometric data of ten massive and X-ray luminous clusters (0.2≲z≲0.3), always considering physical radii (R200 or its fractions). We considered r' band LFs and used the color-magnitude diagrams (r'-i', r') to clean our samples to consider red and blue galaxies separately.We find that DARC and relaxed clusters give similar LF parameters and blue fractions. The two samples differ in their content of bright galaxies BGs, Mr'←22.5. Relaxed clusters have fewer BGs, in particular when considering the outer cluster region 0.5R200<R<R200 (by a factor two). However, the cumulative light in BGs is similar for relaxed and DARC samples.We conclude that BGs grow in luminosity and decrease in number as the parent clusters grow hierarchically, which agrees with a BG formation by merging with other luminous galaxies.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - galaxies: luminosity function, mass function - cosmology: observations

CDS comments: Table 1 notes : subclumps VN not in Simbad.

Simbad objects: 14

goto Full paper

goto View the reference in ADS

Number of rows : 14

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 ACO 209 ClG 01 31 57.5 -13 34 35           ~ 240 0
2 ACO 383 ClG 02 48 06.9 -03 29 32           ~ 290 0
3 ACO 611 ClG 08 00 58.7 +36 02 49           ~ 213 0
4 ACO 697 ClG 08 42 57.6 +36 21 45           ~ 206 0
5 ACO 773 ClG 09 17 51.3 +51 43 20           ~ 255 0
6 ACO 963 ClG 10 17 09.6 +39 01 00           ~ 344 0
7 ACO 959 ClG 10 17 35.0 +59 33 28           ~ 60 0
8 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6       ~ 240 0
9 ACO 1240 ClG 11 23 32 +43 06.5           ~ 71 0
10 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 975 1
11 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4096 2
12 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 611 1
13 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 309 0
14 ACO 2261 ClG 17 22 28.3 +32 09 13           ~ 272 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2012A&A...540A..90B and select 'bookmark this link' or equivalent in the popup menu


2019.10.23-10:59:44

© Université de Strasbourg/CNRS

    • Contact