Query : 1997A&A...317L...5L

1997A&A...317L...5L - Astronomy and Astrophysics, volume 317, L5 (1997/1-1)

Spectroscopic evidence of mass infall towards an embedded infrared source in the globule DC 303.8-14.2.


Abstract (from CDS):

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 12CO(J=1-0) transition.

Abstract Copyright:

Journal keyword(s): 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

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
1 Sandqvist 160 DNe 13 06.9 -77 01           ~ 41 0
2 PSCz Q13036-7644 Y*O 13 07 36.89 -77 00 09.7           ~ 39 1
3 LDN 663 DNe 19 36 55 +07 34.4           ~ 599 0

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