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Whole Earth Telescope observations of the pulsating subdwarf B star PG 0014+067
Vuckovic, M.; Kawaler, S. D.; O'Toole, S.; Csubry, Z.; Baran, A.; Zola, S.; Moskalik, P.; Klumpe, E. W.; Riddle, R.; O'Brien, M. S.; Mullally, F.; Wood, M. A.; Wilkat, V.; Zhou, A. -Y.; Reed, M. D.; Terndrup, D. M.; Sullivan, D. J.; Kim, S. -L.; Chen, W. P.; Chen, C. -W.; Hsiao, W. -S.; Sanchawala, K.; Lee, H. -T.; Jiang, X. J.; Janulis, R.; Siwak, M.; Ogloza, W.; Paparo, M.; Bognar, Zs.; Sodor, A.; Handler, G.; Lorenz, D.; Steininger, B.; Silvotti, R.; Vauclair, G.; Oreiro, R.; Ostensen, R.; Bronowska, A.; Castanheira, B. G.; Kepler, S. O.; Fraga, L.; Shipman, H. L.; Provencal, J. L.; Childers, D.
AbstractPG 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.
KeywordStars : Individual (Pg 0014+067) Stars : Oscillations Subdwarfs
Indexed BySCI
WOS IDWOS:000239647400046
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Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA
2.Sterrekundig Inst, B-3001 Heverlee, Belgium
3.Univ Erlangen Nurnberg, Astron Inst, D-96049 Bamberg, Germany
4.Konkoly Observ Budapest, H-1525 Budapest, Hungary
5.Cracow Pedagog Univ, Mt Suhora Observ, PL-30084 Krakow, Poland
6.Jagiellonian Univ, Astron Observ, PL-30244 Krakow, Poland
7.Polish Acad Sci, Nicolas Copernicus Astron Ctr, PL-00716 Warsaw, Poland
8.Middle Tennessee State Univ, Dept Phys & Astron, Murfreesboro, TN 37132 USA
9.CALTECH, Pasadena, CA 91125 USA
10.Yale Univ, Dept Astron, New Haven, CT 06851 USA
11.Univ Texas, Dept Astron, Austin, TX 78712 USA
12.Florida Inst Technol, Dept Phys & Space Sci, Melbourne, FL 32901 USA
13.Florida Inst Technol, SARA Observ, Melbourne, FL 32901 USA
14.Missouri State Univ, Dept Phys Astron & Mat Sci, Springfield, MO 65897 USA
15.Ohio State Univ, Dept Astron, Columbus, OH 43210 USA
16.Victoria Univ Wellington, Dept Phys, Wellington, New Zealand
17.Korea Astron & Space Sci Inst, Taejon 305348, South Korea
18.Natl Cent Univ, Inst Astron, Chungli 32054, Taiwan
19.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
20.Inst Theoret Phys & Astron, LT-2600 Vilnius, Lithuania
21.Vilnius Univ, Astron Observ, LT-2009 Vilnius, Lithuania
22.Inst Astron, A-1180 Vienna, Austria
23.INAF, Osservatorio Astron Capodimonte, I-80131 Naples, Italy
24.Univ Toulouse 3, Observ Midi Pyrenees, F-31400 Toulouse, France
25.Univ Vigo, Dept Fis Aplicada, Vigo 36200, Spain
26.Isaac Newton Grp Telescopes, Santa Cruz De La Palma 37800, Canary Isl, Spain
27.Univ Fed Rio Grande Sul, Inst Fis, BR-91501900 Porto Alegre, RS, Brazil
28.Univ Fed Santa Catarina, Dept Fis, Florianopolis, SC, Brazil
29.Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Recommended Citation
GB/T 7714
Vuckovic, M.,Kawaler, S. D.,O'Toole, S.,et al. Whole Earth Telescope observations of the pulsating subdwarf B star PG 0014+067[J]. ASTROPHYSICAL JOURNAL,2006,646(2):1230-1240.
APA Vuckovic, M..,Kawaler, S. D..,O'Toole, S..,Csubry, Z..,Baran, A..,...&Childers, D..(2006).Whole Earth Telescope observations of the pulsating subdwarf B star PG 0014+067.ASTROPHYSICAL JOURNAL,646(2),1230-1240.
MLA Vuckovic, M.,et al."Whole Earth Telescope observations of the pulsating subdwarf B star PG 0014+067".ASTROPHYSICAL JOURNAL 646.2(2006):1230-1240.
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