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Molecular environs and triggered star formation around the large Galactic infrared bubble N 24
2019-06-28| 【A A A【Print】【Close】
As a result of the feedback from massive stars, the infrared dust bubble is an important stage of star formation and evolution. A large bubble with a long enough time to sweep up surrounding material would make it easier to find evidence of a triggered formation of new-generation stars.

By using the NH3(1,1) and (2,2) data observed from the NanShan 26-m Radio Telescope (NSRT), and combined with infrared and GRS13CO(1-0) data, various studies on the investigation of dust emission and gas emission properties in this region as well as the surrounding young stars have been carried out by a postgraduate Li Xu at XAO, under the guidance of Dr. Esimbek Jarken. The studies show that the twenty-three dense clumps are identified in the shell of N24, all of which meet the conditions for the formation of massive stars. The SED fitting results of the 11 identified YSOs indicate that 9 of these have a mass above 8 M. The analysis suggests that the collect-and-collapse mechanism is in play at the boundary of the bubble, but the radiation-driven implosion mechanism may also play a significant role there. This work has been published in the Monthly Notices of the Royal Astronomical Society (MNRAS, 2019, 487, 1517-1528)


The distribution of ammonia molecules (black contours) and the 13 CO emissions (colour bars)

Link to the research paper:


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