CA II H&K survey of Gamma Doradus candidates

Details CA II H&K survey of Gamma Doradus candidates CA II H&K survey of Gamma Doradus candidates

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.294l..35k&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 294, p. L35-L39

Astronomy and Astrophysics

Astronomy

14

Stellar Oscillations, Variable Stars, Stellar Activity, Chromosphere, Dwarf Stars, Line Spectra

Scientific paper

In an investigation of the starspot hypothesis as it applies to the 'slowly variable' F-type dwarfs, we spectroscopically observed eight promising Gamma Doradus candidates to search for Ca II H&K emission. We found that there are no significant emission reversals in the cores of these resonance lines. Based on the ceiling flux calculations of the Ca II K line and on calculations of the Rossby number, we conclude that there is no support for the presence of strong magnetic activity and the starspot hypothesis in these objects.

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