SIMBAD references

2012ApJ...747...29R - Astrophys. J., 747, 29 (2012/March-1)

The relation between cool cluster cores and herschel-detected star formation in brightest cluster galaxies.

RAWLE T.D., EDGE A.C., EGAMI E., REX M., SMITH G.P., ALTIERI B., FIEDLER A., HAINES C.P., PEREIRA M.J., PEREZ-GONZALEZ P.G., PORTOUW J., VALTCHANOV I., WALTH G., VAN DER WERF P.P. and ZEMCOV M.

Abstract (from CDS):

We present far-infrared (FIR) analysis of 68 brightest cluster galaxies (BCGs) at 0.08 < z < 1.0. Deriving total infrared luminosities directly from Spitzer and Herschel photometry spanning the peak of the dust component (24-500 µm), we calculate the obscured star formation rate (SFR). 22+6.2–5.3% of the BCGs are detected in the far-infrared, with SFR = 1-150 Myr–1. The infrared luminosity is highly correlated with cluster X-ray gas cooling times for cool-core clusters (gas cooling time <1 Gyr), strongly suggesting that the star formation in these BCGs is influenced by the cluster-scale cooling process. The occurrence of the molecular gas tracing Hα emission is also correlated with obscured star formation. For all but the most luminous BCGs (LTIR> 2x1011 L), only a small ( ≲ 0.4 mag) reddening correction is required for SFR(Hα) to agree with SFRFIR. The relatively low Hα extinction (dust obscuration), compared to values reported for the general star-forming population, lends further weight to an alternate (external) origin for the cold gas. Finally, we use a stacking analysis of non-cool-core clusters to show that the majority of the fuel for star formation in the FIR-bright BCGs is unlikely to originate from normal stellar mass loss.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - galaxies: elliptical and lenticular, cD - galaxies: star formation - infrared: galaxies

Nomenclature: Table 1: [REE2012] JHHMMSS.s+DDMMSS N=65.

Simbad objects: 137

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