Asteroseismological measurements on PG 1159-035, the prototype of the GW Virginis variable stars
نویسندگان
چکیده
منابع مشابه
Asteroseismological 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...
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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...
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An adiabatic, nonradial pulsation study of GW Vir stars is presented. The pulsation calculations are based on PG1159 evolutionary sequences with different stellar massess artificially derived from a full evolutionary sequence of 0.5895 M⊙ that has been computed taking into account the evolutionary history of the progenitor star. The artificial sequences were constructed by appropriately scaling...
متن کاملOn the mass - loss of PG 1159 stars ?
The winds of the four PG 1159 stars NGC7094, NGC246, K 1-16 and RX J2117.1+3412 are investigated by means of non-LTE models for spherically expanding atmospheres. Based on the results of recent plane-parallel non-LTE analyses, several individual models with variousmass-loss rates are calculated. Synthetic profiles of the C iv resonance line are compared to high resolution, high quality HST and ...
متن کاملAsteroseismological constraints on the pulsating planetary nebula nucleus ( PG 1159 - type ) RX J 2117 . 1 + 3412
Aims. We present asteroseismological inferences on RXJ2117.1+3412, the hottest known pulsating PG1159 star. Our results are based on full PG1159 evolutionary models recently presented by Miller Bertolami & Althaus (2006). Methods. We performed extensive computations of adiabatic g-mode pulsation periods on PG1159 evolutionary models with stellar masses ranging from 0.530 to 0.741M⊙. PG1159 stel...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2007
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20078646