Gamma Dor and Gamma Dor - Delta Sct Hybrid Stars In The CoRoT LRa01

Details Gamma Dor and Gamma Dor - Delta Sct Hybrid Stars In The CoRoT LRa01 Gamma Dor and Gamma Dor - Delta Sct Hybrid Stars In The CoRoT LRa01

2010-07-19

arxiv.org/abs/1007.3176v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Proceedings of the 4th HELAS International Conference held in Lanzarote, 2010

Scientific paper

A systematic search for gamma Dor and gamma Dor - delta Scuti hybrid pulsators was conducted on the CoRoT LRa01 Exo-archive yielding a total of 418 gamma Dor and 274 hybrid candidates. After an automatic jump correction 194 and 167 respectively, show no more obvious jumps and were investigated in more detail. For about 25\% of these candidates classification spectra from the Anglo-Australian Observatory (AAO) are available. The detailed frequency analysis and a check for combination frequencies together with spectroscopic information allowed us to identify I) 34 gamma Dor stars which show very different pulsation spectra where mostly two modes dominate. Furthermore, a search for regularities in their oscillation spectra allowed to derive recurrent period spacings for 5 of these gamma Dor stars. II) 25 clear hybrid pulsators showing frequencies in the gamma Dor and delta Sct domain and are of A-F spectral type.

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