Skip to content Skip to navigation
University of Warwick
  • Study
  • |
  • Research
  • |
  • Business
  • |
  • Alumni
  • |
  • News
  • |
  • About

University of Warwick
Publications service & WRAP

Highlight your research

  • WRAP
    • Home
    • Search WRAP
    • Browse by Warwick Author
    • Browse WRAP by Year
    • Browse WRAP by Subject
    • Browse WRAP by Department
    • Browse WRAP by Funder
    • Browse Theses by Department
  • Publications Service
    • Home
    • Search Publications Service
    • Browse by Warwick Author
    • Browse Publications service by Year
    • Browse Publications service by Subject
    • Browse Publications service by Department
    • Browse Publications service by Funder
  • Help & Advice
University of Warwick

The Library

  • Login
  • Admin

Optical spectroscopy of the quiescent counterpart to EXO 0748-676

Tools
- Tools
+ Tools

Bassa, C. G., Jonker, P. G., Steeghs, D. and Torres, M. A. P. (2009) Optical spectroscopy of the quiescent counterpart to EXO 0748-676. Monthly Notices of the Royal Astronomical Society, Vol.399 (No.4). pp. 2055-2062. doi:10.1111/j.1365-2966.2009.15395.x

Research output not available from this repository, contact author.
Official URL: http://dx.doi.org/10.1111/j.1365-2966.2009.15395.x

Request Changes to record.

Abstract

We present phase resolved optical spectroscopy and X-ray timing of the neutron star X-ray binary EXO 0748-676 after the source returned to quiescence in the autumn of 2008. The X-ray light curve displays eclipses consistent in orbital period, orbital phase and duration with the predictions and measurements before the return to quiescence. Ha and He I emission lines are present in the optical spectra and show the signature of the orbit of the binary companion, placing a lower limit on the radial velocity semi-amplitude of K-2 > 405 km s(-1). Both the flux in the continuum and the emission lines show orbital modulations, indicating that we observe the hemisphere of the binary companion that is being irradiated by the neutron star. Effects due to this irradiation preclude a direct measurement of the radial velocity semi-amplitude of the binary companion; in fact, no stellar absorption lines are seen in the spectrum. Nevertheless, our observations place a stringent lower limit on the neutron star mass of M-1 > 1.27 M-circle dot. For the canonical neutron star mass of M-1 = 1.4 M-circle dot, the mass ratio is constrained to 0.075 < q < 0.105.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Science > Physics
Journal or Publication Title: Monthly Notices of the Royal Astronomical Society
Publisher: Wiley
ISSN: 0035-8711
Official Date: 11 November 2009
Dates:
DateEvent
11 November 2009Published
Volume: Vol.399
Number: No.4
Number of Pages: 8
Page Range: pp. 2055-2062
DOI: 10.1111/j.1365-2966.2009.15395.x
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Netherlands Organisation for Scientific Research (NWO), NASA, STFC Advanced Fellowship
Grant number: G08-9041X, G09-8055X

Data sourced from Thomson Reuters' Web of Knowledge

Request changes or add full text files to a record

Repository staff actions (login required)

View Item View Item
twitter

Email us: wrap@warwick.ac.uk
Contact Details
About Us