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Suzaku discovery of hard X-ray pulsations from a rotating magnetized white dwarf, AE Aquarii
https://sucra.repo.nii.ac.jp/records/13270
https://sucra.repo.nii.ac.jp/records/13270bfbf3ab9-a186-4ae4-9d60-418ee4e7bfea
名前 / ファイル | ライセンス | アクション |
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A1002692.pdf (1.1 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2008-06-03 | |||||
タイトル | ||||||
タイトル | Suzaku discovery of hard X-ray pulsations from a rotating magnetized white dwarf, AE Aquarii | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | acceleration of particles | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | stars : white dwarfs | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | X-rays : individual (AE Aquarii) | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
寺田, 幸功
× 寺田, 幸功 |
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著者 ローマ字 | ||||||
Terada, Yukikatsu | ||||||
著者 ローマ字 | ||||||
Hayashi, Takayuki | ||||||
著者 ローマ字 | ||||||
Ishida, Manabu | ||||||
著者 ローマ字 | ||||||
Mukai, Koji | ||||||
著者 ローマ字 | ||||||
Dotani, Tadayasu | ||||||
著者 ローマ字 | ||||||
Okada, Shunsaku | ||||||
著者 ローマ字 | ||||||
Nakamura, Ryoko | ||||||
著者 ローマ字 | ||||||
Naik, Sachindra | ||||||
著者 ローマ字 | ||||||
Bamba, Aya | ||||||
著者 ローマ字 | ||||||
Makishima, Kazuo | ||||||
著者 所属 | ||||||
埼玉大学大学院理工学研究科物質科学部門 | ||||||
著者 所属(別言語) | ||||||
Graduate School of Science and Engineering, Saitama University | ||||||
書誌情報 |
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 巻 60, 号 2, p. 387-397, 発行日 2008 |
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年月次 | ||||||
2008 | ||||||
出版者名 | ||||||
出版者 | 社団法人日本天文学会 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00046264 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | A fast rotating magnetized white dwarf, AE Aquarii, was observed with Suzaku, in 2005 October-November and 2006 October with exposures of 53.1 and 42.4ks, respectively. In addition to clear spin modulation in the 0.5-10 keV band of the XIS data at the barycentric period of 33.0769 +/- 0.0001 s, the 10-30 keV HXD data in the second half of the 2005 observation also showed statistically significant periodic signals at a consistent period. On that occasion, the spin-folded HXD light curve exhibited two sharp spikes separated by similar to 0.2 cycles in phase, in contrast to approximately sinusoidal profiles observed at energies below similar to 4 keV. The folded 4-10 keV XIS light curves are understood to be a superposition of those two types of pulse profiles. The phase-averaged 1.5-10 keV spectra can be reproduced by two thermal components with temperatures of 2.0(-0.16)(+0.20) keV and 0.53(-0.13)(+0.14) keV but the 12-25 keV HXD data show a significant excess above the extrapolated model. This excess can be explained by either a power-law model with a photon index of 1.12(-0.62)(+0.63) or a third thermal component with a temperature of 54(-47)(+26) keV. At a distance of 102pc, the 4-30keV luminosities of the thermal and the additional components become 1.7(-0.6)(+1.3) and 5.3(-0.3)(+15.3) X 10(29) erg s(-1), respectively. The latter corresponds to 0.09% of the spin-down energy of the object. Possible emission mechanisms of the hard pulsations are discussed, including non-thermal ones, in particular. | |||||
版 | ||||||
[著者版] | ||||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
資源タイプ | ||||||
内容記述タイプ | Other | |||||
内容記述 | text | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
作成日 | ||||||
日付 | 2008-06-03 | |||||
日付タイプ | Created | |||||
アイテムID | ||||||
A1002692 |