Multiwavelength observations of the Be/X-ray binary 4U 1145 -- 619
Open Access
- 11 July 1997
- journal article
- research article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 288 (4) , 988-994
- https://doi.org/10.1093/mnras/288.4.988
Abstract
We report optical and infrared observations of the massive X-ray binary system 4U 1145-619 (V801 Cen), which show that the circumstellar disc of the Be star component is in decline. Infrared JHKL magnitudes of V801 Cen 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 uvbyβ indices, corrected for both circumstellar and interstellar effects, to calculate the physical parameters of the underlying B star.Keywords
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