SIMBAD references

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.


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

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2015MNRAS.452.2731S and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact