The Companion of the RR Lyrae Star TV Boo
Abstract
In her study of the RR Lyrae star TV Boo, Claudia Oliveira at the University of British Columbia, measured over a period of 3 days a mean radial velocity of Vr = -110 km/sec, while measurements made a few years earlier had shown V, - -30 km/sec. These measurements indicate orbital motions of a binary. Combining all available measurements an orbital period around 60 days is suggested. The color-color plot of V-I versus B-V is abnormal and indicates a blue companion. This must then be either a white dwarf or a horizontal branch star on the very blue end with decreasing Mv. This then is an extremely interesting binary which for the first time can give direct information about the masses of such stars. We want to observe the blue companion of this RR Lyrae star in order to determine its properties and possibly measure its orbital velocity.
- Publication:
-
IUE Proposal
- Pub Date:
- 1989
- Bibcode:
- 1989iue..prop.3380B