Poster abstract details

Gamma Dor And Gamma Dor - Delta Scuti Hybrid Stars In The CoRoT LRa01
M. Hareter, A. Miglio, J. Montalban, P.Reegen, A.Kaiser, I. Dekany, E. Poretti & The Gamma Dor Thematic Team

Abstract

A systematic search for $\gamma$ Dor and $\gamma$ Dor - $\delta$ Sct hybrid pulsators was conducted on the CoRoT LRa01 Exo-archive leading a total of 419 $\gamma$ Dor and 274 $\gamma$ Dor - $\delta$ Sct hybrid candidates. 194 and 165 respectively, of these candidates show no severe residual artifacts after our data reduction pipeline and were investigated in more detail. For about 25% of these candidates AAO classification spectra are available.

A detailed analysis of the lightcurves, including a check for combination frequencies, together with spectroscopic stellar classification allowed us to identify:
I) 34 $\gamma$ Dor stars, which show very different pulsation spectra where mostly two modes dominate. Furthermore, a search for regularity in their oscillation spectra allowed to derive a period spacing for 5 of these $gamma$ doradus;
II) 25 clear hybrid pulsators showing frequencies in the $\gamma$ Dor and $\delta$ Sct domain and A-F spectral type.