Murakami, T.,
Inoue, H.,
河合 誠之,
Koyama, K.,
Makishima, K.,
Matsuoka, M.,
Oda, M.,
Ogawara, Y.,
Ohashi, T.,
Shibazaki, N.,
Tanaka, Y.,
Hayakawa, S.,
Kunieda, H.,
Makino, F.,
Masai, K.,
Nagase, F.,
Tawara, Y.,
Miyamoto, S.,
Tsunemi, H.,
Yamashita, K.,
Kondo, I..
英文:
Murakami, T.,
Inoue, H.,
Kawai, N.,
Koyama, K.,
Makishima, K.,
Matsuoka, M.,
Oda, M.,
Ogawara, Y.,
Ohashi, T.,
Shibazaki, N.,
Tanaka, Y.,
Hayakawa, S.,
Kunieda, H.,
Makino, F.,
Masai, K.,
Nagase, F.,
Tawara, Y.,
Miyamoto, S.,
Tsunemi, H.,
Yamashita, K.,
Kondo, I..
言語
English
掲載誌/書名
和文:
英文:
Astrophysical Journal
巻, 号, ページ
Vol. 264
pp. 563-567
出版年月
1983年1月
出版者
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英文:
会議名称
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英文:
開催地
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英文:
アブストラクト
The binary X-ray pulsar Cen X-3 was observed by the X-ray astronomy satellite Hakucho between 1981 March 21 - 26. A pulsation period of 4.8317231 ± 0.0000004 s and an orbital epoch of JD 2,444,686.44760 ± 0d.00005 were obtained from the pulse-timing analysis. The long-term spin-up rate in the pulsation period of Cen X-3 between 1977 and 1981 shows a decrease by a factor of 5 from that in 1975. The orbital period of 2.0871061 ± 0d.0000002 averaged between 1979 and 1981 exhibits a small but significant decrease. The present result confirms the trend of steady decrease of the orbital period. Possible mechanisms for the decrease of the pulsar spin-up rate and the decrease in the orbital period of Cen X-3 are discussed.
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