2015MNRAS.452.2731S


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.02CEST11:15:11

2015MNRAS.452.2731S - Mon. Not. R. Astron. Soc., 452, 2731-2744 (2015/September-3)

Neutral hydrogen gas, past and future star formation in galaxies in and around the `Sausage' merging galaxy cluster.

STROE A., OOSTERLOO T., ROTTGERING H.J.A., SOBRAL D., VAN WEEREN R. and DAWSON W.

Abstract (from CDS):

CIZA J2242.8+5301 (z = 0.188, nicknamed `Sausage') is an extremely massive (M200 ∼ 2.0x1015M), merging cluster with shock waves towards its outskirts, which was found to host numerous emission line galaxies. We performed extremely deep Westerbork Synthesis Radio Telescope HI observations of the `Sausage' cluster to investigate the effect of the merger and the shocks on the gas reservoirs fuelling present and future star formation (SF) in cluster members. By using spectral stacking, we find that the emission line galaxies in the `Sausage' cluster have, on average, as much HI gas as field galaxies (when accounting for the fact cluster galaxies are more massive than the field galaxies), contrary to previous studies. Since the cluster galaxies are more massive than the field spirals, they may have been able to retain their gas during the cluster merger. The large HI reservoirs are expected to be consumed within ∼ 0.75-1.0 Gyr by the vigorous SF and active galactic nuclei activity and/or driven out by the outflows we observe. We find that the star formation rate (SFR) in a large fraction of Hα emission line cluster galaxies correlates well with the radio broad-band emission, tracing supernova remnant emission. This suggests that the cluster galaxies, all located in post-shock regions, may have been undergoing sustained SFR for at least 100 Myr. This fully supports the interpretation proposed by Stroe et al. and Sobral et al. that gas-rich cluster galaxies have been triggered to form stars by the passage of the shock.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): shock waves - galaxies: active - galaxies: clusters: individual: CIZA J2242.8+5301 - radio continuum: galaxies - radio lines: galaxies

Nomenclature: Table 3: [SOR2015] JHHMMSS.s+DDMMSS N=6. Table A1: [SOR2015] DDD.dddd+DD.dddd N=33.

Status at CDS:   All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 17

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Number of rows : 17

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 636 0
2 ACO 3128 ClG 03 30 34.6 -52 33 12           ~ 167 3
3 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 213 0
4 ICRF J052109.8+163822 Sy1 05 21 09.88592749 +16 38 22.0517668   19.37 18.84 18.480   ~ 741 1
5 ICRF J054236.1+495107 Sy1 05 42 36.13789843 +49 51 07.2337251   18.45 17.80 17.210   ~ 1258 1
6 ClG J0603.3+4214 ClG 06 03.3 +42 14           ~ 65 0
7 ACO 963 ClG 10 17 09.6 +39 01 00           ~ 350 0
8 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5794 0
9 ICRF J160913.3+264129 Sy2 16 09 13.32076181 +26 41 29.0362080   19       ~ 203 0
10 ACO 2192 ClG 16 27 24.4 +42 40 43           ~ 54 0
11 [SOR2015] J224130.4+530558 G 22 41 30.4 +53 05 58           ~ 1 0
12 [SOR2015] J224151.1+525255 G 22 41 51.1 +52 52 55           ~ 1 0
13 NAME Sausage Cluster ClG 22 42 53.0 +53 01 05           ~ 154 0
14 [SOR2015] J224256.5+525721 G 22 42 56.5 +52 57 21           ~ 1 0
15 [SOR2015] J224314.3+530457 G 22 43 14.3 +53 04 57           ~ 1 0
16 [SOR2015] J224323.2+530441 G 22 43 23.2 +53 04 41           ~ 1 0
17 [SOR2015] J224343.7+530943 G 22 43 43.7 +53 09 43           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.06.02-11:15:11

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