Detection of new methanol maser transitions associated with G358.93-0.03

被引：36

作者：

MacLeod, G. C. ^{[1
,2
]}

Sugiyama, K. ^{[3
]}

Hunter, T. R. ^{[4
]}

Quick, J. ^{[2
]}

Baan, W. ^{[5
]}

Breen, S. L. ^{[6
]}

Brogan, C. L. ^{[4
]}

Burns, R. A. ^{[3
,7
]}

Garatti, A. Caratti O. ^{[8
]}

Chen, X. ^{[9
,10
]}

Chibueze, J. O. ^{[11
,12
]}

Houde, M. ^{[1
]}

Kaczmarek, J. F. ^{[13
]}

Linz, H. ^{[14
]}

Rajabi, F. ^{[15
,16
,17
]}

Saito, Y. ^{[18
]}

Schmidl, S. ^{[19
]}

Sobolev, A. M. ^{[20
]}

Stecklum, B. ^{[19
]}

van den Heever, S. P. ^{[2
]}

Yonekura, Y. ^{[18
]}

机构：

[1] Univ Western Ontario, 1151 Richmond St, London, ON N6A 3K7, Canada

[2] Hartebeesthoek Radio Astron Observ, POB 443, ZA-1741 Krugersdorp, South Africa

[3] NAOJ, Mizusawa VLBI Observ, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[4] NRAO, 520 Edgemont Rd, Charlottesville, VA 22903 USA

[5] ASTRON, Netherlands Inst Radio Astron, NL-7991 PD Dwingeloo, Netherlands

[6] Univ Sydney, Sch Phys, Sydney Inst Astron SIfA, Sydney, NSW 2006, Australia

[7] Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea

[8] Dublin Inst Adv Studies, Astron & Astrophys Sect, 31 Fitzwilliam Pl, Dublin D02 XF86 2, Ireland

[9] GuangZhou Univ, Ctr Astrophys, Guangzhou 510006, Guangdong, Peoples R China

[10] Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China

[11] North West Univ, Phys Dept, Space Res Unit, ZA-2520 Potchefstroom, South Africa

[12] Univ Nigeria, Fac Phys Sci, Dept Phys & Astron, Carver Bldg,1 Univ Rd, Nsukka 410001, Nigeria

[13] CSIRO Parkes Observ, CSIRO Astron & Space Sci, POB 276, Parkes, NSW 2870, Australia

[14] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[15] Univ Waterloo, Inst Quantum Comp, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada

[16] Univ Waterloo, Dept Phys & Astron, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada

[17] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada

[18] Ibaraki Univ, Ctr Astron, 2-1-1 Bunkyo, Mito, Ibaraki 3108512, Japan

[19] Thuringer Landessternwarte, Sternwarte 5, D-07778 Tautenburg, Germany

[20] Ural Fed Univ, Inst Nat Sci & Math, Astron Observ, 19 Mira St, Ekaterinburg 620002, Russia

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2019年 / 489卷 / 03期

关键词：

masers; stars: formation; stars: protostars; ISM: individual objects: MMB G358.931-0.030; ISM: molecules; radio lines: ISM; BURST; HYDROXYL; CATALOG;

D O I：

10.1093/mnras/stz2417

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the detection of new 12.178, 12.229, 20.347, and 23.121 GHz methanol masers in the massive star-forming region G358.93-0.03, which are flaring on similarly short time-scales (days) as the 6.668 GHz methanol masers also associated with this source. The brightest 12.178 GHz channel increased by a factor of over 700 in just 50 d. The masers found in the 12.229 and 20.347 GHz methanol transitions are the first ever reported and this is only the fourth object to exhibit associated 23.121 GHz methanol masers. The 12.178 GHz methanol maser emission appears to have a higher flux density than that of the 6.668 GHz emission, which is unusual. No associated near-infrared flare counterpart was found, suggesting that the energy source of the flare is deeply embedded.

引用

页码：3981 / 3989

页数：9

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