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A sensitive search for predicted methanol maser transitions with the Australia Telescope Compact Array

journal contribution
posted on 2023-05-18, 23:37 authored by Chipman, A, Simon EllingsenSimon Ellingsen, Sobolev, AM, Cragg, DM
We have used the Australia Telescope Compact Array to search for a number of centimetre wavelength methanol transitions which are predicted to show weak maser emission towards star formation regions. Sensitive, high spatial, and spectral resolution observations towards four high-mass star formation regions which show emission in a large number of class II methanol maser transitions did not result in any detections. From these observations, we are able to place an upper limit of ≲ 1300 K on the brightness temperature of any emission from the 31A+–31A-, 17-2–18-3 E (vt = 1), 124–133 A-, 124–133 A+, and 41A+–41A- transitions of methanol in these sources on angular scales of 2 arcsec. This upper limit is consistent with current models for class II methanol masers in high-mass star formation regions and better constraints than those provided here will likely require observations with next-generation radio telescopes.

History

Publication title

Publications of the Astronomical Society of Australia

Volume

33

Article number

e056

Number

e056

Pagination

1-5

ISSN

1448-6083

Department/School

School of Natural Sciences

Publisher

Cambridge University Press

Place of publication

UK

Rights statement

© Astronomical Society of Australia 2016

Repository Status

  • Restricted

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