DISCOVERY OF 6.035 GHz HYDROXYL MASER FLARES IN IRAS 18566+0408

被引：8

作者：

Al-Marzouk, A. A. ^{[1
]}

Araya, E. D. ^{[1
]}

Hofner, P. ^{[2
,3
]}

Kurtz, S. ^{[4
]}

Linz, H. ^{[5
]}

Olmi, L. ^{[6
,7
]}

机构：

[1] Western Illinois Univ, Dept Phys, Macomb, IL 61455 USA

[2] New Mexico Inst Min & Technol, Dept Phys, Socorro, NM 87801 USA

[3] Natl Radio Astron Observ, Socorro, NM 87801 USA

[4] Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58090, Michoacan, Mexico

[5] Max Planck Inst Astron, D-69117 Heidelberg, Germany

[6] Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy

[7] Univ Puerto Rico Rio Piedras, Dept Phys, Rio Piedras, PR 00931 USA

来源：

ASTROPHYSICAL JOURNAL | 2012年 / 750卷 / 02期

基金：

美国国家科学基金会;

关键词：

H II regions; ISM: individual objects (IRAS18566+0408); ISM: molecules; masers; radio lines: ISM; stars: formation; STAR-FORMING-REGIONS; II METHANOL MASERS; OH MASERS; SUPERNOVA-REMNANTS; MAGNETIC-FIELD; EMISSION; LINE; G9.62+0.20E; VARIABILITY; RADIATION;

D O I：

10.1088/0004-637X/750/2/170

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery of 6.035 GHz hydroxyl (OH) maser flares toward the massive star-forming region IRAS 18566+0408 (G37.55+0.20), which is the only region known to show periodic formaldehyde (4.8 GHz H2CO) and methanol (6.7 GHz CH3OH) maser flares. The observations were conducted between 2008 October and 2010 January with the 305 m Arecibo Telescope in Puerto Rico. We detected two flare events, one in 2009 March and one in 2009 September to November. The OH maser flares are not simultaneous with the H2CO flares, but may be correlated with CH3OH flares from a component at corresponding velocities. A possible correlated variability of OH and CH3OH masers in IRAS 18566+0408 is consistent with a common excitation mechanism (IR pumping) as predicted by theory.

引用

页数：6

共 10 条

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