Discovery of rapid radial velocity variations in the roAp star 10 Aql and possible pulsations of β CrB

Details Discovery of rapid radial velocity variations in the roAp star 10 Aql and possible pulsations of β CrB Discovery of rapid radial velocity variations in the roAp star 10 Aql and possible pulsations of β CrB

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002mnras.337l...1k&link_type=abstract

Monthly Notice of the Royal Astronomical Society, Volume 337, Issue 2, pp. L1-L5.

Astronomy and Astrophysics

Astronomy

33

Stars: Chemically Peculiar, Stars: Individual: 10 Aql, Stars: Individual: Β Crb, Stars: Oscillations

Scientific paper

We report discovery of radial velocity variations in rare earth spectral lines of the roAp star 10 Aql with amplitudes of between 30 and 130 m s-1 and periods of about 11 min. Radial velocity variations with amplitude 70 m s-1 may also have been detected in one spectral line of Fe I in β CrB. If confirmed, our results may indicate that all Ap stars in a certain temperature range pulsate, which means that roAp stars do not exist as a separate class but are only distinguished by higher pulsational amplitudes.

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