High-Frequency Stellar Oscillations.IX. The Peculiar Blue Variable BD-7°3007
Abstract
The peculiar star BD-703007 varies rapidly with amplitudes less than 0.10 mag. The power spectra show no harmonic features; however, significant low-amplitude transient activity exists in the 1( s range; and there are persistent broad-banded peaks at about 21 and 10.3 minutes. Scanner observations, showing Ha emission, broad, weak H absorption, and an approximately blackbody continuum with T 10 K, imply that the star is degenerate and deficient in hydrogen. The available data admit the presence of two degenerate stars with circumstellar material.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 1972
- DOI:
- 10.1086/181014
- Bibcode:
- 1972ApJ...176L..31H