期刊
ASTRONOMY & ASTROPHYSICS
卷 459, 期 2, 页码 441-451出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20053693
关键词
galaxies : general; galaxies : starburst
We present mm-wavelength and optical observations of the starburst region in NGC2146. This region of similar to 4 kpc diameter contains a well-ordered distribution of stars, gas, and dust, and a well-ordered rotation. The possible anomalies found in our observation are a warped CO distribution and an increase in the CO line width at the NW edge of the starburst region. The investigation of a possible encounter or merger origin of the starburst may therefore have to concentrate on the distorted outer structure of the galaxy. There are three large-scale features of similar to 20 kpc extent, two of which give the impression of being stellar sub-systems. The third feature is an incomplete and expanding ring of H II regions and stars, apparently indicating an event that occurred some 300 Myr ago.
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