File(s) not publicly available
High-resolution observations of 6.7-GHz methanol masers with the Long Baseline Array
journal contribution
posted on 2023-05-16, 15:17 authored by Dodson, R, Ojha, R, Simon EllingsenSimon EllingsenWe 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.
History
Publication title
Monthly Notices of the Royal Astronomical SocietyVolume
351Pagination
779-790ISSN
0035-8711Department/School
School of Natural SciencesPublisher
Blackwell Publishing LtdPlace of publication
Oxford, UKRepository Status
- Restricted