Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-02-24
Astron.Astrophys. 419 (2004) 599-605
Astronomy and Astrophysics
Astrophysics
Accepted by A&A, 7 pages, Fig 1 is low-res compressed postscript, please contact lead author for high-res version
Scientific paper
10.1051/0004-6361:20035821
We report the results of a search for the double-peaked blue-skewed infall signature in the bright-rimmed cloud core SFO 11NE SMM1. Observations of the optically thick HCO$^{+}$ and optically thin H$^{13}$CO$^{+}$ J=3--2 lines reveal that there is indeed a characteristic double-peaked line profile, but skewed to the red rather than the blue. Modelling of the dust continuum emission and line profiles show that the motions within SFO 11NE SMM1 are consistent with a collapsing central core surrounded by an expanding outer envelope. We show that the collapse is occurring at a similar rate to that expected onto a single solar-mass protostar and is unlikely to represent the large-scale collapse of gas onto the infrared cluster seen at the heart of SFO 11NE SMM1. The outer envelope is expanding at a much greater rate than that expected for a photoevaporated flow from the cloud surface. The modelled expansion is consistent with the bulk cloud re-expansion phase predicted by radiative-driven implosion models of cometary clouds.
Thompson Maggie A.
White Glen J.
No associations
LandOfFree
Collapse and expansion in the bright-rimmed cloud SFO 11NE does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Collapse and expansion in the bright-rimmed cloud SFO 11NE, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Collapse and expansion in the bright-rimmed cloud SFO 11NE will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-351817