A Period Investigation of the δ Scuti Star AN Lyncis

Details A Period Investigation of the δ Scuti Star AN Lyncis A Period Investigation of the δ Scuti Star AN Lyncis

Aug 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010pasj...62..987l&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.62, No.4, pp.987--991

Astronomy and Astrophysics

Astronomy

Stars: Individual: An Lyncis, Stars: Variables: Δ Scuti, Techniques: Photometric

Scientific paper

We present 9 new times of light maximum of the δ Scuti star AN Lyncis based on photometric observations from the years 2008-2010. Together with 194 times of the light maximum from the literature, a detailed study of the O - C diagram with data spanning over three decades has led to a new ephemeris formula. A cyclic change in the O - C diagram is also suggested by the O - C method, where the cyclic period is about 17.7 yr. With the available data, we have found that the Fourier amplitude of AN Lyncis is changing in sync with a change of the pulsation period. Simple arguments are given for a possible mechanism affecting the cyclic change.

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