File(s) not publicly available
A comprehensive search for extragalactic 6.7-GHz methanol masers
journal contribution
posted on 2023-05-16, 11:07 authored by Phillips, CJ, Norris, RP, Simon EllingsenSimon Ellingsen, Rayner, DPWe have used the Australia Telescope Compact Array (ATCA) to search for 6.7-GHz methanol maser emission towards 87 galaxies. We chose the target sources using several criteria, including far-IR luminosities and the presence of known OH megamasers. In addition, we searched for methanol masers in the nearby starburst galaxy NGC 253, making a full spectral-line synthesis image. No emission was detected in any of the galaxies, with detection limits ranging from 25 to 75 mJy. This is surprising, given the close association of OH and methanol masers in Galactic star formation regions, and significantly constrains models of OH megamaser emission. This absence of maser emission may be a result of low methanol abundances in molecular clouds in starburst galaxies.
History
Publication title
Monthly Notices of the Royal Astronomical SocietyVolume
294Pagination
265-271ISSN
0035-8711Department/School
School of Natural SciencesPublisher
Royal Astronomical SocietyPlace of publication
LondonRepository Status
- Restricted