L1157: Interaction of the molecular outflow with the Class~0 environment

Details L1157: Interaction of the molecular outflow with the Class~0 environment L1157: Interaction of the molecular outflow with the Class~0 environment

2003-12-10

arxiv.org/abs/astro-ph/0312257v1

Astron.Astrophys. 416 (2004) 631-640

Astronomy and Astrophysics

Astrophysics

19 pages, 8 Postscript figures, 1 table; accepted for publication by A&A

Scientific paper

10.1051/0004-6361:20034123

We present high angular resolution interferometric observations of the dust continuum at 2.7 and 1.3 mm, and of the HC3N (12-11) and C18O (2-1) emission around L1157-mm, a Class~0 object that drives a spectacular molecular outflow. The millimeter dust emission is clearly resolved into two components, a flattened compact source of ~450 x 250 AU at 1.3 mm, and mass ~0.1 Msun, plus an extended envelope of ~3000 AU at 1.3 mm, and mass ~1.1 Msun. The millimeter spectral index varies throughout the region, with the lower value found toward the compact protostar, possibly indicating grain growth in the denser regions. A strong interaction between the molecular outflow and the close protostellar environment is taking place and affects the structure of the innermost parts of the envelope. This is shown by the spatial coincidence between the molecular outflow and the dust (1.3 mm continuum) and HC3N emission: both tracers show structures associated to the edges of the outflow lobes. Basically, the global picture sketched for the Class 0 object L1157-mm by Gueth et al. (1997) is supported. We find possible evidence of infall, but we do not detect any velocity gradient indicative of a rotating circumstellar disk.

Affiliated with

Also associated with

No associations

Rating

L1157: Interaction of the molecular outflow with the Class~0 environment 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 L1157: Interaction of the molecular outflow with the Class~0 environment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and L1157: Interaction of the molecular outflow with the Class~0 environment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-460189