Radiation spectra from advection-dominated accretion flows in a global magnetic field

被引：11
|
作者：
Kino, M [1 ]
Kaburaki, O
Yamazaki, N
机构：
[1] Tohoku Univ, Grad Sch Sci, Astron Inst, Aoba Ku, Sendai, Miyagi 9808578, Japan
[2] Osaka Univ, Grad Sch Sci, Dept Earth & Space Sci, Toyonaka, Osaka 5600043, Japan
来源：
ASTROPHYSICAL JOURNAL | 2000年 / 536卷 / 02期
关键词：
accretion; accretion disks; Galaxy : center; magnetic fields; radiation mechanisms : thermal;
D O I：
10.1086/308962
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We calculate the radiation spectra from advection-dominated accretion flows (ADAFs), taking into account the effects of a global magnetic field. Our calculation is based on the analytic model for magnetized ADAFs proposed by Kaburaki, in which a large-scale magnetic field controls the accretion process, Adjusting a few parameters, we find that our model can well reproduce the observed spectrum of Sagittarius A*. The result is discussed in comparison with those of well-known ADAF models, in which the turbulent viscosity controls the accretion process.
引用
收藏
页码：788 / 797
页数：10
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