Methanol in protostellar outflows. Single-dish and interferometric maps of NGC 1333/IRAS 2

Details Methanol in protostellar outflows. Single-dish and interferometric maps of NGC 1333/IRAS 2 Methanol in protostellar outflows. Single-dish and interferometric maps of NGC 1333/IRAS 2

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...335..266b&link_type=abstract

Astronomy and Astrophysics, v.335, p.266-276 (1998)

Astronomy and Astrophysics

Astrophysics

41

Stars: Formation, Ism: Jets And Outflows, Ism: Individual Objects: Ngc 1333/Iras 2, Ism: Molecules, Ism: Abundances, Radio Lines: Ism

Scientific paper

We report high-resolution mapping observations of the 2_k-1_k, 3_k-2_k, and 5_k-4_k thermal lines of CH_3OH toward the young bipolar outflow driven by the Class 0 object NGC 1333/IRAS 2. Only weak emission has been detected towards the position of the central object, while strong methanol lines have been observed towards the endpoints of the outflow lobes, where the {CH_3OH} abundance is enhanced by a factor ~ 300. The methanol emission is confined in two jets, with a collimation factor of about 20: redshifted emission comes from the south-east lobe, while blueshifted lines are detected towards the north-west. Statistical equilibrium calculations have been used to fit the relative intensities of the observed transitions. These lead us to the conclusion that the ambient gas surrounding the protostar has a density similar to that of the high velocity gas in the shocked regions ( ~ 10(6) cm(-3) ). Interferometric maps with a resolution of 3arcsec show that the blueshifted lobe consists of several ``bullets'' indicating that episodic mass loss has occurred. The age estimate is =~ 2-5 10(3) yr. The high-velocity redshifted emission comes from a structure which becomes ``V-like'' at velocities close to that of the ambient gas. These results fit nicely with recent magnetohydrodynamical models where a working surface with a cone-like shape creates elongated naked jets containing bullets in their interior.

Affiliated with

Also associated with

No associations

Rating

Methanol in protostellar outflows. Single-dish and interferometric maps of NGC 1333/IRAS 2 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 Methanol in protostellar outflows. Single-dish and interferometric maps of NGC 1333/IRAS 2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methanol in protostellar outflows. Single-dish and interferometric maps of NGC 1333/IRAS 2 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1340538