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Astronomy and AstrophysicsVolume 606, 1 October 2017, Article number L6

Detection of a new methanol maser line with ALMA(Article)(Open Access)

  • Zinchenko, I.,
  • Liu, S.-Y.,
  • Su, Y.-N.,
  • Sobolev, A.M.
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  • aInstitute of Applied Physics, Russian Academy of Sciences, 46 Uljanov str., Nizhny Novgorod, 603950, Russian Federation
  • bInstitute of Astronomy and Astrophysics, Academia Sinica, PO Box 23-141, Taipei, 10617, Taiwan
  • cUral Federal University, 19 Mira street, Ekaterinburg, 620002, Russian Federation

Abstract

Aims. We investigated the structure and kinematics of the gaseous disk and outflows around the massive young stellar object S255 NIRS3 in the S255IR-SMA1 dense clump. Methods. Observations of the S255IR region were carried out with ALMA at two epochs in the compact and extended configurations. Results. We serendipitously detected a new, never predicted, bright maser line at about 349.1 GHz, which most probably represents the CH3OH 141-140 A-+ transition. The emission covers most of the 6.7 GHz methanol maser emission area of almost 1″ and shows a velocity gradient in the same sense as the disk rotation. No variability was found in the time interval of several months. The emission is classified as Class II maser and probably originates in a ring at a distance of several hundred AU from the central star. © ESO, 2017.

Author keywords

ISM: individual objects: S255IRISM: moleculesMasers

Indexed keywords

Engineering controlled terms:Methanol
Engineering uncontrolled termsClass IIDisk rotationISM: individual objectsISM: moleculesMethanol masersTime intervalVelocity gradientsYoung stellar objects
Engineering main heading:Masers

Funding details

Funding sponsor Funding number Acronym
Russian Science Foundation17-12-01256RSF

  • 1

    Acknowledgements. We are grateful to the anonymous referee for the helpful comments. I.Z. was supported by the Russian Science Foundation (project No. 17-12-01256). This paper makes use of the following ALMA data: ADS/JAO.ALMA#2015.1.00500.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in co-operation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ.

  • ISSN: 00046361
  • CODEN: AAEJA
  • Source Type: Journal
  • Original language: English
  • DOI: 10.1051/0004-6361/201731752
  • Document Type: Article
  • Publisher: EDP Sciences


© Copyright 2017 Elsevier B.V., All rights reserved.

Cited by 16 documents

Baek, G. , Lee, J.-E. , Evans, N.J.
Spectral Survey of a Hot Core with an Eruptive Accretion in S255IR NIRS3 (SHEA): The Discovery of Class I and II Millimeter Methanol Maser Transitions
(2023) Astrophysical Journal Letters
Zinchenko, I.I.
Observational studies of high-mass star formation
(2023) Astronomical and Astrophysical Transactions
Humire, P.K. , Henkel, C. , Hernández-Gómez, A.
Methanol masers in NGC 253 with ALCHEMI
(2022) Astronomy and Astrophysics
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