Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...317l...5l&link_type=abstract
Astronomy and Astrophysics, v.317, p.L5-L8
Astronomy and Astrophysics
Astrophysics
16
Line: Profiles, Stars: Formation, Ism: Clouds, Ism: Individual Objects: Dc 303.8-14.2 (Dcld 303.8-14.2), Ism: Individual Objects: Iras 13036-7644, Ism: Jets And Outflows
Scientific paper
We present millimeter molecular line observations towards the embedded infrared source IRAS 13036-7644, located in the globule DC 303.8-14.2. The CS(J=2-1) lines show asymmetrical profiles characteristic of a cloud undergoing gravitational collapse, i.e. double-peaked profiles with a brighter blue-shifted component. In contrast the HCO^+^(J=1-0) line shows towards the IRAS source a double-peaked profile with a brighter red-shifted component, and a velocity gradient across the cloud. The hyperfine components of HCN(J=1-0) transition show both kinds of double-peaked profiles, and a velocity gradient. We interpret these results as a simultaneous infall of the dense gas in the core and a non-collapsing envelope. The IRAS source drives a bipolar molecular outflow detected in the ^12^CO(J=1-0) transition.
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