2013ApJ...775..126H

Query : 2013ApJ...775..126H

2013ApJ...775..126H - Astrophys. J., 775, 126 (2013/October-1)

LoCuSS: the steady decline and slow quenching of star formation in cluster galaxies over the last four billion years.

HAINES C.P., PEREIRA M.J., SMITH G.P., EGAMI E., SANDERSON A.J.R., BABUL A., FINOGUENOV A., MERLUZZI P., BUSARELLO G., RAWLE T.D. and OKABE N.

Abstract (from CDS):

We present an analysis of the levels and evolution of star formation activity in a representative sample of 30 massive galaxy clusters at 0.15 < z < 0.30 from the Local Cluster Substructure Survey, combining wide-field Spitzer/MIPS 24 µm data with extensive spectroscopy of cluster members. The specific SFRs of massive (M ≳ 1010M☉) star-forming cluster galaxies within r 200 are found to be systematically ∼28% lower than their counterparts in the field at fixed stellar mass and redshift, a difference significant at the 8.7σ level. This is the unambiguous signature of star formation in most (and possibly all) massive star-forming galaxies being slowly quenched upon accretion into massive clusters, their star formation rates (SFRs) declining exponentially on quenching timescales in the range 0.7-2.0 Gyr. We measure the mid-infrared Butcher-Oemler effect over the redshift range 0.0-0.4, finding rapid evolution in the fraction (fSF) of massive (MK< - 23.1) cluster galaxies within r200 with SFRs > 3 M_☉/yr, of the form f SF∝(1 + z)7.6±1.1. We dissect the origins of the Butcher-Oemler effect, revealing it to be due to the combination of a ∼3xdecline in the mean specific SFRs of star-forming cluster galaxies since z ∼ 0.3 with a ∼1.5xdecrease in number density. Two-thirds of this reduction in the specific SFRs of star-forming cluster galaxies is due to the steady cosmic decline in the specific SFRs among those field galaxies accreted into the clusters. The remaining one-third reflects an accelerated decline in the star formation activity of galaxies within clusters. The slow quenching of star formation in cluster galaxies is consistent with a gradual shut down of star formation in infalling spiral galaxies as they interact with the intracluster medium via ram-pressure stripping or starvation mechanisms. The observed sharp decline in star formation activity among cluster galaxies since z ∼ 0.4 likely reflects the increased susceptibility of low-redshift spiral galaxies to gas removal mechanisms as their gas surface densities decrease with time. We find no evidence for the build-up of cluster S0 bulges via major nuclear starburst episodes.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: general - galaxies: evolution - galaxies: spiral

Simbad objects: 43

goto Full paper

goto View the references in ADS

Number of rows : 43
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 ZwCl 0024+1652 ClG 00 26 35.6 +17 09 32     18.35     ~ 648 1
2 ACO 68 ClG 00 37 06.2 +09 09 33           ~ 195 0
3 ACO 115 ClG 00 55 59 +26 23.2           ~ 295 1
4 ZwCl 0104+0048 ClG 01 06 50.5 +01 04 10           ~ 67 0
5 ACO 209 ClG 01 31 52.9 -13 36 53           ~ 326 0
6 ClG J0142+2131 ClG 01 42 03.1 +21 30 39           ~ 60 1
7 ACO 267 ClG 01 52 43.016 +00 59 58.90           ~ 241 0
8 ACO 291 ClG 02 01 42.9 -02 11 48           ~ 72 0
9 ACO 383 ClG 02 48 03.3915 -03 31 45.228           ~ 389 0
10 ACO 3266 ClG 04 31 26.4 -61 25 17           ~ 447 0
11 ClG 0657-56 ClG 06 58 26.9 -55 58 21           ~ 1077 1
12 ACO 586 ClG 07 32 20.3 +31 37 58           ~ 196 0
13 ACO 611 ClG 08 00 58.7 +36 02 49           ~ 275 0
14 ZwCl 0823+0425 ClG 08 25 57.8 +04 14 48           ~ 42 0
15 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 457 0
16 ACO 689 ClG 08 37 29 +14 59.5           ~ 53 0
17 ZwCl 0839+2937 ClG 08 42 55.9 +29 27 26     17.0     ~ 93 0
18 ACO 697 ClG 08 42 57.6 +36 21 45           ~ 277 0
19 ZwCl 0857+2107 ClG 09 00 36.90 +20 53 40.3           ~ 103 0
20 ACO 851 ClG 09 43 01.2 +46 59 54   18.9       ~ 334 0
21 ACO 963 ClG 10 17 03.4 +39 02 56           ~ 414 0
22 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
23 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
24 NAME Shapley Supercluster SCG 13 06.0 -33 04           ~ 677 0
25 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
26 ACO 3556 ClG 13 24 06.2 -31 39 38           ~ 159 0
27 ACO 3558 ClG 13 28 03.2 -31 31 35           ~ 476 2
28 BAX 202.4458-31.6081 ClG 13 29 47.0 -31 36 29           ~ 80 1
29 BAX 202.9000-31.8128 ClG 13 31 28.8 -31 49 40           ~ 88 1
30 ACO 1758 ClG 13 32 32.1 +50 30 37           ~ 266 2
31 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 337 1
32 ACO 1763 ClG 13 35 20.1 +41 00 04           ~ 335 0
33 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 727 1
34 ACO 1914 ClG 14 25 57.4 +37 49 54           ~ 338 0
35 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 309 0
36 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 827 1
37 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 381 0
38 ClG J1720+2638 ClG 17 20 09.6 +26 37 35           ~ 284 0
39 ACO 2345 ClG 21 27 05.391 -12 09 07.41           ~ 151 0
40 NVSS J212709-120958 Rad 21 27 09.27 -12 10 01.5           ~ 132 1
41 ClG J2129+0005 ClG 21 29 40.5 +00 05 47           ~ 308 0
42 ACO 2390 ClG 21 53 37.4 +17 41 46           ~ 732 2
43 ACO 2485 ClG 22 48 33 -16 07.1           ~ 53 0

To bookmark this query, right click on this link: simbad:objects in 2013ApJ...775..126H and select 'bookmark this link' or equivalent in the popup menu