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The mass of the black hole in LMC X-3
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Orosz, Jerome A., Steiner, James F., McClintock, Jeffrey E., Buxton, Michelle M., Bailyn, Charles D., Steeghs, D., Guberman, Alec and Torres, Manuel A. P. (2014) The mass of the black hole in LMC X-3. Astrophysical Journal, Volume 794 (Number 2). Article number 154. doi:10.1088/0004-637X/794/2/154 ISSN 0004-637X.
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Official URL: http://dx.doi.org/10.1088/0004-637X/794/2/154
Abstract
We analyze a large set of new and archival photometric and spectroscopic observations of LMC X-3 to arrive at a self-consistent dynamical model for the system. Using echelle spectra obtained with the Magellan Inamori Kyocera Echelle instrument on the 6.5 m Magellan Clay telescope and the UVES instrument on the second 8.2 m Very Large Telescope, we find a velocity semiamplitude for the secondary star of K 2 = 241.1 ± 6.2 km s–1, where the uncertainty includes an estimate of the systematic error caused by X-ray heating. Using the spectra, we also find a projected rotational velocity of V rotsin i = 118.5 ± 6.6 km s–1. From an analysis of archival B and V light curves as well as new B and V light curves from the SMARTS 1.3 m telescope, we find an inclination of i = 69fdg84 ± 0fdg37 for models that do not include X-ray heating and an inclination of i = 69fdg24 ± 0fdg72 for models that incorporate X-ray heating. Adopting the latter inclination measurement, we find masses of 3.63 ± 0.57 M ☉ and 6.98 ± 0.56 M ☉ for the companion star and the black hole, respectively. We briefly compare our results with earlier work and discuss some of their implications.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
Journal or Publication Title: | Astrophysical Journal | ||||||||
Publisher: | IOP Publishing | ||||||||
ISSN: | 0004-637X | ||||||||
Official Date: | 2 October 2014 | ||||||||
Dates: |
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Volume: | Volume 794 | ||||||||
Number: | Number 2 | ||||||||
Article Number: | Article number 154 | ||||||||
DOI: | 10.1088/0004-637X/794/2/154 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access |
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