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Abstract

We have performed a molecular line search toward the flaring 6.7-GHz masers G24.33+0.13 and G359.62-0.24 using the Australia Telescope Compact Array. We present spectra of the 6.7-GHz class~II methanol and 22.2-GHz water masers toward these sources and provide comparison with other recent flaring events these sources have experienced. We also detect the fourth example of a 23.4-GHz class~I methanol maser, and the eleventh example of a 4.8-GHz formaldehyde maser toward G24.33+0.13. Alongside these results, we observe the previously detected ammonia (3,3) emission and report upper limits on the presence of various other cm-wavelength methanol, ammonia and OH transitions. Our results are consistent with the flaring of G24.33+0.13 being driven by a variable accretion rate in the host high-mass young stellar object.

Item Type:	Article
Authors/Creators:	McCarthy, TP and Orosz, G and Ellingsen, SP and Breen, SL and Voronkov, MA and Burns, RA and Olech, M and Yonekura, Y and Hirota, T and Hyland, LJ and Wolak, P
Keywords:	maser flare, star-formation, masers
Journal or Publication Title:	MNRAS
DOI / ID Number:	https://doi.org/10.48550/arXiv.2110.09669
Copyright Information:	Copyright the authors. Released under a Creative Commons Attribution 4.0 International (CC BY 4.0) license (https://creativecommons.org/licenses/by/4.0/)
Related URLs:	Google Scholar: Ellingsen, SP UTAS Profile: Ellingsen, SP
Item Statistics:	View statistics for this item

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