10 New γ Doradus and δ Scuti Stars
Abstract
We present high-resolution spectroscopy and precision photometry of five new γ Doradus and five new δ Scuti variables. The five new γ Doradus variables substantially increase the number of confirmed stars of this class. All 10 stars fall in the spectral class range F0-F2, but they are cleanly separated into two groups by their luminosity and photometric periods. However, the period gap between the γ Doradus and δ Scuti stars is becoming very narrow since we confirm that HD 155154 is a γ Doradus star with the shortest periods reported to date (the shortest of its four periods is ~0.312 days). We do not find any evidence in our sample for stars exhibiting both δ Scuti- and γ Doradus-type pulsations.
- Publication:
-
The Astronomical Journal
- Pub Date:
- December 2001
- DOI:
- 10.1086/324228
- Bibcode:
- 2001AJ....122.3383H
- Keywords:
-
- Stars: Variables: δ Scuti;
- Stars: Early-Type;
- Stars: Fundamental Parameters;
- Stars: Oscillations;
- Stars: Variables: Other