■トレンド■降落円盤/移流優勢円盤
ADAD=advection dominated accretion disk(降落円盤)
ADAF=advection dominated accretion flow(降落流)
◆基本設定
◆降落円盤が実現する状況
質量 降着率 | >> | =< | << |
---|---|---|---|
輻射圧支持 厚い 不透明 高温 | ガス圧/輻射圧 薄い 不透明 低温 | ガス圧支持 厚い 半透明 超高温 |
|
Classical | radiation torus | standard disk | ion torus |
Fishbone and Moncrief 1976 Kozlowski et al. 1978 Abramowicz et al. 1978 | Lynden-Bell 1969 Shakura and Sunyaev 1973 Novikov and Thorne 1973 Page and Thorne 1974 | Thorne and Price 1975 Eardley et al. 1975 Shapiro et al. 1976 Rees et al. 1982 |
|
Advection | slim disk | inner edge | ADAD |
Abramowicz et al. 1988 Kato et al. 1988 Chen and Taam 1993 Szuszkievicz 1996 | Liang and Thompson 1980 Abramowicz and Zurek 1981 Paczynski and Bisnovatyi-Kogan 1981 Muchotrzeb 1983 Matsumoto et al. 1984 Kato et al. 1988 Chen and Taam 1994 | Narayan and Yi 1994, 1995 Narayan et al. 1996 Abramowicz et al. 1995 Chen et al. 1996 Nakamura et al. 1996 Manmoto 1997 |
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■定常解の構造■steady structure
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■天文学的な応用■LLAGN
ADAD は,その本質からして,高エネルギーの放射をするが,
一方で非常に暗い
→ LLAGN への応用
■研究の現状■progress in ADAD
M = 7*105 Msol
dM/α = 10-5 Msol/yr
M = 3.6*107
dM/α = 10-2 Msol/yr
M = 106 Msol
α < 0.025
Standard Disk | Advection Dominated Disk | |
---|---|---|
structure and stability | ○ | ○ |
spectral properties | ○ | △ |
time variability and oscillation | ○ | − |
relativistic treatment | ○ | − |
magnetic field and radiation field | ○ | − |