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

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dc.contributor.authorPérez González, Pablo Guillermo
dc.contributor.authorotros, ...
dc.date.accessioned2023-06-20T04:15:16Z
dc.date.available2023-06-20T04:15:16Z
dc.date.issued2012-03-01
dc.description© 2012 The American Astronomical Society. Artículo firmado por 15 autores. This work is partially based on observations made with the Herschel Space Observatory, a European Space Agency Cornerstone Mission with significant participation by NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech. We also thank the HSC and NHSC consortia for support with data reduction. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. G. P. S. acknowledges support from the Royal Society.
dc.description.abstractWe 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.
dc.description.departmentDepto. de Física de la Tierra y Astrofísica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipNational Aeronautics and Space Administration (NASA)
dc.description.sponsorshipJPL/Caltech (NASA)
dc.description.sponsorshipNational Science Foundation (NSF)
dc.description.sponsorshipRoyal Society
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/38502
dc.identifier.doi10.1088/0004-637X/747/1/29
dc.identifier.issn0004-637X
dc.identifier.officialurlhttp://dx.doi.org/10.1088/0004-637X/747/1/29
dc.identifier.relatedurlhttp://iopscience.iop.org/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/45095
dc.issue.number1
dc.journal.titleAstrophysical journal
dc.language.isoeng
dc.publisherAmerican Astronomical Society
dc.rights.accessRightsopen access
dc.subject.cdu52
dc.subject.keywordRay-luminous clusters
dc.subject.keywordInfrared survey
dc.subject.keywordFlow clusters
dc.subject.keywordMolecular-hydrogen
dc.subject.keywordCentaurus cluster
dc.subject.keywordEmission-lines
dc.subject.keywordBullet cluster
dc.subject.keywordXMM-Newton
dc.subject.keywordSky survey
dc.subject.keywordGas
dc.subject.ucmAstrofísica
dc.subject.ucmAstronomía (Física)
dc.titleThe relation between cool cluster cores and Herschel-detected star formation in brightest cluster galaxies
dc.typejournal article
dc.volume.number747
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