Discovery of Iron-K Absorption Lines from the Transient Jets GRS 1915+105 and GRO J1655-40
著者
和文:
Kotani, T.,
Ebisawa, K.,
Inoue, H.,
河合 誠之,
Matsuoka, M.,
Nagase, F.,
Robinson, C. R.,
Takeshima, T.,
Ueda, Y.,
Yamaoka, K.,
Yoshida, A..
英文:
Kotani, T.,
Ebisawa, K.,
Inoue, H.,
Kawai, N.,
Matsuoka, M.,
Nagase, F.,
Robinson, C. R.,
Takeshima, T.,
Ueda, Y.,
Yamaoka, K.,
Yoshida, A..
言語
English
掲載誌/書名
和文:
英文:
Advances in Space Research
巻, 号, ページ
Vol. 25
pp. 445-448
出版年月
2000年
出版者
和文:
英文:
会議名称
和文:
英文:
開催地
和文:
英文:
アブストラクト
K-line absorption features of highly ionized iron were discovered in X-ray spectra of super-luminal transient jets GRS 1915+105 and GRO J1655-40 with ASCA. The absorption lines were identified as Fe xxv Kα, Fe xxvI Kα, and Ni xxvII Kα resonance lines with equivalent width of 20-50 eV. They are evidence of highly ionized plasma in anisotropic configuration or in anisotropic illumination in the vicinity of the source. We adopted models of photoionized plasma with a cylindrical geometry, and estimated physical parameters such as density, dimension, solid angle from the source, temperature and ξ-parameter. It is suggested that the kinetic temperature of resonant scattering atoms is very high, at least 100 keV
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