The mass ratio of nu SGR from ultraviolet radial velocities.
Abstract
The first positive determination of the secondary orbit of the hydrogen-deficient binary υ Sgr has been achieved by the application of cross-correlation methods to high-resolution ultraviolet (UV) spectra obtained with IUE. The mass ratio thus obtained (q = 0.63±0.01) and the consequent minimum mass for the primary (Mp sin3i/Msun=2.52±0.05) indicate that υ Sgr is a strong candidate as a progenitor of a type Ib supernova.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- December 1990
- Bibcode:
- 1990MNRAS.247..400D