Kepler K2 observations of the intermediate polar FO Aquarii
文献类型：期刊论文
| 作者 | Kennedy, M. R.1,2; Garnavich, P.2; Breedt, E.3; Marsh, T. R.3; Gansicke, B. T.3; Steeghs, D.3; Szkody, P.4; Dai ZB(戴智斌)5,6
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2016-07-11 |
| 卷号 | 459期号:4页码:3622-3628 |
| ISSN号 | 0035-8711 |
| 关键词 | accretion accretion discs magnetic fields - eclipses novae cataclysmic variables white dwarfs |
| 通讯作者 | Kennedy, MR |
| 产权排序 | 第五完成单位 |
| 英文摘要 | We present photometry of the intermediate polar FO Aquarii (FO Aqr) obtained as part of the K2 mission using the Kepler space telescope. The amplitude spectrum of the data confirms the orbital period of 4.8508(4) h, and the shape of the light curve is consistent with the outer edge of the accretion disc being eclipsed when folded on this period. The average flux of FO Aqr changed during the observations, suggesting a change in the mass accretion rate. There is no evidence in the amplitude spectrum of a longer period that would suggest disc precession. The amplitude spectrum also shows the white dwarf spin period of 1254.3401(4) s, the beat period of 1351.329(2) s, and 31 other spin and orbital harmonics. The detected period is longer than the last reported period of 1254.284(16) s, suggesting that FO Aqr is now spinning down, and has a positive (P)over dot. There is no detectable variation in the spin period over the course of the K2 observations, but the phase of the spin cycle is correlated with the system brightness. We also find that the amplitude of the beat signal is correlated with the system brightness. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | MAGNETIC NEUTRON-STARS ; DQ HERCULIS STARS ; RMS-FLUX RELATION ; CATACLYSMIC VARIABLES ; CCD PHOTOMETRY ; WHITE-DWARF ; SPIN EPHEMERIDES ; DISK ACCRETION ; SPACED DATA ; H2215-086 |
| 收录类别 | SCI |
| 原文出处 | http://mnras.oxfordjournals.org/content/459/4/3622 |
| 语种 | 英语 |
| WOS记录号 | WOS:000379830700020 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/9717]  |
| 专题 | 云南天文台_双星与变星研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Department of Physics, University College Cork, Cork, T12 ND89, Ireland 2.Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USA 3.Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK 4.Department of Astronomy, University of Washington, Seattle, WA 98195-1580, USA 5.Yunnan Observatories, Chinese Academy of Sciences, Guandu, Kunming 650011, Yunnan, China 6.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Guandu, Kunming 650011, Yunnan, China |
| 推荐引用方式 GB/T 7714 | Kennedy, M. R.,Garnavich, P.,Breedt, E.,et al. Kepler K2 observations of the intermediate polar FO Aquarii[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,459(4):3622-3628. |
| APA | Kennedy, M. R..,Garnavich, P..,Breedt, E..,Marsh, T. R..,Gansicke, B. T..,...&Dai ZB.(2016).Kepler K2 observations of the intermediate polar FO Aquarii.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,459(4),3622-3628. |
| MLA | Kennedy, M. R.,et al."Kepler K2 observations of the intermediate polar FO Aquarii".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 459.4(2016):3622-3628. |
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来源：云南天文台
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