Seismology of a massive pulsating hydrogen atmosphere white dwarf

We report our observations of the new pulsating hydrogen atmosphere white dwarf SDSS J132350.28+010304.22. We discovered periodic photometric variations in frequency and amplitude that are commensurate with nonradial g-mode pulsations in ZZ Ceti stars. This, along with estimates for the star's...

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Autores principales: Kepler, S. O., Pelisoli, Ingrid, Peçanha, Viviane, Costa, J. E. S., Fraga, Luciano, Hermes, J. J., Winget, D. E., Castanheira, Barbara, Córsico, Alejandro Hugo, Romero, Alejandra Daniela, Althaus, Leandro Gabriel, Kleinman, S. J., Nitta, A., Koester, D., Külebi, Baybars, Jordan, Stefan, Kanaan, Antonio
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Ciencias Astronómicas
stars: fundamental parameters
stars: oscillations
white dwarfs
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84986
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84986
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
stars: fundamental parameters
stars: oscillations
white dwarfs
spellingShingle Ciencias Astronómicas
stars: fundamental parameters
stars: oscillations
white dwarfs
Kepler, S. O.
Pelisoli, Ingrid
Peçanha, Viviane
Costa, J. E. S.
Fraga, Luciano
Hermes, J. J.
Winget, D. E.
Castanheira, Barbara
Córsico, Alejandro Hugo
Romero, Alejandra Daniela
Althaus, Leandro Gabriel
Kleinman, S. J.
Nitta, A.
Koester, D.
Külebi, Baybars
Jordan, Stefan
Kanaan, Antonio
Seismology of a massive pulsating hydrogen atmosphere white dwarf
topic_facet Ciencias Astronómicas
stars: fundamental parameters
stars: oscillations
white dwarfs
description We report our observations of the new pulsating hydrogen atmosphere white dwarf SDSS J132350.28+010304.22. We discovered periodic photometric variations in frequency and amplitude that are commensurate with nonradial g-mode pulsations in ZZ Ceti stars. This, along with estimates for the star's temperature and gravity, establishes it as a massive ZZ Ceti star. We used time-series photometric observations with the 4.1m SOAR Telescope, complemented by contemporary McDonald Observatory 2.1m data, to discover the photometric variability. The light curve of SDSS J132350.28+010304.22 shows at least nine detectable frequencies. We used these frequencies to make an asteroseismic determination of the total mass and effective temperature of the star: M= 0.88 ± 0.02 M and T eff = 12, 100 ± 140 K. These values are consistent with those derived from the optical spectra and photometric colors.
format Articulo
Articulo
author Kepler, S. O.
Pelisoli, Ingrid
Peçanha, Viviane
Costa, J. E. S.
Fraga, Luciano
Hermes, J. J.
Winget, D. E.
Castanheira, Barbara
Córsico, Alejandro Hugo
Romero, Alejandra Daniela
Althaus, Leandro Gabriel
Kleinman, S. J.
Nitta, A.
Koester, D.
Külebi, Baybars
Jordan, Stefan
Kanaan, Antonio
author_facet Kepler, S. O.
Pelisoli, Ingrid
Peçanha, Viviane
Costa, J. E. S.
Fraga, Luciano
Hermes, J. J.
Winget, D. E.
Castanheira, Barbara
Córsico, Alejandro Hugo
Romero, Alejandra Daniela
Althaus, Leandro Gabriel
Kleinman, S. J.
Nitta, A.
Koester, D.
Külebi, Baybars
Jordan, Stefan
Kanaan, Antonio
author_sort Kepler, S. O.
title Seismology of a massive pulsating hydrogen atmosphere white dwarf
title_short Seismology of a massive pulsating hydrogen atmosphere white dwarf
title_full Seismology of a massive pulsating hydrogen atmosphere white dwarf
title_fullStr Seismology of a massive pulsating hydrogen atmosphere white dwarf
title_full_unstemmed Seismology of a massive pulsating hydrogen atmosphere white dwarf
title_sort seismology of a massive pulsating hydrogen atmosphere white dwarf
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/84986
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