The methanol emission in the J1- J0A-+line series as a tracer of specific physical conditions in high-mass star-forming regions
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
The methanol emission in the J1- J0A-+line series as a tracer of specific physical conditions in high-mass star-forming regions
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| Автор |
Salii, S. V.
Zinchenko, I. I. Liu, S. -Y. Sobolev, A. M. Aberfelds, A. Su, Y. -N. |
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| Тематика |
GALAXIES: STAR FORMATION
ISM: INDIVIDUAL OBJECTS: (S255IR, NGC 7538, CEP A) MASERS STARS: MASSIVE SUBMILLIMETRE: ISM GALAXIES GIANT STARS METHANOL GALAXIES: STAR FORMATION HIGH-MASS STARS ISM: INDIVIDUAL OBJECT: (S255IR, NGC 7538, CEP A) ISM: INDIVIDUAL OBJECTS MASER EMISSIONS METHANOL MASERS PHYSICAL CONDITIONS STARS: MASSIVE SUBMILLIMETER: ISM SUBMILLIMETRE MASERS |
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| Описание |
We present results of the investigations of the properties of the methanol J1 -J0 A-+ line series motivated by the recent serendipitous detection of the maser emission in the 141 - 140 A-+ line at 349 GHz in S255IR-SMA1 soon after the accretion burst. The study includes further observations of several lines of this series in S255IR with the SMA, a mini-survey of methanol lines in the 0.8-mm range towards a sample of bright 6.7-GHz methanol maser sources with the IRAM 30-m telescope, and theoretical modelling. We found that the maser component of the 141 - 140 A-+ line in S255IR decayed by more than order of magnitude in comparison with that in 2016. No clear sign of maser emission is observed in other lines of this series in the SMA observations except the 71 - 70 A-+ line where an additional bright component is detected at the velocity of the maser emission observed earlier in the 141 - 140 A-+ line. Our LVG model constrains the ranges of the physical parameters that match the observed emission intensities. No obvious maser emission in the J1 - J0 A-+ lines was detected in the mini-survey of the 6.7-GHz methanol maser sources, though one component in NGC 7538 may represent a weak maser. In general, the maser effect in the J1 - J0 A-+ lines may serve as a tracer of rather hot environments and in particular luminosity flaring events during high-mass star formation. © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
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| Дата |
2024-04-08T11:06:44Z
2024-04-08T11:06:44Z 2022 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) info:eu-repo/semantics/submittedVersion |
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| Идентификатор |
Salii, S, Zinchenko, II, Liu, S-Y, Sobolev, AM, Aberfelds, A & Su, Y-N 2022, 'The methanol emission in the J(1) - J(0) A(-+) line series as a tracer of specific physical conditions in high-mass star-forming regions', Monthly Notices of the Royal Astronomical Society, Том. 512, № 3, стр. 3215-3229. https://doi.org/10.1093/mnras/stac739
Salii, S., Zinchenko, I. I., Liu, S-Y., Sobolev, A. M., Aberfelds, A., & Su, Y-N. (2022). The methanol emission in the J(1) - J(0) A(-+) line series as a tracer of specific physical conditions in high-mass star-forming regions. Monthly Notices of the Royal Astronomical Society, 512(3), 3215-3229. https://doi.org/10.1093/mnras/stac739 0035-8711 Final All Open Access; Green Open Access https://arxiv.org/pdf/2203.09150 https://arxiv.org/pdf/2203.09150 http://elar.urfu.ru/handle/10995/131342 10.1093/mnras/stac739 85144177812 000776762300004 |
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| Язык |
en
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| Права |
Open access (info:eu-repo/semantics/openAccess)
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| Формат |
application/pdf
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| Издатель |
Oxford University Press
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| Источник |
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society |
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