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- Consejo Nacional de Investigaciones Científicas y TécnicasAR636 papers
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14 papers · 1 filter
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…
The environs of the HII region Gum31
C. Cappa, V. S. Niemela, R. Amorin +1
We analyze the distribution of the interstellar matter in the environs of the HII region Gum31, excited by the open cluster NGC3324, located in the complex Carina region, with the…
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…
White Dwarf Luminosity and Mass Functions from Sloan Digital Sky Survey Spectra
Steven DeGennaro, Ted von Hippel, D. E. Winget +4
We present the first phase in our ongoing work to use Sloan Digital Sky Survey (SDSS) data to create separate white dwarf (WD) luminosity functions for two or more different mass r…
Oligarchic planetesimal accretion and giant planet formation
A. Fortier, O. G. Benvenuto, A. Brunini
Aims. In the context of the core instability model, we present calculations of in situ giant planet formation. The oligarchic growth regime of solid protoplanets is the model adopt…