AC And-type variables

Details AC And-type variables AC And-type variables

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aspc..256..145r&link_type=abstract

Observational Aspects of Pulsating B- and A Stars, ASP Conference Proceedings, Vol. 256. Edited by Christiaan Sterken and Donal

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Stars with masses of 3 Mo or more cross the classical instability strip as they evolve from the main sequence towards the giant branch. These stars with periods of pulsation typical of RR Lyrae variables nevertheless show the properties of delta Scuti pulsators because of the identical stage of evolution. These objects are suggested to be the link between the delta Sct and classical Cepheids variables. The most prominent example is the star AC And, which shows three simultaneously excited pulsation periods together with a large number of harmonics and combinations between the three main frequencies. A search for massive, long-period delta Scuti pulsators similar to the triple-mode variable AC And is carried out.

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