HD 62454 and HD 68192: Two New γ Doradus Variables

Details HD 62454 and HD 68192: Two New γ Doradus Variables HD 62454 and HD 68192: Two New γ Doradus Variables

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aj....118.2997k&link_type=abstract

The Astronomical Journal, Volume 118, Issue 6, pp. 2997-3005.

Other

17

Stars: Oscillations, Stars: Variables: Other

Scientific paper

We present multilongitude, multicolor photometry and simultaneous high-resolution, high signal-to-noise spectroscopy of the newly discovered γ Doradus variables HD 62454 and HD 68192. From combined Johnson and Strömgren data, we are able to identify five independent periods in HD 62454 and two stable periods in HD 68192. The data presented are sufficient to rule out all 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 γ Doradus stars. We also find that HD 62454 is a double-lined spectroscopic binary and we present an orbital solution.

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