Three New Black Hole Transients in M31 and the Implications for the Orbital Period Distribution

Bibcode
2009AAS...21343206G
Galache, Jose; Garcia, M. R.; Steeghs, D.; Torres, M. A. P.; Williams, B. F.; Murray, S. S.
Bibliographical reference

American Astronomical Society, AAS Meeting #213, #432.06; Bulletin of the American Astronomical Society, Vol. 41, p.299

Advertised on:
1
2009
Number of authors
6
IAC number of authors
0
Citations
0
Refereed citations
0
Description
Our neighbouring galaxy M31 (Andromeda), located 780 kpc away, offers a unique opportunity to study the X-ray population of a galaxy similar to the Milky Way. We have concentrated our monitoring campaign on following the X-ray activity of the stellar-mass black hole candidates, XRNe (X-Ray Novae), in the central region of M31. Observations are made approximately once a month with Chandra, following up any bright outbursts with HST in order to identify the optical counterparts. Having measurements of the X-ray and optical luminosities in outburst allows for the estimation of a system's orbital period. There are now 9 systems with a known or constrained orbital period in M31 and it is finally possible to compare their distribution with that of the Milky Way black hole systems. We show how the latest 3 orbital period estimates were obtained and compare both populations.
Type
Non-refereed

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