Water maser survey in the Andromeda galaxy

被引：6
作者：
Imai, H [1 ]
Ishihara, Y
Kameya, O
Nakai, N
机构：
[1] Natl Astron Observ, Mizusawa Astrogeodynam Observ, Mizusawa, Iwate 0230861, Japan
[2] Natl Astron Observ, VERA Project Off, Mitaka, Tokyo 1818588, Japan
[3] Univ Tokyo, Dept Astron, Bunkyo Ku, Tokyo 1130033, Japan
[4] Nobeyama Radio Observ, Minamisa Ku, Nagano 3841305, Japan
来源：
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2001年 / 53卷 / 03期
关键词：
galaxies : individual (M 31); masers; stars : formation;
D O I：
10.1093/pasj/53.3.489
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report on a water maser survey in the Andromeda galaxy (M 31). The surveyed H II regions with (CO)-C-12 clouds are expected to be regions of ongoing star formation with water maser activity. Nevertheless, we could not detect any water maser emission with an upper limit of around 0.35 Jy or 4.9 x 10(-3) L-circle dot in isotropic luminosity. These results indicate a low activity of the present star formation in M 31.
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页码：489 / 493
页数：5
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