An Upper Limit on the Amplitude of Rapid K-Band 2.2-MICRONS Oscillations in the Rapidly Oscillating Ap-Star HD217522

Details An Upper Limit on the Amplitude of Rapid K-Band 2.2-MICRONS Oscillations in the Rapidly Oscillating Ap-Star HD217522 An Upper Limit on the Amplitude of Rapid K-Band 2.2-MICRONS Oscillations in the Rapidly Oscillating Ap-Star HD217522

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.268..169m&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 268, NO. 1/MAY1, P. 169, 1994

Astronomy and Astrophysics

Astronomy

1

Stars: Chemically Peculiar - Stars: Individual: Hd 217522 - Stars: Oscillations

Scientific paper

We present simultaneous high-speed B- and K-band photometric observations of the rapidly oscillating Ap star HD 217522. Oscillations with a period of 13.8 min and an amplitude of 2.00 mmag are detectable in the B data. We place an upper limit of 0.63 mmag on the semi-amplitude of K-band oscillations with the same period. This upper limit is drawn from a conservative analysis of the entire data set. Analyses of the best subsets of the data suggest the possible presence of rapid oscillations, and we argue that further observations with a lower noise level are desirable.

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