The X-Ray Luminosity Function of Nearby Rich and Poor Clusters of Galaxies:A Cosmological Probe

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The X-Ray Luminosity Function of Nearby Rich and Poor Clusters of Galaxies:A Cosmological Probe

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/5217

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dc.contributor.author Ledlow, Michael J. en
dc.contributor.author Loken, Christen en
dc.contributor.author Burns, Jack O. en
dc.contributor.author Owen, Frazer N. en
dc.contributor.author Voges, Wolfgang en
dc.date.accessioned 2010-02-04T16:17:48Z en
dc.date.available 2010-02-04T16:17:48Z en
dc.date.issued 1999-05-10 en
dc.identifier.citation The Astrophysical Journal, 516:L53-L56, 1999 May 10 en
dc.identifier.issn 1538-4357 en
dc.identifier.uri http://hdl.handle.net/10355/5217 en
dc.description.abstract In this Letter, we present a new determination of the local (z · 0.09) X-ray luminosity function (XLF) using a large, statistical sample of 294 Abell clusters and the ROSAT All-Sky Survey. Despite the optical selection of this catalog, we find excellent agreement with other recent determinations of the local XLF. Given our large sample size, we have reduced errors by nearly a factor of 2 for L ¸ 1043 h22 ergs s21. We combine our X(0.5-2.0 keV) 50 data with previous work to produce the most tightly constrained local determination of the XLF (over 3 orders of magnitude in LX) in order to explore possible constraints imposed by the shape of the XLF on cosmological models. A set of currently viable cosmologies is used to construct theoretical XLFs assuming L / Mp and a j8-Q0 constraint based on the local X-ray temperature function. We fit these models to our observed XLF and verify that the simplest adiabatic, analytic scaling relation disagrees strongly with observations. If we assume that clusters can be described by the preheated, constant core entropy models of Evrard & Henry, then the observed XLF is consistent only with 0.1 ! Q ! 0.4 if the energy per unit mass in galaxies is roughly equal to 0 the gas energy (i.e., if b » 1). en
dc.description.sponsorship This work was supported in part by NASA grants NAG5-6739 and NAGW-3152 and NSF grant AST-9896039. en
dc.language.iso en_US en
dc.publisher American Astronomical Society en
dc.relation.ispartof Physics and Astronomy publications (MU) en
dc.source.uri http://www.iop.org/EJ/article/1538-4357/516/2/L53/985566.web.pdf?request-id=e6beee5f-e720-46dd-b867-7e28e2ff9bc5 en
dc.subject cosmology en
dc.subject galaxy clusters en
dc.subject X-rays en
dc.subject.lcsh X-ray astronomy en
dc.subject.lcsh Galaxies -- Observations en
dc.subject.lcsh Galaxies -- Clusters en
dc.subject.lcsh Stars -- Luminosity function en
dc.title The X-Ray Luminosity Function of Nearby Rich and Poor Clusters of Galaxies:A Cosmological Probe en
dc.type Article en
dc.relation.ispartofcommunity University of Missouri-Columbia. College of Arts and Sciences. Department of Physics and Astronomy


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