Is 44 Tau in the post-MS contraction phase?

The evolutionary stage of the 8 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 t...

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Bibliographic Details
Main Authors: Lenz, Patrick, Pamyatnykh, Alexey A, Breger, Michel
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:The evolutionary stage of the 8 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.
ISSN:0094-243X
DOI:10.1063/1.3246540