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dc.contributor.author
Costa, J. E. S.
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Kepler, S. O.
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Winget, D. E.
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O'Brien, M. S.
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Kawaler, S. D.
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Costa, A. F. M.
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Giovannini, O.
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Kanaan, A.
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Mukadam, A. S.
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Mullally, F.
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Nitta, A.
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Provençal, J. L.
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Shipman, H.
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Wood, M. A.
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Ahrens, T. J.
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Grauer, A.
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Kilic, M.
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Bradley, P. A.
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Sekiguchi, K.
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Crowe, R.
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Jiang, X. J.
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Sullivan, D.
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Sullivan, T.
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Rosen, R.
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Clemens, J. C.
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Janulis, R.
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O'Donoghue, D.
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Ogloza, W.
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Baran, A.
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Silvotti, R.
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Marinoni, S.
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Vauclair, G.
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Dolez, N.
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Chevreton, M.
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Dreizler, S.
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Schuh, S.
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Deetjen, J.
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Nagel, T.
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Solheim, J.-E.
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González Pérez, J. M.
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Althaus, Leandro Gabriel
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Corsico, Alejandro Hugo
dc.date.available
2018-05-11T14:30:55Z
dc.date.issued
2008-12
dc.identifier.citation
Costa, J. E. S.; Kepler, S. O.; Winget, D. E.; O'Brien, M. S.; Kawaler, S. D.; et al.; The pulsation modes of the pre-white dwarf PG 1159-035; EDP Sciences; Astronomy and Astrophysics; 477; 2; 12-2008; 627-640
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/44898
dc.description.abstract
Context.PG 1159-035, a pre-white dwarf with 140 000 K, is the prototype of both two classes: the PG 1159 spectroscopic class and the DOV pulsating class. Previous studies of PG 1159-035 photometric data obtained with the Whole Earth Telescope (WET) showed a rich frequency spectrum allowing the identification of 122 pulsation modes. Analyzing the periods of pulsation, it is possible to measure the stellar mass, the rotational period and the inclination of the rotation axis, to estimate an upper limit for the magnetic field, and even to obtain information about the inner stratification of the star. Aims.We have three principal aims: to increase the number of detected and identified pulsation modes in PG 1159-035, study trapping of the star's pulsation modes, and to improve or constrain the determination of stellar parameters. Methods.We used all available WET photometric data from 1983, 1985, 1989, 1993 and 2002 to identify the pulsation periods. Results.We identified 76 additional pulsation modes, increasing to 198 the number of known pulsation modes in PG 1159-035, the largest number of modes detected in any star besides the Sun. From the period spacing we estimated a mass = 0.59 ± 0.02 for PG 1159-035, with the uncertainty dominated by the models, not the observation. Deviations in the regular period spacing suggest that some of the pulsation modes are trapped, even though the star is a pre-white dwarf and the gravitational settling is ongoing. The position of the transition zone that causes the mode trapping was calculated at = 0.83 ± 0.05. From the multiplet splitting, we calculated the rotational period Prot = 1.3920 ± 0.0008 days and an upper limit for the magnetic field, G. The total power of the pulsation modes at the stellar surface changed less than 30% for = 1 modes and less than 50% for = 2 modes. We find no evidence of linear combinations between the 198 pulsation mode frequencies. PG 1159-035 models have not significative convection zones, supporting the hypothesis that nonlinearity arises in the convection zones in cooler pulsating white dwarf stars.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Oscillations
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Pg 1159-035 (Estrella)
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Interior Stars
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White Dwarfs
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
The pulsation modes of the pre-white dwarf PG 1159-035
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-04-23T15:37:14Z
dc.journal.volume
477
dc.journal.number
2
dc.journal.pagination
627-640
dc.journal.pais
Francia
dc.journal.ciudad
Les Ulis Cedex
dc.description.fil
Fil: Costa, J. E. S.. Universidade Federal do Rio Grande do Sul; Brasil
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Fil: Kepler, S. O.. Universidade Federal do Rio Grande do Sul; Brasil
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Fil: Winget, D. E.. University of Texas at Austin; Estados Unidos
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Fil: O'Brien, M. S.. University of Yale; Estados Unidos
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Fil: Kawaler, S. D.. Iowa Steate University; Estados Unidos
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Fil: Costa, A. F. M.. Universidade Federal do Rio Grande do Sul; Brasil
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Fil: Giovannini, O.. Universidade Federal do Rio Grande do Sul; Brasil
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Fil: Kanaan, A.. Universidade Federal de Santa Catarina; Brasil
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Fil: Mukadam, A. S.. University of Washington; Estados Unidos
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Fil: Mullally, F.. University of Texas at Austin; Estados Unidos
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Fil: Nitta, A.. Gemini Observatory; Estados Unidos
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Fil: Provençal, J. L.. University of Delaware; Estados Unidos
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Fil: Shipman, H.. University of Delaware; Estados Unidos
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Fil: Wood, M. A.. Florida Institute of Technology; Estados Unidos
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Fil: Ahrens, T. J.. Florida Institute of Technology; Estados Unidos
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Fil: Grauer, A.. University of Arkansas at Little Rock; Estados Unidos
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Fil: Kilic, M.. Ohio State University; Estados Unidos
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Fil: Bradley, P. A.. Los Alamos National Laboratory; Estados Unidos
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Fil: Sekiguchi, K.. Subaru National Astronomical Observatory of Japan; Japón
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Fil: Crowe, R.. University of Hawaii; Estados Unidos
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Fil: Jiang, X. J.. Chinese Academy of Sciences; República de China
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Fil: Sullivan, D.. University of Victoria; Nueva Zelanda
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Fil: Sullivan, T.. University of Victoria; Nueva Zelanda
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Fil: Rosen, R.. University of Victoria; Nueva Zelanda
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Fil: Clemens, J. C.. University of North Carolina; Estados Unidos
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Fil: Janulis, R.. VU Institute of Theoretical Physics and Astronomy; Lituania
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Fil: O'Donoghue, D.. South African Astronomical Observatory; Sudáfrica
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Fil: Ogloza, W.. Cracow Pedagogical University; Polonia
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Fil: Baran, A.. Cracow Pedagogical University; Polonia
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Fil: Silvotti, R.. Osservatorio Astronomico di Capodimonte; Italia
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Fil: Marinoni, S.. Osservatorio Astronomico di Bologna; Italia
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Fil: Vauclair, G.. Université Paul Sabatier; Francia
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Fil: Dolez, N.. Université Paul Sabatier; Francia
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Fil: Chevreton, M.. Observatoire de Paris-Meudon; Francia
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Fil: Dreizler, S.. Institut für Astrophysik; Alemania
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Fil: Schuh, S.. Institut für Astrophysik; Alemania
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Fil: Deetjen, J.. Institut für Astrophysik; Alemania
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Fil: Nagel, T.. Institut für Astrophysik; Alemania
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Fil: Solheim, J.-E.. Universitetet i Tromsø; Noruega
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Fil: González Pérez, J. M.. Universitetet i Tromsø; Noruega
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Fil: Althaus, Leandro Gabriel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
dc.description.fil
Fil: Corsico, Alejandro Hugo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
dc.journal.title
Astronomy and Astrophysics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361:20053470
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2008/02/aa3470-05/aa3470-05.html
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