Asteroseismological Modeling of PG 1159-035, the Prototype of the GW Vir Variable Stars

Details Asteroseismological Modeling of PG 1159-035, the Prototype of the GW Vir Variable Stars Asteroseismological Modeling of PG 1159-035, the Prototype of the GW Vir Variable Stars

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..391..199c&link_type=abstract

Hydrogen-Deficient Stars ASP Conference Series, Vol. 391, proceedings of the conference held 17-21 September, 2007, at Eberhard

Mathematics

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Scientific paper

We present a comprehensive asteroseismological study on PG 1159-035, the prototype of the GW Vir variable stars, performed on the basis of full PG1159 evolutionary models with stellar masses in the range 0.530 - 0.741 M&sun;. We infer the stellar mass of PG1159-035 from the period spacing data. We also derive, on the basis of a period-fit procedure, an asteroseismological model representative of PG1159-035 which reproduces the observed period pattern with an average of the period differences of 0.62-1.02 s. The model has an effective temperature of 128 000 K, a stellar mass 0.565 M&sun;, a surface gravity log g= 7.42, and a He-rich envelope thickness of Menv= 0.017 M&sun;.

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