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Kinematical studies of the low-mass X-ray binary GR Mus (XB 1254–690) |
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| Authors: | A D Barnes J Casares R Cornelisse P A Charles D Steeghs R I Hynes K O'Brien |
| Institution: | School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ;Instituto de Astrofisica de Canarias, 38200 La Laguna, Tenerife, Spain;South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape, South Africa;Harvard-Smithsonian Centre for Astrophysics, MS-67, 60 Garden Street, Cambridge, MA 02138, USA;Department of Physics, University of Warwick, Coventry CV4 7AL;Department of Physics and Astronomy, 202 Nicholson Hall, Louisiana State University, Baton Rouge, LA 70803, USA;European Southern Observatory, Casilla 19001, Santiago 19, Chile |
| Abstract: | We present simultaneous high-resolution optical spectroscopy and X-ray data of the X-ray binary system GR Mus (XB 1254–690), obtained over a full range of orbital phases. The X-ray observations are used to re-establish the orbital ephemeris for this source. The optical data include the first spectroscopic detection of the donor star in this system through the use of the Doppler Tomography technique on the Bowen fluorescence blend (～4630–4650 Å). In combination with an estimate for the orbital parameters of the compact object using the wings of the He ii λ4686 emission line, dynamical mass constraints of 1.20 ≤ M |
| Keywords: | binaries: close binaries: spectroscopic stars: individual: GR Mus stars: individual: XB 1254–690 X-rays: binaries |