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Abstract

We present high spatial resolution observations of ground-state OH masers achieved with the Australia Telescope Compact Array (ATCA). These observations targeted 253 pointing centers containing OH maser candidates at all four ground-state OH transitions identified in the Southern Parkes Large-Area Survey in Hydroxyl (SPLASH) across 96 deg2 of the southern Galactic plane (332° l b l b l b l b 2) and find that the detection rate of 1.7 GHz radio continuum sources (18%) is lower than that previously found at 8.2 and 9.2 GHz (38%). We also find that the velocity separations of evolved star sites with symmetric 1612 MHz maser profiles are generally smaller than those with asymmetric profiles.

Item Type:	Article
Authors/Creators:	Qiao, H-H and Breen, SL and Gomez, JF and Dawson, JR and Walsh, AJ and Green, JA and Ellingsen, SP and Imai, H and Shen, Z-Q
Keywords:	catalogs, interstellar molecules, circumstellar masers, interstellar masers, star formation, asymptotic giant branch stars, post-asymptotic giant branch
Journal or Publication Title:	The Astrophysical Journal Supplement Series
Publisher:	Univ Chicago Press
ISSN:	0067-0049
DOI / ID Number:	https://doi.org/10.3847/1538-4365/ab655d
Copyright Information:	Copyright 2020 The American Astronomical Society
Related URLs:	Google Scholar: Ellingsen, SP UTAS Profile: Ellingsen, SP
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