Faint super-soft X-ray sources in XMM-Newton Large Magellanic Cloud fields

Article


Kahabka, P., Haberl, F., Pakull, M., Millar, W. C., White G. L., Filipovic, M. D. and Payne, J. L.. 2008. "Faint super-soft X-ray sources in XMM-Newton Large Magellanic Cloud fields ." Astronomy and Astrophysics: a European journal. 482 (1), pp. 237-245. https://doi.org/10.1051/0004-6361:20078535
Article Title

Faint super-soft X-ray sources in XMM-Newton Large Magellanic Cloud fields

ERA Journal ID1050
Article CategoryArticle
AuthorsKahabka, P., Haberl, F., Pakull, M., Millar, W. C., White G. L., Filipovic, M. D. and Payne, J. L.
Journal TitleAstronomy and Astrophysics: a European journal
Journal Citation482 (1), pp. 237-245
Number of Pages9
Year2008
PublisherEDP Sciences
Place of PublicationFrance
ISSN0004-6361
1432-0746
Digital Object Identifier (DOI)https://doi.org/10.1051/0004-6361:20078535
Web Address (URL)https://www.aanda.org/articles/aa/abs/2008/16/aa8535-07/aa8535-07.html
Abstract

Aims. We report the discovery of three faint, super-soft X-ray sources in LMC fields observed with XMM-Newton.Methods. We analyse the three new sources together with RX J0537.7-7034 and RX J0507.1-6743, both known since ROSAT.Results. We identify XMMU J050803.1-684017 with the LMC planetary nebula LHA 120-N 102 = LMC SMP 29. The EPIC-pn spectrum of XMMU J050803.1-684017can be fitted with a blackbody spectrum with an effective temperature of ~(26-51) eV and a bolometric luminosity of (0.1-30)10 erg s, depending on the assumed absorption. The source is consistent with the nucleus of a planetary nebula. The EPIC-pn spectrum of XMMU J052530.5-671501 is characterized by a blackbody temperature of ~(38-120) eV, a best-fit bolometric luminosity of ~310 erg s and absorbing LMC column of 10 cm. This most likely highly-absorbed super-soft source resembles the LMC super-soft source CAL 87. The EPIC-pn spectrum of XMMU J052215.0-701658 yields a blackbody temperature of ~(24-83) eV, but there are only about 40 source counts and the spectral parameters of the source are not well constrained. We observe RX J0537.7-7034 with EPIC-pn to be about a factor of 15 fainter compared to the ROSAT observation 11 years earlier. RX J0507.1-6743 is observed as an absorbed super-soft source by XMM-Newton and the improved X-ray position coincides with a MACHO star which is consistent with a symbiotic star. © 2008 ESO.

KeywordsBinaries: general; Galaxies: Magellanic Clouds; Stars; Stars: binaries: close; Stars: general; X-rays: stars
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Byline AffiliationsMax Planck Society, Germany
Observatory of Strasbourg, France
James Cook University
University of Western Sydney
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