44 Tau: Examination of amplitude variability and combination frequencies

Details 44 Tau: Examination of amplitude variability and combination frequencies 44 Tau: Examination of amplitude variability and combination frequencies

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008coast.157..292b&link_type=abstract

Communications in Asteroseismology, Vol.157, p. 292

Mathematics

Probability

Scientific paper

The Delta Scuti Network has observed the slowly rotating δ Scuti star 44 Tau for five seasons during 2000-2006. All ℓ=1 modes exhibit strong annual amplitude variations, while the radial modes have constant (or nearly constant) amplitudes. We examined the probability of different amplitude modulation mechanisms to be responsible for the observed amplitude variability. The amplitudes of the combination frequencies, fi + fj , mirror the variations of the parent modes. The relationship between the amplitudes of the combination frequencies and their parents is found to be constant (µ=0.003) for the combinations involving the radial fundamental and different ℓ=1 modes. The details of the results presented in this poster have in the meantime been published (Breger, M. & Lenz, P. 2008, A&A, 488, 643).

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