Is 44 Tau in the post-MS contraction phase?

Details Is 44 Tau in the post-MS contraction phase? Is 44 Tau in the post-MS contraction phase?

2009-09-25

arxiv.org/abs/0909.4631v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

3 pages, 2 figures, Stellar Pulsation: Challenges for Theory and Observation, Santa Fe, NM, 31 May - 5 June, 2009

Scientific paper

The evolutionary stage of the delta Scuti star 44 Tau has been unclear. Recent pulsation studies have claimed both main sequence and post-main sequence expansion models. A new photometric study increased the number of detected frequencies in 44 Tau to 49, of which 15 are independent modes. We now find that a previously ignored third possibility, the post-main sequence contraction phase, is in excellent agreement with the observed frequency range, as well as the frequency values of all individual radial and nonradial modes. These results resolve the previous disagreements in the literature and exemplify that asteroseismology can determine the evolutionary status of a star.

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