2016A&A...589A..82C


Query : 2016A&A...589A..82C

2016A&A...589A..82C - Astronomy and Astrophysics, volume 589A, 82-82 (2016/5-1)

Disc colours in field and cluster spiral galaxies at 0.5 ≲ z ≲ 0.8.

CANTALE N., JABLONKA P., COURBIN F., RUDNICK G., ZARITSKY D., MEYLAN G., DESAI V., DE LUCIA G., ARAGON-SALAMANCA A., POGGIANTI B.M., FINN R. and SIMARD L.

Abstract (from CDS):

We present a detailed study of the colours of late-type galaxy discs for ten of the EDisCS galaxy clusters with 0.5<= z<= 0.8. Our cluster sample contains 172 spiral galaxies, and our control sample is composed of 96 field disc galaxies. We deconvolved their ground-based V and I images obtained with FORS2 at the VLT with initial spatial resolutions between 0.4 and 0.8-arcsec to achieve a final resolution of 0.1-arcsec with 0.05-arcsec pixels, which is close to the resolution of the ACS at the HST. After removing the central region of each galaxy to avoid pollution by the bulges, we measured the V-I colours of the discs. We find that 50% of cluster spiral galaxies have disc V-I colours redder by more than 1σ of the mean colours of their field counterparts. This is well above the 16% expected for a normal distribution centred on the field disc properties. The prominence of galaxies with red discs depends neither on the mass of their parent cluster nor on the distance of the galaxies to the cluster cores. Passive spiral galaxies constitute 20% of our sample. These systems are not abnormally dusty. They are are made of old stars and are located on the cluster red sequences. Another 24% of our sample is composed of galaxies that are still active and star forming, but less so than galaxies with similar morphologies in the field. These galaxies are naturally located in the blue sequence of their parent cluster colour-magnitude diagrams. The reddest of the discs in clusters must have stopped forming stars more than ∼5Gyr ago. Some of them are found among infalling galaxies, suggesting preprocessing. Our results confirm that galaxies are able to continue forming stars for some significant period of time after being accreted into clusters, and suggest that star formation can decline on seemingly long (1 to 5Gyr) timescales.

Abstract Copyright: © ESO, 2016

Journal keyword(s): methods: data analysis - galaxies: clusters: general - galaxies: evolution

Simbad objects: 37

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Number of rows : 37
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 ZwCl 0024+1652 ClG 00 26 35.6 +17 09 32     18.35     ~ 633 1
2 EDCS J1037521-1243392 GiC 10 37 52.10 -12 43 39.2         21.294 ~ 3 0
3 ClG J1037-1243 ClG 10 37 52.6 -12 43 44           ~ 40 0
4 EDCS J1037535-1244006 GiC 10 37 53.48 -12 44 00.6         21.052 ~ 4 0
5 EDCS J1040329-1158218 GiC 10 40 32.86 -11 58 21.8         21.000 ~ 2 0
6 EDCS J1040410-1156345 GiC 10 40 40.97 -11 56 34.5         21.428 ~ 6 0
7 EDCS J1040410-1155590 GiC 10 40 41.01 -11 55 59.0         21.371 ~ 5 0
8 ClG J1040-1155 ClG 10 40 41.6 -11 55 51           ~ 56 0
9 EDCS J1054242-1146564 GiC 10 54 24.16 -11 46 56.4         21.585 ~ 3 0
10 ClG J1054-1146 ClG 10 54 24.2 -11 46 18           ~ 53 0
11 EDCS J1054368-1245039 GiC 10 54 36.82 -12 45 03.9         22.551 ~ 2 0
12 EDCS J1054416-1247375 GiC 10 54 41.57 -12 47 37.5         20.784 ~ 3 0
13 ClG J1054-1245 ClG 10 54 43.5 -12 45 50           ~ 55 0
14 ClG J1103-1245 ClG 11 03 42.9 -12 45 18           ~ 16 1
15 EDCS J1138078-1133592 GiC 11 38 07.79 -11 33 59.2         20.634 ~ 2 0
16 EDCS J1138099-1132035 GiC 11 38 09.93 -11 32 03.5         21.532 ~ 3 0
17 ClG J1138-1133 ClG 11 38 10.3 -11 33 59           ~ 46 0
18 EDCS J1138104-1134064 GiC 11 38 10.36 -11 34 06.4         22.394 ~ 3 0
19 EDCS J1138111-1135030 GiC 11 38 11.13 -11 35 03.0         20.968 ~ 2 0
20 EDCS J1138141-1134152 GiC 11 38 14.10 -11 34 15.2         20.849 ~ 2 0
21 EDCS J1216387-1203120 GiC 12 16 38.74 -12 03 12.0         21.189 ~ 3 0
22 EDCS J1216447-1201282 GiC 12 16 44.70 -12 01 28.2         21.277 ~ 6 0
23 EDCS J1216449-1202036 GiC 12 16 44.91 -12 02 03.6         21.505 ~ 5 0
24 ClG J1216-1201 ClG 12 16 45.10 -12 01 17.3           ~ 68 0
25 EDCS J1216470-1159267 GiC 12 16 46.97 -11 59 26.7         21.704 ~ 7 0
26 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6592 0
27 ClG J1227-1138 ClG 12 27 53.9 -11 38 20           ~ 47 0
28 EDCS J1227541-1138174 GiC 12 27 54.14 -11 38 17.4         21.066 ~ 5 0
29 EDCS J1227572-1135552 GiC 12 27 57.15 -11 35 55.2         20.555 ~ 2 0
30 EDCS J1228001-1136095 GiC 12 28 00.09 -11 36 09.5         21.281 ~ 3 0
31 EDCS J1232238-1252111 GiC 12 32 23.75 -12 52 10.9         21.348 ~ 3 0
32 EDCS J1232275-1248540 GiC 12 32 27.45 -12 48 54.0         20.869 ~ 2 0
33 ClG J1232-1250 ClG 12 32 30.5 -12 50 33           ~ 51 0
34 EDCS J1232317-1249275 GiC 12 32 31.75 -12 49 27.5         20.174 ~ 6 0
35 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 4763 2
36 EDCS J1354025-1232300 GiC 13 54 02.53 -12 32 30.0         20.740 ~ 2 0
37 ClG J1354-1230 ClG 13 54 09.5 -12 30 59           ~ 47 0

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