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Multiwavelength observations of EXO 0748−676. II, Emission-line behavior
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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. M. (2006) Multiwavelength observations of EXO 0748−676. II, Emission-line behavior. The Astrophysical Journal, Vol.648 (No.2). pp. 1169-1180. doi:10.1086/506191 ISSN 0004-637X.
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WRAP_steeghs_EMISSION LINE BEHAVIOR_0605634v1.pdf - Accepted Version Download (892Kb) | Preview |
Official URL: http://dx.doi.org/10.1086/506191
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 | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Divisions: | Faculty of Science, Engineering and Medicine > 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 | ||||
Official Date: | 2006 | ||||
Dates: |
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Volume: | Vol.648 | ||||
Number: | No.2 | ||||
Page Range: | pp. 1169-1180 | ||||
DOI: | 10.1086/506191 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 22 December 2015 | ||||
Date of first compliant Open Access: | 22 December 2015 | ||||
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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