eCite Digital Repository

High-resolution observations of 6.7-GHz methanol masers with the Long Baseline Array

Citation

Dodson, R and Ojha, R and Ellingsen, SP, High-resolution observations of 6.7-GHz methanol masers with the Long Baseline Array, Monthly Notices of the Royal Astronomical Society, 351, (3) pp. 779-790. ISSN 0035-8711 (2004) [Refereed Article]

DOI: doi:10.1111/j.1365-2966.2004.07844.x

Abstract

We have used the Australian Long Baseline Array (LBA) to produce milliarcsecond images of five sites of methanol (CH3OH) maser emission at 6.7 GHz. These are all sites that have linear morphologies at arcsecond resolutions, which have been hypothesized to be due to the masers forming in edge-on circumstellar discs. We find that a simple disc model cannot explain the observations. We discuss various alternatives, and suggest a new model that explains how linear velocity gradients can be produced in methanol masers that arise in planar shocks propagating nearly perpendicular to the line of sight.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical and Space Sciences
Research Field:Galactic Astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Physical Sciences
Author:Dodson, R (Mr Richard Dodson)
Author:Ellingsen, SP (Professor Simon Ellingsen)
ID Code:30736
Year Published:2004
Web of Science® Times Cited:35
Deposited By:Physics
Deposited On:2004-08-01
Last Modified:2005-04-15
Downloads:0

Repository Staff Only: item control page