NUCLEOSYNTHESIS IN A THICK ACCRETION DISK AROUND A 10M. BLACK-HOLE

被引：0
|
作者：
ARAI, K [1 ]
HASHIMOTO, M [1 ]
机构：
[1] KYUSHU UNIV, COLL GEN EDUC, DEPT PHYS, FUKUOKA 810, JAPAN
来源：
ASTRONOMY & ASTROPHYSICS | 1992年 / 254卷 / 1-2期
关键词：
ACCRETION DISKS; NUCLEOSYNTHESIS; STARS; STRUCTURE OF;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Nucleosynthesis in a geometrically thick accretion disk around a 10 M. black hole is calculated with use of a nuclear reaction network which contains the elements up to Ge. The constructed disk model is in hydrostatical equilibrium supported predominantly by radiation pressure and has a stationary flow with a supercritical accretion rate. The alpha-parameter is used in taking into account viscosity inside the disk. When alpha becomes as low as 10(-10) the maximum temperature reaches 4.2 10(9) K in the central region of the disk. A considerable amount of elements up to Fe-56 can be produced deep inside the disk.
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页码：191 / 197
页数：7
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