Methanol masers and their environment at high resolution

Details Methanol masers and their environment at high resolution Methanol masers and their environment at high resolution

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.300.1131p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 300, Issue 4, pp. 1131-1157.

Astronomy and Astrophysics

Astronomy

100

Masers, Stars: Formation, Hii Regions, Radio Continuum: Ism, Radio Lines: Ism

Scientific paper

We have used the Australia Telescope Compact Array (ATCA) to make high-resolution images of the 6.7-GHz 5_1-->6_0A^+ maser transition of methanol towards 33 sources in the Galactic plane. Including the results from 12 methanol sources in the literature, we find that 17 out of 45 sources have curved or linear morphology. Most of the 17 have a velocity gradient along the line, which is consistent with masers lying in an edge-on circumstellar disc surrounding a massive star. We also made simultaneous continuum observations of the sources at 8.6 GHz, in order to image any associated Hii region. 25 of the sources are associated with an ultracompact Hii region, with a detection limit of ~0.5mJybeam^-1. We argue that the methanol sources without an associated Hii region represent less massive embedded stars, not an earlier stage in the lifetime of the star, as previously suggested.

Affiliated with

Also associated with

No associations

Rating

Methanol masers and their environment at high resolution 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 masers and their environment at high resolution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methanol masers and their environment at high resolution will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-803374