117 citations · 718 across the 24 of their papers we have counts for
5 papers · 2 filters
The pulsation modes of the pre-white dwarf PG 1159-035
J. E. S. Costa, S. O. Kepler, D. E. Winget +74
PG 1159-035, a pre-white dwarf with T_eff=140,000 K, is the prototype of both two classes: the PG1159 spectroscopic class and the DOV pulsating class. Previous studies of PG 1159-0…
Asteroseismological measurements on PG 1159-035, the prototype of the GW Vir variable stars
A. H. Córsico, L. G. Althaus, S. O. Kepler +2
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 b…
On the systematics of asteroseismological mass determinations of PG1159 stars
L. G. Althaus, A. H. Córsico, S. O. Kepler +1
We analyze systematics in the asteroseismological mass determination methods in pulsating PG 1159 stars. We compare the seismic masses resulting from the comparison of the observed…
Asteroseismological constraints on the coolest GW Vir variable star (PG 1159-type)PG 0122+200
A. H. Córsico, M. M. Miller Bertolami, L. G. Althaus +2
We present an asteroseismological study on PG 0122+200, the coolest known pulsating PG1159 (GW Vir) star. Our results are based on an augmented set of the full PG1159 evolutionary…
Low-mass, helium-enriched PG1159 stars: a possible evolutionary origin and the implications for their pulsational stability properties
L. G. Althaus, A. H. Córsico, M. M. Miller Bertolami
We examine a recently-proposed evolutionary scenario that could explain the existence of the low-mass, helium-enriched PG1159 stars. We assess the overstability of pulsation g-mode…