2004A&A...426..941B -
Astronomy and Astrophysics, volume 426, 941-949 (2004/11-2)
The dense molecular cores in the IRAS 21391+5802 region.
BELTRAN M.T., GIRART J.M., ESTALELLA R. and HO P.T.P.
Abstract (from CDS):
We present a detailed kinematical study and modeling of the emission of the molecular cores at ambient velocities surrounding IRAS 21391+5802, an intermediate-mass protostar embedded in IC 1396N. The high-density gas emission is found in association with three dense cores associated with the YSOs BIMA 1, BIMA 2, and BIMA 3. The CS (J=5->4) and CH3OH (J=5–1->4–1) emission around BIMA 1 has been modeled by considering a spatially infinitely thin ring seen edge-on by the observer. From the model we find that CS is detected over a wider radii range than CH3OH. A bipolar outflow is detected in the CS (J=2->1) line centered near BIMA 1. This outflow could be powered by a yet undetected YSO, BIMA 1W, or alternatively could be part of the BIMA 1 molecular outflow. The CS and CH3OH emission associated with the intermediate-mass protostar BIMA 2 is highly perturbed by the bipolar outflow even at cloud velocities, confirming that the protostar is in a very active stage of mass loss. For YSO BIMA 3 the lack of outflow and of clear evidence of infall suggests that both outflow and infall are weaker than in BIMA 1, and that BIMA 3 is probably a more evolved object.
Abstract Copyright:
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Journal keyword(s):
ISM: individual objects: IC 1396N - ISM: individual objects: IRAS 21391+5802 - ISM: jets and outflows - ISM: molecules - radio lines: ISM - stars: formation
Nomenclature:
Text: [BGE2002] BIMA 1W added.
Simbad objects:
9
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