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 104 M⊙ and mass-to-length ratio is 360 M⊙pc−1 from 13CO(1-0) data. Mass-to-length ratio for the dense gas is 3.4−34 M⊙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.
@article{arxiv.1711.01428,
title = {Molecular gas in high-mass filament WB673},
author = {M. S. Kirsanova and S. V. Salii and A. M. Sobolev and A. O. H. Olofsson and D. A. Ladeyschikov and M. Thomasson},
journal= {arXiv preprint arXiv:1711.01428},
year = {2017}
}