期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 351, 期 1, 页码 339-346出版社
BLACKWELL PUBLISHING LTD
DOI: 10.1111/j.1365-2966.2004.07792.x
关键词
galaxies : individual : NGC 2146; galaxies : ISM; galaxies : kinematics and dynamics; galaxies : starburst; radio lines : galaxies
We present 1.4-GHz H I absorption line observations towards the starburst in NGC 2146, made with the Very Large Array and the Multi-Element Radio-Linked Interferometer Network. The H I gas has a rotating disc/ring structure with column densities between 6 and 18 x 10(21) atom cm(-2). The H I absorption has a uniform spatial and velocity distribution, and does not reveal any anomalous material concentration or velocity in the central region of the galaxy which might indicate an encounter with another galaxy or a far-evolved merger. We conclude that the signs of an encounter causing the starburst should be searched for in the outer regions of the galaxy.
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