Multiwavelength observations of the Be/X-ray binary 4U1145-619
Abstract
We report optical and infrared observations of the massive X-ray binary system 4U1145-619 (V801Cen), which show that the circumstellar disc of the Be star component is in decline. Infrared JHKL magnitudes of V801Cen have been monitored from 1993 March to 1996 April. Hα spectra have been obtained throughout the same period. We find that both the infrared excess and the Balmer emission have been in decline throughout the period of observations. A 13-yr optical and X-ray history of the source is collated, revealing a possible correlation between the optical and X-ray activity. In addition, we use uvbybeta indices, corrected for both circumstellar and interstellar effects, to calculate the physical parameters of the underlying B star.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- July 1997
- DOI:
- 10.1093/mnras/288.4.988
- arXiv:
- arXiv:astro-ph/9706110
- Bibcode:
- 1997MNRAS.288..988S
- Keywords:
-
- BINARIES: GENERAL;
- STARS: EMISSION-LINE;
- BE;
- STARS: INDIVIDUAL: V801CEN;
- STARS: NEUTRON;
- INFRARED: STARS;
- X-RAYS: STARS.;
- Astrophysics
- E-Print:
- 8 pages postscript. Accepted by MNRAS