AustralieFrV1, Main, Exploration, bibRecord, 007821

Herschel observations of FIR emission lines in brightest cluster galaxies

Identifieur interne : 007821 ( Main/Exploration ); précédent : 007820; suivant : 007822

Herschel observations of FIR emission lines in brightest cluster galaxies

Auteurs : A. C. Edge [Royaume-Uni] ; J. B. R. Oonk [Pays-Bas] ; R. Mittal [États-Unis] ; S. W. Allen [États-Unis] ; S. A. Baum [États-Unis] ; H. Böhringer [Allemagne] ; J. N. Bregman [États-Unis] ; M. N. Brewer [Royaume-Uni] ; F. Combes [France] ; C. S. Crawford [Royaume-Uni] ; M. Donahue [États-Unis] ; E. Egami [États-Unis] ; A. C. Fabian [Royaume-Uni] ; G. J. Ferland [États-Unis] ; S. L. Hamer [Royaume-Uni] ; N. A. Hatch [Royaume-Uni] ; W. Jaffe [Pays-Bas] ; R. M. Johnstone [Royaume-Uni] ; B. R. Mcnamara [Canada] ; C. P. O'Dea [États-Unis] ; P. Popesso [Allemagne] ; A. C. Quillen [États-Unis] ; P. Salome [France] ; C. L. Sarazinl [États-Unis] ; G. M. Voit [États-Unis] ; R. J. Wilman [Australie] ; M. W. Wise [Pays-Bas]

Source :

Astronomy and astrophysics : (Berlin. Print) [ 0004-6361 ] ; 2010.

RBID : Pascal:11-0086167

Descripteurs français

Pascal (Inist)
- Raie émission, Amas galaxies, Ecoulement refroidissement, Gaz froid, Gaz moléculaire, Rayonnement UV, Etoile jeune, Largeur raie, Dynamique, Luminosité, Galaxies elliptiques, Nuage moléculaire, Nuage dense, Gaz dense, Matière intraamas.

English descriptors

KwdEn :
- Cold gas, Cooling flow, Dense cloud, Dense gas, Dynamics, Elliptical galaxies, Emission line, Galaxy clusters, Intracluster matter, Line widths, Luminosity, Molecular clouds, Molecular gas, Ultraviolet radiation, Young stars.

Abstract

The question of how much gas cools in the cores of clusters of galaxies has been the focus of many, multiwavelength studies in the past 30 years. In this letter we present the first detections of the strongest atomic cooling lines, [CII], [OI] and [NII] in two strong cooling flow clusters, A1068 and A2597, using HersrcheL-PACS. These spectra indicate that the substantial mass of cold molecular gas (> 10⁹ M_◦.) known to be present in these systems is being irradiated by intense UV radiation, most probably from young stars. The line widths of these FIR lines indicate that they share dynamics similar but not identical to other ionised and molecular gas traced by optical, near-infrared and CO lines. The relative brightness of the FIR lines compared to CO and FIR luminosity is consistent with other star-forming galaxies indicating that the properties of the molecular gas clouds in cluster cores and the stars they form are not unusual. These results provide additional evidence for a reservoir of cold gas that is fed by the cooling of gas in the cores of the most compact clusters and provide important diagnostics of the temperature and density of the dense clouds this gas resides in.

Affiliations:

Links toward previous steps (curation, corpus...)

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Le document en format XML

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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Herschel observations of FIR emission lines in brightest cluster galaxies</title>
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<author><name sortKey="Wise, M W" sort="Wise, M W" uniqKey="Wise M" first="M. W." last="Wise">M. W. Wise</name>
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<series><title level="j" type="main">Astronomy and astrophysics : (Berlin. Print)</title>
<title level="j" type="abbreviated">Astron. astrophys. : (Berl., Print)</title>
<idno type="ISSN">0004-6361</idno>
<imprint><date when="2010">2010</date>
</imprint>
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<seriesStmt><title level="j" type="main">Astronomy and astrophysics : (Berlin. Print)</title>
<title level="j" type="abbreviated">Astron. astrophys. : (Berl., Print)</title>
<idno type="ISSN">0004-6361</idno>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cold gas</term>
<term>Cooling flow</term>
<term>Dense cloud</term>
<term>Dense gas</term>
<term>Dynamics</term>
<term>Elliptical galaxies</term>
<term>Emission line</term>
<term>Galaxy clusters</term>
<term>Intracluster matter</term>
<term>Line widths</term>
<term>Luminosity</term>
<term>Molecular clouds</term>
<term>Molecular gas</term>
<term>Ultraviolet radiation</term>
<term>Young stars</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Raie émission</term>
<term>Amas galaxies</term>
<term>Ecoulement refroidissement</term>
<term>Gaz froid</term>
<term>Gaz moléculaire</term>
<term>Rayonnement UV</term>
<term>Etoile jeune</term>
<term>Largeur raie</term>
<term>Dynamique</term>
<term>Luminosité</term>
<term>Galaxies elliptiques</term>
<term>Nuage moléculaire</term>
<term>Nuage dense</term>
<term>Gaz dense</term>
<term>Matière intraamas</term>
</keywords>
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<front><div type="abstract" xml:lang="en">The question of how much gas cools in the cores of clusters of galaxies has been the focus of many, multiwavelength studies in the past 30 years. In this letter we present the first detections of the strongest atomic cooling lines, [CII], [OI] and [NII] in two strong cooling flow clusters, A1068 and A2597, using HersrcheL-PACS. These spectra indicate that the substantial mass of cold molecular gas (> 10<sup>9</sup>
 M<sub>◦.</sub>
) known to be present in these systems is being irradiated by intense UV radiation, most probably from young stars. The line widths of these FIR lines indicate that they share dynamics similar but not identical to other ionised and molecular gas traced by optical, near-infrared and CO lines. The relative brightness of the FIR lines compared to CO and FIR luminosity is consistent with other star-forming galaxies indicating that the properties of the molecular gas clouds in cluster cores and the stars they form are not unusual. These results provide additional evidence for a reservoir of cold gas that is fed by the cooling of gas in the cores of the most compact clusters and provide important diagnostics of the temperature and density of the dense clouds this gas resides in.</div>
</front>
</TEI>
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Herschel observations of FIR emission lines in brightest cluster galaxies

Herschel observations of FIR emission lines in brightest cluster galaxies

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