Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995dssn....9...14b&link_type=abstract
Delta Scuti Star Newsletter, Issue 9, p. 14-17.
Astronomy and Astrophysics
Astronomy
3
Scientific paper
Investigators researching Delta Scuti stars have to live with a smaller number of detected pulsation frequencies than the astronomers studying white dwarfs and PG 1159-035 stars. For example, for the star PG 1159-035 over 200 pulsation frequencies are known, while below we are pleased to report a new record for Delta Scuti stars: 19 frequencies for FG Vir. The situation, however, is not as bleak for Delta Scuti stars as it may appear. In white dwarfs, due to the high order of the excited pulsation modes in this star, the values of the frequencies obey the asymptotic limits of frequency spacing. Consequently, a certain amount of redundancy is present. This is not the case for the Delta Scuti stars, where every single newly discovered frequency provides additional, almost independent information on low-order p and g mode pulsation, allowing refinements of the models.
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