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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Whole earth telescope observations of the pulsating subdwarf B Star PG 0014+067
Astrophysical Journal, Volume 646, No. 2 I, Year 2006
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Description
PG 0014+067 is one of the most promising pulsating subdwarf B stars for seismic analysis, as it has a rich pulsation spectrum. The richness of its pulsations, however, poses a fundamental challenge to understanding the pulsations of these stars, as the mode density is too complex to be explained only with radial and nonradial low-degree (l < 3) p-modes without rotational splittings. One proposed solution, suggested by Brassard et al. in 2001 for the case of PG 0014+067 in particular, assigns some modes with high degree (l - 3). On the other hand, theoretical models of sdB stars suggest that they may retain rapidly rotating cores, and so the high mode density may result from the presence of a few rotationally split triplet (l = 1) and quintuplet (l = 2) modes, along with radial (l = 0)p-modes. To examine alternative theoretical models for these stars, we need better frequency resolution and denser longitude coverage. Therefore, we observed this star with the Whole Earth Telescope for two weeks in 2004 October. In this paper we report the results of Whole Earth Telescope observations of the pulsating subdwarf B star PG 0014+067. We find that the frequencies seen in PG 0014+067 do not appear to fit any theoretical model currently available; however, we find a simple empirical relation that is able to match all of the well-determined frequencies in this star. © 2006. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Vućković, Maja
United States, Ames
Iowa State University
Belgium, Leuven
Departement Natuurkunde en Sterrenkunde
Kawaler, Steven D.
United States, Ames
Iowa State University
O'Toole, Simon J.
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Csubry, Zoltán
Hungary, Budapest
Konkoly Observatory
Baran, Andrzej S.
Poland, Krakow
Uniwersytet Pedagogiczny Im. Komisji Edukacji Narodowej
Zoła, Stanisław
Poland, Krakow
Uniwersytet Pedagogiczny Im. Komisji Edukacji Narodowej
Poland, Krakow
Uniwersytet Jagielloński
Moskalik, Pawel A.
Poland, Warszawa
Polish Academy of Sciences
Klumpe, Eric W.
United States, Murfreesboro
Middle Tennessee State University
Riddle, Reed L.
United States, Pasadena
California Institute of Technology
O'Brien, M. Sean
United States, New Haven
Yale University
Mullally, Fergal R.
United States, Austin
The University of Texas at Austin
Wood, Matt A.
United States, Melbourne
Florida Institute of Technology
Zhou, Aiying
United States, Springfield
Missouri State University
Reed, Michael D.
United States, Springfield
Missouri State University
Terndrup, Donald M.
United States, Columbus
The Ohio State University
Sullivan, Denis J.
New Zealand, Wellington
Victoria University of Wellington
Kim, Seung-lee
South Korea, Daejeon
Korea Astronomy and Space Science Institute
Chen, Wenping
Taiwan, Taoyuan
National Central University
Chen, Chinwei
Taiwan, Taoyuan
National Central University
Sanchawala, Kaushar
Taiwan, Taoyuan
National Central University
Lee, Hsutai
Taiwan, Taoyuan
National Central University
Jiang, Xiaojun
China, Beijing
Chinese Academy of Sciences
Janulis, Rimvydas
Lithuania, Vilnius
Teorinės Fizikos ir Astronomijos Institutas
Lithuania, Vilnius
Vilniaus Universitetas
Siwak, Michał
Poland, Krakow
Uniwersytet Jagielloński
Ogłoza, W.
Poland, Krakow
Uniwersytet Pedagogiczny Im. Komisji Edukacji Narodowej
Páparo, Margit
Hungary, Budapest
Konkoly Observatory
Bognár, Zs
Hungary, Budapest
Konkoly Observatory
Sódor, Ádám
Hungary, Budapest
Konkoly Observatory
Handler, Gerald
Austria, Vienna
Institut Für Astrophysik
Lorenz, D.
Austria, Vienna
Institut Für Astrophysik
Silvotti, R.
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Vauclair, Gérard P.
France, Toulouse
Observatoire Midi-pyrénées
Østensen, R.
Spain, Santa Cruz de la Palma
Isaac Newton Group
Bronowska, Agnieszka Katarzyna
Spain, Santa Cruz de la Palma
Isaac Newton Group
Castanheira, Bárbara Garcia
Brazil, Porto Alegre
Universidade Federal do Rio Grande do Sul
Kepler, Souza Oliveira
Brazil, Porto Alegre
Universidade Federal do Rio Grande do Sul
Fraga, Luciano
Brazil, Florianopolis
Universidade Federal de Santa Catarina
Shipman, Harry L.
United States, Newark
University of Delaware
Provençal, Judith L.
United States, Newark
University of Delaware
Childers, Daniel P.
United States, Newark
University of Delaware
Statistics
Citations: 13
Authors: 40
Affiliations: 28
Identifiers
Doi:
10.1086/505137
ISSN:
0004637X
Research Areas
Health System And Policy