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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

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McCarthy, TP ORCID: 0000-0001-9525-7981, Orosz, G ORCID: 0000-0002-5526-990X, Ellingsen, SP ORCID: 0000-0002-1363-5457, Breen, SL, Voronkov, MA, Burns, RA, Olech, M, Yonekura, Y, Hirota, T, Hyland, LJ ORCID: 0000-0002-4783-6679 and Wolak, P 2021 , '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 , doi: 10.48550/arXiv.2110.09669.

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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: 10.48550/arXiv.2110.09669
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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/)

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