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Molecular line search toward the flaring 6.7-GHz methanol masers of G24.33+0.13 and G359.620.24: rare maser transitions detected

Citation

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, Molecular line search toward the flaring 6.7-GHz methanol masers of G24.33+0.13 and G359.62-0.24: rare maser transitions detected, MNRAS pp. 1-15. (2021) [Refereed Article]


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Copyright the authors. Released under a Creative Commons Attribution 4.0 International (CC BY 4.0) license (https://creativecommons.org/licenses/by/4.0/)

DOI: doi:10.48550/arXiv.2110.09669

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 Details

Item Type:Refereed Article
Keywords:maser flare, star-formation, masers
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:McCarthy, TP (Dr Tiege McCarthy)
UTAS Author:Orosz, G (Mr Gabor Orosz)
UTAS Author:Ellingsen, SP (Professor Simon Ellingsen)
UTAS Author:Hyland, LJ (Mr Lucas Hyland)
ID Code:147952
Year Published:2021
Deposited By:Physics
Deposited On:2021-11-25
Last Modified:2022-05-26
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