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論文・著書情報
| タイトル |
| 和文: | |
| 英文: | Observations of the peculiar hard X-ray transient X0331 + 53 (V0332 + 53) |
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| 著者 |
| 和文: |
Makishima, K.,
Ohashi, T.,
河合 誠之,
Matsuoka, M.,
Koyama, K.,
Kunieda, H.,
Tawara, Y.,
Ushimaru, N.,
Corbet, R. H. D.,
Inoue, H.,
Kii, T.,
Makino, F.,
Mitsuda, K.,
Murakami, T.,
Nagase, F.,
Ogawara, Y.,
Tanaka, Y.,
Kitamoto, S.,
Miyamoto, S.,
Tsunemi, H.,
Yamashita, K..
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| 英文: |
Makishima, K.,
Ohashi, T.,
Kawai, N.,
Matsuoka, M.,
Koyama, K.,
Kunieda, H.,
Tawara, Y.,
Ushimaru, N.,
Corbet, R. H. D.,
Inoue, H.,
Kii, T.,
Makino, F.,
Mitsuda, K.,
Murakami, T.,
Nagase, F.,
Ogawara, Y.,
Tanaka, Y.,
Kitamoto, S.,
Miyamoto, S.,
Tsunemi, H.,
Yamashita, K..
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| 言語 |
English |
| 掲載誌/書名 |
| 和文: | |
| 英文: | Publications of the Astronomical Society of Japan |
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巻, 号, ページ
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Vol. 42
pp. 295-315
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| 出版年月 |
1990年4月 |
| 出版者 |
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| 会議名称 |
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| 開催地 |
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| アブストラクト |
Tenma observations were made of the transient 4.4-s X-ray pulsar X0331 + 53 (V0332 + 53) at several phases of its 34-d binary orbit during the period November 1983-January 1984. The measured X-ray flux and pulse periods agree with those obtained with Exosat. Rapid random fluctuations in the X-ray emission from this source were studied. It appears this type of variability is not rare among accreting pulsars, but is particularly noticeable in X0331 + 53 due to the small pulse fraction. The X-ray spectra show a turn-over above about 15 keV, which is better described by a recently introduced cyclotron absorption formula than the commonly used exponential cutoff model. In terms of this model, a magnetic field strength of about 3 x 10 to the 12th G is suggested for X0331 + 53. The absence of iron K-emission lines in the spectra indicates a rather small circumstellar matter density. This, together with the observed high luminosity (about 3 x 10 to the 36th erg/s) and large intensity modulation along the orbit, suggests that the pulsar is powered by accretion from the equatorial envelope of the supposedly Be-type primary (BQ Cam). |
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