2026-06-28T04:45:22Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/450952023-08-27T12:55:23Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Pérez González, Pablo Guillermo
author
otros, ...
2023-06-20T04:15:16Z
2023-06-20T04:15:16Z
2012-03-01
0004-637X
10.1088/0004-637X/747/1/29
https://hdl.handle.net/20.500.14352/45095
http://dx.doi.org/10.1088/0004-637X/747/1/29
http://iopscience.iop.org/
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 M ☉ yr^–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 (L_TIR > 2 × 10^11 L_☉), only a small (≤0.4 mag) reddening correction is required for SFR(Hα) to agree with SFR_FIR. 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.
eng
The relation between cool cluster cores and Herschel-detected star formation in brightest cluster galaxies
journal article
URL
https://docta.ucm.es/bitstreams/130f46d9-7706-4b54-a33a-2d806a17a69c/download
File
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7ca64631025247831cca64de9d357fa5
1636760
application/pdf
perezgonzalez34libre.pdf