Supersoft X-ray Sources in the GALEX Images of M31

Details Supersoft X-ray Sources in the GALEX Images of M31 Supersoft X-ray Sources in the GALEX Images of M31

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1010..351o&link_type=abstract

A POPULATION EXPLOSION: The Nature & Evolution of X-ray Binaries in Diverse Environments. AIP Conference Proceedings, Volume 10

Physics

X-Ray Sources, X-Ray Bursts, Quasars, X-Ray Binaries, Faint Blue Stars, White Dwarfs, Degenerate Stars, Nuclei Of Planetary Nebulae

Scientific paper

We present the results of a search for UV counterparts of the supersoft X-ray source population (SSS) in M31 using GALEX. We find 13 UV sources coincident with the positions of known SSS discovered with ROSAT, Chandra and XMM-Newton, and 3 counterparts to ``quasi-soft'' sources. We measured the flux in the NUV and FUV GALEX bands. Correcting for extinction, several objects have UV luminosity >1036 erg s-1. This is consistent with the emission expected from an accreting white dwarf undergoing shell burning, suggesting that at least some of the SSS in M31 are potential SN Ia progenitors. We also search for counterparts to recent novae in M31, and discuss how UV data can be used to constrain the nuclear burning timescale after the outburst.

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