Extragalactic Sub-millimeter H2O Maser-Detection of a 321 GHz Water Maser in Circinus Galaxy

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|
作者：
Hagiwara, Yoshiaki [1 ]
Horiuchi, Shinji [2 ]
Doi, Akihiro [3 ]
Miyoshi, Makoto [1 ]
机构：
[1] Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
[2] CSIRO Astron & Space Sci, Tuggeranong, ACT 2901, Australia
[3] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuou Ku, Sagamihara, Kanagawa 2525210, Japan
来源：
REVOLUTION IN ASTRONOMY WITH ALMA: THE THIRD YEAR | 2015年 / 499卷
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the first detection of the extragalactic 321 GHz H2O emission towards the Circinus Galaxy, the nearby Type2 Seyfert galaxy. It is likely that the detected emission is a maser because of the narrow line shape, the compact emission (<0.66 '') and the high energy level of the transition. High velocity emission, red-shifted up to 635 km/s, was tentatively detected. The maser location of about 0.02 pc from the center of the galaxy is estimated by adopting the Kepler rotating disk model. This could be the molecular material observed closest to the central engine.
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页码：131 / 132
页数：2
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