Asteroseismology of the DOV star PG 1159 - 035 with the Whole Earth Telescope
نویسندگان
چکیده
منابع مشابه
The Spectral Variability of Pulsating Stars : PG 1159 - 035
With 10m class telescopes as well as with time-tagging detectors on board of HST and FUSE, the analysis of time-resolved spectra for pulsating white dwarfs becomes feasible. We present simulated time-resolved spectra for the hot pulsating white dwarf PG 1159-035 and compare these models with observational data of the 516 s mode based on HST-STIS spectroscopy. A determination of the pulsation mo...
متن کاملAsteroseismological measurements on PG 1159−035, the prototype of the GW Vir variable stars
Aims. An asteroseismological study of PG 1159−035, the prototype of the GW Vir variable stars, has been performed on the basis of detailed and full PG1159 evolutionary models presented by Miller Bertolami & Althaus (2006). Methods. We carried out extensive computations of adiabatic g-mode pulsation periods on PG1159 evolutionary models with stellar masses spanning the range 0.530 to 0.741M⊙. Th...
متن کاملThe pulsation modes of the pre - white dwarf PG 1159 - 035
Context. PG 1159-035, a pre-white dwarf with Teff ≃ 140 000 K, is the prototype of both two classes: the PG 1159 spectroscopic class and the DOV pulsating class. Previous studies of PG 1159-035 photometric data obtained with the Whole Earth Telescope (WET) showed a rich frequency spectrum allowing the identification of 122 pulsation modes. Analyzing the periods of pulsation, it is possible to m...
متن کاملAsteroseismology of hot pre - white dwarf stars : the case of the DOV stars PG 2131 + 066 and PG 1707 + 427 , and the PNNV star NGC 1501
Aims. We present an asteroseismological study on the two high-gravity pulsating PG1159 (GW Vir or DOV) stars, PG 2131+066 and PG 1707+427, and on the pulsating [WCE] star NGC 1501. All of these stars have been intensively scrutinized through multi-site observations, so they have well resolved pulsation spectra. Methods. We compute adiabatic g-mode pulsation periods on PG1159 evolutionary models...
متن کاملHigh-resolution ultraviolet spectroscopy of PG 1159−035 with HST and FUSE
PG 1159−035 is the prototype of the PG1159 spectral class which consists of extremely hot hydrogen-deficient (pre) white dwarfs. It is also the prototype of the GW Vir variables, which are non-radial g-mode pulsators. The study of PG1159 stars reveals insight into stellar evolution and nucleosynthesis during AGB and post-AGB phases.
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1991
ISSN: 0004-637X,1538-4357
DOI: 10.1086/170434