Orbital periods of the binary sdB stars PG 0940+068 and PG 1247+554

Authors
Maxted, PFL Moran, CKJ Marsh, TR Gatti, AA
Citation
Pfl. Maxted et al., Orbital periods of the binary sdB stars PG 0940+068 and PG 1247+554, M NOT R AST, 311(4), 2000, pp. 877-880
Citations number
17
Categorie Soggetti
Space Sciences
Journal title
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN journal
00358711 → ACNP
Volume
311
Issue
4
Year of publication
2000
Pages
877 - 880
Database
ISI
SICI code
0035-8711(20000201)311:4<877:OPOTBS>2.0.ZU;2-T
Abstract
We have used the radial velocity variations of two sdB stars previously rep orted to be binaries to establish their orbital periods. They are PG0940+06 8 (P = 8.33 d) and PG 1247+554 (P = 0.599 d). The minimum masses of the uns een companions, assuming a mass of 0.5 Mo for the sdB stars, are 0.090 +/- 0.003 M. for PG1247+554 and 0.63 +/- 0.02 M. for PG 0940+068. The nature of the companions is not constrained further by our data.