Pearson, K. J., Hynes, R. I., Steeghs, D. (Danny), 1972-, Jonker, P. G., Haswell, C. A., King, A. R., O'Brien, K., Nelemans, G. and Mendez, M. M.. (2006) Multiwavelength observations of EXO 0748−676. II, Emission-line behavior. The Astrophysical Journal, Vol.648 (No.2). pp. 1169-1180. ISSN 0004-637X

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Abstract

We present optical and ultraviolet spectra, light curves, and Doppler tomograms of the low-mass X-ray binary EXO 0748-676. Using an extensive set of 15 emission-line tomograms, we show that, along with the usual emission from the stream and "hot spot," there is extended nonaxisymmetric emission from the disk rim. Some of the emission and Hα and Hβ absorption features lend weight to the hypothesis that part of the stream overflows the disk rim and forms a two phase medium. The data are consistent with a 1.35 M☉ neutron star with a main-sequence companion and hence a mass ratio q ≈ 0.34.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	X-ray binaries
Journal or Publication Title:	The Astrophysical Journal
Publisher:	Institute of Physics Publishing Ltd.
ISSN:	0004-637X
Date:	2006
Volume:	Vol.648
Number:	No.2
Page Range:	pp. 1169-1180
Identification Number:	10.1086/506191
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	United States. National Aeronautics and Space Administration (NASA), Smithsonian Astrophysical Observatory
Grant number:	HF-01150.01-A (NASA), NAG-7584 (NASA)
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URI:	http://wrap.warwick.ac.uk/id/eprint/48722

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