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The Astrophysical Journal
Article . 2006 . Peer-reviewed
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The Astrophysical Journal
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arXiv.org e-Print Archive
Preprint . 2006
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https://dx.doi.org/10.48550/ar...
Article . 2006
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The Lack of Halo Ultraluminous X-Ray Sources

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 16 Oct 2006Embargo end date: 01 Jan 2006 English Publisher:American Astronomical SocietyJournal:The Astrophysical Journal, volume 651, pages L21-L23 (issn: 0004-637X, eissn: 1538-4357, Copyright policy )
Authors: Swartz, Douglas A.;

doi: 10.1086/509076 , 10.48550/arxiv.astro-ph/0609284

arXiv: astro-ph/0609284

The Lack of Halo Ultraluminous X-Ray Sources

Abstract

The premise that Ultraluminous X-ray sources (ULXs) exist beyond the optical extent of nearby galaxies is investigated. A published catalog containing 41 ULX candidates located between 1 and ~3 times the standard D_{25} isophotal radius of their putative host galaxies is examined. Twenty-one of these sources have spectroscopically-confirmed distances. All 21 are background objects giving a 95% probability that at least 37 of the 41 candidates are background sources. Thirty-nine of the 41 sources have X-ray-to-optical flux ratios, -1.6

4 pages accepted to ApJL

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Keywords

Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics

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    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    		 6
    popularity
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    		 Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    impulse
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
6
Average
Average
Average
Green
gold
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