Molecular gas in high-mass filament WB673
| Autor: | Svetlana V. Salii, Magnus Thomasson, Maria S. Kirsanova, Henrik Olofsson, Andrej M. Sobolev, Dmitry A. Ladeyschikov |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Astronomy media_common.quotation_subject FOS: Physical sciences QB1-991 Astrophysics 01 natural sciences star formation law.invention bubbles Protein filament Telescope Onsala Space Observatory law massive stars h ɪɪ regions 0103 physical sciences Supersonic waves 010306 general physics 010303 astronomy & astrophysics media_common Star formation Molecular cloud Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies Space and Planetary Science Sky Astrophysics of Galaxies (astro-ph.GA) High mass |
| Zdroj: | Open Astronomy Open Astronomy, Vol 26, Iss 1, Pp 99-105 (2017) |
| DOI: | 10.48550/arxiv.1711.01428 |
| 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 starforming regions. We observed CS (2-1), 13CO (1-0), C18O(1-0), and methanol lines at 96 GHz 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 104 M⊙ and mass-to-length ratio is 360M⊙ pc−1 from 13CO (1-0) data. Mass-to-length ratio for the dense gas is 3.4 − 34M⊙ 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: | OpenAIRE |
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