A Search for Extragalactic Methanol Masers
Abstract
A sensitive search for 6.7--GHz methanol maser emission has been made towards 10 galaxies that have yielded detectable microwave molecular--line transitions. These include several which show OH megamaser or superluminous \water\/ maser emission. Within the Galaxy, \methanol\/ and OH masers often occur in the same star formation regions and, in most cases, the \methanol\/ masers have a greater peak flux density than their OH counterparts. Thus we might expect \methanol\/ masers to be associated with extragalactic OH maser sources. We failed to detect any emission or absorption above our 60--mJy detection limit. We conclude that if the physical conditions exist to produce \methanol\/ megamaser emission, they are incompatible with the conditions which produce OH megamaser emission.
Keywords
Cite
@article{arxiv.astro-ph/9403059,
title = {A Search for Extragalactic Methanol Masers},
author = {S. P. Ellingsen and R. P. Norris and J. B. Whiteoak and R. A. Vaile and P. M. McCulloch and M. Price},
journal= {arXiv preprint arXiv:astro-ph/9403059},
year = {2015}
}
Comments
9 Pages, LaTeX