| Autor: |
Kirsanova, M. S., Salii, S. V., Sobolev, A. M., Olofsson, A. O. H., Ladeyschikov, D. A., Thomasson, M. |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
Open Astronomy. 26(1): 99-105 (2017). Retrieved 21 Dec. 2017 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1515/astro-2017-0020 |
| Popis: |
We studied the distribution of dense gas in a filamentary molecular cloud containing several dense clumps. The center of the filament is given by the dense clump WB673. The clumps are high-mass and intermediate-mass star-forming regions. We observed CS(2-1), 13CO(1-0), C18O(1-0) and methanol lines at 96GHz toward WB673 with the Onsala Space Observatory 20-m telescope. We found CS(2-1) emission in the inter-clump medium so the clumps are physically connected and the whole cloud is indeed a filament. Its total mass is $10^4$ M$_{\odot}$ and mass-to-length ratio is 360 M$_{\odot}$pc$^{-1}$ from 13CO(1-0) data. Mass-to-length ratio for the dense gas is $3.4-34$ M$_{\odot}$pc$^{-1}$ from CS(2-1) data. The PV-diagram of the filament is V-shaped. We estimated physical conditions in the molecular gas using methanol lines. Location of the filament on the sky between extended shells suggests that it could be a good example to test theoretical models of formation of the filaments via multiple compression of interstellar gas by supersonic waves. |
| Databáze: |
arXiv |
| Externí odkaz: |
|
