ブラックホール近傍からのX線放射(X線とγ線,理論天文学の新展開-大型観測計画とともに,研究会報告)

概要

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ISAS has so far launched four X-ray astronomy satellites. The first small X-ray astronomy satellite Hakucho (Kondo et al. 1981) was launched in 1979. Tenma (Tanaka et al. 1984), carrying for the first time the large-area gas scintillation proportional counters (Koyama et al. 1984), was launched four years later (1983). The third X-ray astronomy observatory Ginga (Makino et al. 1987) launched in early 1987 carried a large-area proportional counter array jointly prepared by the Japanese and the U.K. groups (Turner et al. 1989). The fourth X-ray astronomy mission, ASCA, was launched on February 20, 1993. The Japanese characters for ASCA mean a "flying bird" and it is also an achronym of an "advanced satellite for cosmology and astrophysics". ASCA is a high-throughput imaging and spectroscopic X-ray observatory. This series of satellites has nurtured the growth of the Japanese X-ray astronomy considerably and allowed it to capture a leading position in this field. With these satellites, great many observations of virtually all classes of astronomical objects, from nearby stars to most distant galaxies (quasars), have been carried out and various results have been published. Here, we summarize major results we obtained which are considered to be significant contributions to the advancement of research in black hole candidates, active galactic nuclei and cosmic X-ray background.
素粒子論グループ素粒子研究編集部の論文
1994-05-20