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Probing the structure of Kepler ZZ Ceti stars with full evolutionary models-based asteroseismology
- Source :
- SEDICI (UNLP), Universidad Nacional de La Plata, instacron:UNLP, Repositório Institucional da UFRGS, Universidade Federal do Rio Grande do Sul (UFRGS), instacron:UFRGS, CONICET Digital (CONICET), Consejo Nacional de Investigaciones Científicas y Técnicas, instacron:CONICET
- Publication Year :
- 2017
- Publisher :
- arXiv, 2017.
-
Abstract
- We present an asteroseismological analysis of four ZZ Ceti stars observed with the Kepler spacecraft: GD 1212, SDSS J113655.17+040952.6, KIC 11911480, and KIC 4552982, based on a grid of full evolutionary models of DA white dwarf (WD) stars. We employ a grid of carbon-oxygen core models, characterized by a detailed and consistent chemical inner profile for the core and the envelope. In addition to the observed periods, we take into account other information from the observational data, such as amplitudes, rotational splittings, and period spacing, as well as photometry and spectroscopy. For each star, we present an asteroseismological model that closely reproduces their observed properties. The asteroseismological stellar mass and effective temperature of the target stars are (0.632 ± 0.027 M⊙, 10737 ± 73 K) for GD 1212, (0.745 ± 0.007 M⊙, 11110 ± 69 K) for KIC 4552982, (05480 ± 0.01 M⊙, 12,721 ± 228 K) for KIC11911480, and (0.570 ± 0.01 M⊙, 12,060 ± 300 K) for SDSS J113655.17+040952.6. In general, the asteroseismological values are in good agreement with the spectroscopy. For KIC 11911480 and SDSS J113655.17+040952.6 we derive a similar seismological mass, but the hydrogen envelope is an order of magnitude thinner for SDSS J113655.17+040952.6, which is part of a binary system and went through a common envelope phase.<br />Facultad de Ciencias Astronómicas y Geofísicas<br />Instituto de Astrofísica de La Plata
- Subjects :
- Ciencias Astronómicas
Stellar mass
Variable stars
Ciencias Físicas
FOS: Physical sciences
Astrophysics
01 natural sciences
Asteroseismology
purl.org/becyt/ford/1 [https]
Common envelope
Evolucao estelar
0103 physical sciences
010303 astronomy & astrophysics
Solar and Stellar Astrophysics (astro-ph.SR)
ZZ Ceti stars (estrella)
white dwarfs
Physics
variables: other [stars]
stars: individual (ZZ Ceti stars)
stars: variables: other
010308 nuclear & particles physics
Estrelas ZZ Ceti
White dwarfs
White dwarf
Astronomy and Astrophysics
purl.org/becyt/ford/1.3 [https]
Effective temperature
Astronomía
Stars
Photometry (astronomy)
Astrophysics - Solar and Stellar Astrophysics
Anãs brancas
Pulsacoes estelares
individual (ZZ Ceti stars) [stars]
Space and Planetary Science
Asterosismologia
Variable star
CIENCIAS NATURALES Y EXACTAS
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- SEDICI (UNLP), Universidad Nacional de La Plata, instacron:UNLP, Repositório Institucional da UFRGS, Universidade Federal do Rio Grande do Sul (UFRGS), instacron:UFRGS, CONICET Digital (CONICET), Consejo Nacional de Investigaciones Científicas y Técnicas, instacron:CONICET
- Accession number :
- edsair.doi.dedup.....9096078cb93dad771b2f9492a60eac5a
- Full Text :
- https://doi.org/10.48550/arxiv.1711.01338