Two periods instead of one in a single 6.7 GHz methanol maser feature in G9.62+0.20E

doi:10.1093/mnrasl/slac083

	Two periods instead of one in a single 6.7 GHz methanol maser feature in G9.62+0.20E
	MacLeod, G. C.1,2; Yonekura, Y.3; Tanabe, Y.3; Baan, W. A.4,5 ; Brogan, C. L.6; Burns, R. A.7; Chibueze, J. O.8,9; Houde, M.10; Hunter, T. R.6; Kurtz, S. E.11; Rajabi, F.12; Smits, D. P.13; Stecklum, B.14; Sugiyama, K.15
	2022-10-01
Source Publication	Monthly Notices of the Royal Astronomical Society
ISSN	0035-8711
Volume	516 Issue:1 Pages:L96-L100
Contribution Rank	4
Abstract	The source G9.62+0.20E surprises yet again! Analysis of the associated methanol maser feature at v lsr = +8.8 km s(-1) revealed a second period of P = 52.1 +/- 0.3 d, along with the previously reported period P = 243 d for this source. Various explanations, harmonic flaring, Dicke's superradiance, a secondary pulsation, or two different periodically varying radio sources in the field of view with associated methanol masers are presented. The latter two hypotheses appear more plausible but it is not clear which, if any, best describe these observations.
Keyword	masers stars: formation stars: protostars ISM: individual objects: G9.62+0.20E ISM: molecules radio lines: ISM h ii regions variability environment pulsation discovery Astronomy & Astrophysics
Subtype	Article
DOI	10.1093/mnrasl/slac083
Indexed By	SCI
Language	英语
WOS ID	WOS:000934001900018
Citation statistics	Cited Times:3[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.xao.ac.cn/handle/45760611-7/5141
Collection	射电天文研究室_恒星形成与演化研究团组
Affiliation	1.Department of Physical Sciences, The Open University of Tanzania, P.O. Box 23409, Dar-Es-Salaam, Tanzania; 2.Hartebeesthoek Radio Astronomy Observatory, PO Box 443, Krug er sdorp 741, South Africa; 3.Center for Astronomy, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan; 4.Xinjiang Astronomical Observatory, 150 Science 1-Street, Urumqi, Xinjiang 830011, P.R. China; 5.Netherlands Institute for Radio Astronomy, ASTRON, 7991 PD, Dwingeloo, The Netherlands; 6.NRAO, 520 Edgemont Rd, Charlottesville, VA 22903, USA; 7.Mizusawa VLBI Observatory, National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; 8.Centre for Space Research, North-West University, Potchefstroom 2520, South Africa; 9.Department of Physics and Astronomy, Faculty of Physical Sciences, University of Nigeria, Carver Building, 1 University Road, Nsukka 410001 Nigeria; 10.Department of Physics and Astronomy, The University of Western Ontario, 1151 Richmond Street London ON N6A 3K7, Canada; 11.Institute of Radioastronomy and Astrophysics, National Autonomous University of Mexico, Antigua Carretera a Patzcuaro 8701, Morelia, 58089 Michoacan, Mexico; 12.Perimeter institute for theoretical physics, Waterloo ON N2L 2Y5, Canada; 13.Dept of Mathematical Sciences, University of South Africa, Private Bag X6, Florida 1709, South Africa; 14.Thuringer Landessternwarte, Sternwarte 5, 07778 Tautenburg, Germany; 15.National Astronomical Research Institute of Thailand (Public Organization), 260 Moo 4, T. Donkaew, A. Maerim, Chiangmai 50180, Thailand
Recommended Citation GB/T 7714	MacLeod, G. C.,Yonekura, Y.,Tanabe, Y.,et al. Two periods instead of one in a single 6.7 GHz methanol maser feature in G9.62+0.20E[J]. Monthly Notices of the Royal Astronomical Society,2022,516(1):L96-L100.
APA	MacLeod, G. C..,Yonekura, Y..,Tanabe, Y..,Baan, W. A..,Brogan, C. L..,...&Sugiyama, K..(2022).Two periods instead of one in a single 6.7 GHz methanol maser feature in G9.62+0.20E.Monthly Notices of the Royal Astronomical Society,516(1),L96-L100.
MLA	MacLeod, G. C.,et al."Two periods instead of one in a single 6.7 GHz methanol maser feature in G9.62+0.20E".Monthly Notices of the Royal Astronomical Society 516.1(2022):L96-L100.

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