Structure and kinematics of a protostar: mm-interferometry of L 1157.

Details Structure and kinematics of a protostar: mm-interferometry of L 1157. Structure and kinematics of a protostar: mm-interferometry of L 1157.

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...323..943g&link_type=abstract

Astronomy and Astrophysics, v.323, p.943-952

Astronomy and Astrophysics

Astrophysics

54

Stars: Formation, Ism: Individual Objects: L 1157, Ism: Jets And Outflows, Ism: Molecules, Radio Lines: Ism

Scientific paper

We present high angular resolution (2.5") interferometric images of ^13^CO J=1->0 , C^18^ O J=1->0 , and λ2.7mm continuum emission around L 1157-mm, a suspected protostar powering an energetic molecular outflow. The continuum emission consists in two distinct components. The Class 0 object L1157-mm is seen as a compact source of size <=1" (440AU) and mass =~0.2Msun_, which is marginally resolved and elongated perpendicular to the outflow axis. In addition, spatially-extended low-level emission is observed and likely arises at the heated edges of the cavity excavated by the outflow in the surrounding envelope. Simple modelisation shows that such an interacting structure can explain the observed morphology and the spectral energy distribution of the source. The line observations indicate that ^13^CO mostly originates from the envelope and the limb-brightened edges of the outflow, whereas the C^18^O emission is more directly associated with the compact continuum source. Weak evidence for rotation has been found. Comparison of the two line tracers shows prominent redshifted self-absorption in the ^13^CO spectrum which is very suggestive of infall motions. The infalling medium seems to be confined in a large (a few thousands AU) flattened structure. These observations provide a quite detailed description of the structure of a Class 0 protostar, which appears to have a complex vicinity where the outflowing and accreting phenomena are closely linked together.

Affiliated with

Also associated with

No associations

Rating

Structure and kinematics of a protostar: mm-interferometry of L 1157. 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 Structure and kinematics of a protostar: mm-interferometry of L 1157., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structure and kinematics of a protostar: mm-interferometry of L 1157. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1183946