Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011apj...738..152s&link_type=abstract
The Astrophysical Journal, Volume 738, Issue 2, article id. 152 (2011).
Astronomy and Astrophysics
Astronomy
Ism: Clouds, Ism: Molecules, Ism: Structure, Radio Lines: Ism, Stars: Formation, Stars: Protostars
Scientific paper
We present high spectral resolution millimeter mapped observations of seven prestellar cores in the Coalsack, including imaging in five optically thin molecular species of the kinematic structure of two of the densest cores, C2 and C4. Various collapse-critical indices are calculated; critical masses needed for collapse are consistently greater than those observed, the latter ranging from 0.4 to 2.4 M sun. The molecular emission in several of the cores shows line profiles with infall characteristics as well as elongated areas of increased line widths and reversals of center velocity gradients, implying that accretion disks may be forming.
Butner Harold M.
Cunningham Maria
Rathborne Jill
Saul Martin
Walsh Wilfred
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