HD 62454 and HD 68192: Two new gamma Doradus variables

Citation
Ab. Kaye et al., HD 62454 and HD 68192: Two new gamma Doradus variables, ASTRONOM J, 118(6), 1999, pp. 2997-3005
Citations number
29
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMICAL JOURNAL
ISSN journal
00046256 → ACNP
Volume
118
Issue
6
Year of publication
1999
Pages
2997 - 3005
Database
ISI
SICI code
0004-6256(199912)118:6<2997:H6AH6T>2.0.ZU;2-N
Abstract
We present multilongitude, multicolor photometry and simultaneous high-reso lution, high signal-to-noise spectroscopy of the newly discovered gamma Dor adus variables HD 62454 and HD 68192. From combined Johnson and Stromgren d ata, we are able to identify five independent periods in HD 62454 and two s table periods in HD 68192. The data presented are sufficient to rule out al l physically meaningful types of variations, with the one exception of the high-order, low-degree, nonradial gravity-mode pulsations that are believed to be at work in gamma Doradus stars. We also find that HD 62454 is a doub le-lined spectroscopic binary and we present an orbital solution.