|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'506'133
Articles rated: 2609
27 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
The formation of the HII regions N83 and N84 in the Small Magellanic Cloud triggered by colliding HI flows | | T. Ohno
; Y. Fukui
; K. Tsuge
; H. Sano
; K. Tachihara
; | | Date: |
3 Jun 2020 | | Abstract: | LHA 115-N 83 (N83) and LHA 115-N 84 (N84) are HII regions associated with the
early stage of star formation located in the Small Magellanic Cloud (SMC). We
have analyzed the new HI data taken with the Galactic Australian Square
Kilometre Array Pathfinder survey project at a high angular resolution of 30".
We found that the two clouds, having ~40 km s$^{-1}$ velocity separation, show
complementary distribution with each other, and part of the HI gas is dispersed
by the ionization. In addition, the Atacama Large Millimeter/submillimeter
Array observations revealed clumpy CO clouds of 10$^{5}$ $M_{odot}$ in total
over an extent of 100 pc, which are also well correlated with the HII regions.
There is a hint of displacement between the two complementary components, which
indicate that the red-shifted HI cloud is moving from the north to the south by
~100 pc. This motion is similar to what is found in NGC 602 (Fukui et al.
2020), suggesting a large scale systematic gas flow. We frame a scenario that
the two components collided with each other and triggered the formation of N83,
N84, and six O-type stars around them in a time scale of a few Myr (~60 pc / 40
km s$^{-1}$). The supersonic motion compressed the HI gas to form the CO clouds
in the red-shifted HI cloud, some of which are forming O-type stars ionizing
the HII regions in the last Myr. The red-shifted HI cloud probably flows to the
direction of the Magellanic Bridge. The velocity field originated by the close
encounter of the SMC with the Large Magellanic Cloud 200 Myr ago as proposed by
Fujimoto & Noguchi (1990). | | Source: | arXiv, 2006.2279 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER