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Title: The hot γ Doradus and Maia stars
Authors: Balona, L. A
Engelbrecht, C. A
Joshi, Y. C
Joshi, S
Sharma, K
Semenko, E
Pandey, G
Chakradhari, N. K
Mkrtichian, D
Hema, B. P
Nemec, J. M
Keywords: Stars: oscillations;Stars: variables: general
Issue Date: 1-Aug-2016
Publisher: Oxford University Press on behalf of the Royal Astronomical Society
Citation: Monthly Notices of the Royal Astronomical Society, Vol. 460, No. 2, pp. 1318-1327
Abstract: The hot γ Doradus stars have multiple low frequencies characteristic of γ Dor or SPB variables, but are located between the red edge of the SPB and the blue edge of the γ Dor instability strips where all low-frequency modes are stable in current models of these stars. Though δ Sct stars also have low frequencies, there is no sign of high frequencies in hot γ Dor stars. We obtained spectra to refine the locations of some of these stars in the H-R diagram and conclude that these are, indeed, anomalous pulsating stars. The Maia variables have multiple high frequencies characteristic of β Cep and δ Sct stars, but lie between the red edge of the β Cep and the blue edge of the δ Sct instability strips. We compile a list of all Maia candidates and obtain spectra of two of these stars. Again, it seems likely that these are anomalous pulsating stars which are currently not understood.
Description: Restricted Access
ISSN: 1365-2966
???metadata.dc.rights???: © Royal Astronomical Society
Appears in Collections:IIAP Publications

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