Whole Earth Telescope observations of the subdwarf B star KPD 1930+2752: a rich, short-period pulsator in a close binary
文献类型：期刊论文
| 作者 | Reed, M. D.1; Harms, S. L.1; Poindexter, S.1,2; Zhou, A. -Y.1,3; Eggen, J. R.1; Morris, M. A.1,4; Quint, A. C.1; McDaniel, S.1; Baran, A.5; Dolez, N.6 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2011-03-01 |
| 卷号 | 412期号:1页码:371-390 |
| 关键词 | binaries: close stars: general stars: oscillations subdwarfs oscillations: individual: KPD 1930+2752 |
| 英文摘要 | KPD 1930+2752 is a short-period pulsating subdwarf B (sdB) star. It is also an ellipsoidal variable with a known binary period of 2.3 h. The companion is most likely a white dwarf and the total mass of the system is close to the Chandresekhar limit. In this paper, we report the results of Whole Earth Telescope (WET) photometric observations during 2003 and a smaller multisite campaign of 2002. From 355 h of WET data, we detect 68 pulsation frequencies and suggest an additional 13 frequencies within a crowded and complex temporal spectrum between 3065 and 6343 mu Hz (periods between 326 and 157 s). We examine pulsation properties including phase and amplitude stability in an attempt to understand the nature of the pulsation mechanism. We examine a stochastic mechanism by comparing amplitude variations with simulated stochastic data. We also use the binary nature of KPD 1930+2752 for identifying pulsation modes via multiplet structure and a tidally induced pulsation geometry. Our results indicate a complicated pulsation structure that includes short-period (approximate to 16 h) amplitude variability, rotationally split modes, tidally induced modes and some pulsations which are geometrically limited on the sdB star. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000288378100032 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8041]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Missouri State Univ, Dept Phys Astron & Mat Sci, Springfield, MO 65897 USA 2.Ohio State Univ, Dept Astron, Columbus, OH 43210 USA 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 4.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA 5.Pedag Univ, Mt Suhora Observ, PL-30084 Krakow, Poland 6.Univ Toulouse, CNRS, Lab Astrophys Toulouse Tarbes, F-31400 Toulouse, France 7.Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA 8.Univ Cent Lancashire, Ctr Astrophys, Preston PR1 2HE, Lancs, England 9.Nicolaus Copernicus Astron Ctr, PL-00716 Warsaw, Poland 10.CALTECH, Pasadena, CA 91125 USA |
| 推荐引用方式 GB/T 7714 | Reed, M. D.,Harms, S. L.,Poindexter, S.,et al. Whole Earth Telescope observations of the subdwarf B star KPD 1930+2752: a rich, short-period pulsator in a close binary[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2011,412(1):371-390. |
| APA | Reed, M. D..,Harms, S. L..,Poindexter, S..,Zhou, A. -Y..,Eggen, J. R..,...&Pablo, H..(2011).Whole Earth Telescope observations of the subdwarf B star KPD 1930+2752: a rich, short-period pulsator in a close binary.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,412(1),371-390. |
| MLA | Reed, M. D.,et al."Whole Earth Telescope observations of the subdwarf B star KPD 1930+2752: a rich, short-period pulsator in a close binary".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 412.1(2011):371-390. |
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