Matches in SemOpenAlex for { <https://semopenalex.org/work/W2904646246> ?p ?o ?g. }
- W2904646246 endingPage "5573" @default.
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- W2904646246 abstract "We have created a new, clean catalogue of extragalactic non-nuclear X-ray sources by correlating the 3XMM-DR4 data release of the XMM–Newton Serendipitous Source Catalogue with the Third Reference Catalogue of Bright Galaxies and the Catalogue of Neighbouring Galaxies, using an improved version of the method presented in Walton et al. Our catalogue contains 1314 sources, of which 384 are candidate ultraluminous X-ray sources (ULXs). The resulting catalogue improves upon previous catalogues in its handling of spurious detections by taking into account XMM–Newton quality flags. We estimate the contamination of ULXs by background sources to be 24 per cent. We define a ‘complete’ subsample as those ULXs in galaxies for which the sensitivity limit is below 1039 erg s−1 and use it to examine the hardness ratio properties between ULX and non-ULX sources, and ULXs in different classes of host galaxy. We find that ULXs have a similar hardness ratio distribution to lower luminosity sources, consistent with previous studies. We also find that ULXs in spiral and elliptical host galaxies have similar distributions to each other independent of host galaxy morphology, however, our results do support previous indications that the population of ULXs is more luminous in star-forming host galaxies than in non-star-forming galaxies. Our catalogue contains further interesting subpopulations for future study, including Eddington Threshold sources and highly variable ULXs. We also examine the highest luminosity (LX > 5 × 1040 erg s−1) ULXs in our catalogue in search of intermediate-mass black hole candidates, and find nine new possible candidates." @default.
- W2904646246 created "2018-12-22" @default.
- W2904646246 creator A5019923842 @default.
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- W2904646246 creator A5039890776 @default.
- W2904646246 creator A5058369286 @default.
- W2904646246 creator A5069705524 @default.
- W2904646246 date "2018-12-22" @default.
- W2904646246 modified "2023-10-13" @default.
- W2904646246 title "A new, clean catalogue of extragalactic non-nuclear X-ray sources in nearby galaxies" @default.
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