The cosmic ray ionization rate in the central parsec of the Galaxy

被引：0
|
作者：
Goto, Miwa [1 ]
机构：
[1] Univ Sternwarte Munchen, Scheinerstr 1, D-81679 Munich, Germany
来源：
GALACTIC CENTER: FEEDING AND FEEDBACK IN A NORMAL GALACTIC NUCLEUS | 2014年 / 9卷 / 303期
关键词：
Galaxy: center; cosmic rays; astrochemistry; ISM: clouds; ISM: lines and bands; ISM: molecules; stars:; individual; (GCIRS; 1W; GCIRS; 3); DENSE MOLECULAR GAS; EMISSION; FRACTION; REGION; H-3(+);
D O I：
10.1017/S1743921314001070
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Cosmic rays represent a unique crossing point of high-energy astrophysics and astrochemistry. The cosmic ray ionization rate of molecular hydrogen (zeta(2)) measured by H-3(+) spectroscopy in the central parsec of the Galaxy is 2 orders of magnitude higher than that in the dense clouds outside the Galactic center. However, it is still too short, by the factor of 10,000, to agree with an extremely high zeta(2) that accommodates the new gamma-ray observations of Sgr A* and its environment.
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页码：429 / 433
页数：5
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