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Multiwavelength observations of EXO 0748−676. II. Emission-line behavior

Pearson, K. J.; Hynes, R. I.; Steeghs, D.; Jonker, P. G.; Haswell, C. A.; King, A. R.; O'Brien, K.; Nelemans, G. and Mendez, M. (2006). Multiwavelength observations of EXO 0748−676. II. Emission-line behavior. Astrophysical Journal, 648(2) pp. 1169–1180.

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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 .

Item Type: Journal Article
Copyright Holders: 2006. The American Astronomical Society
ISSN: 1538-4357
Keywords: accretion, accretion disks — binaries: closestars: individual (UY Vol)
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 10861
Depositing User: Astrid Peterkin
Date Deposited: 25 Jun 2008
Last Modified: 14 Jan 2016 16:58
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