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Related papers: Class I methanol masers: Masers with EGOs

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We report the results of a systematic survey for 95 GHz class I methanol masers towards a new sample of 192 massive young stellar object (MYSO) candidates associated with ongoing outflows (known as extended green objects or EGOs) identified…

Solar and Stellar Astrophysics · Physics 2015-05-28 Xi Chen , Simon P. Ellingsen , Zhi-Qiang Shen , Anita Titmarsh , Cong-Gui Gan

We present the results of a high angular resolution Very Large Array (VLA) Class I 44 GHz and Class II 6.7 GHz methanol maser survey of a sample of ~20 massive young stellar object (MYSO) outflow candidates selected on the basis of extended…

Solar and Stellar Astrophysics · Physics 2009-09-28 C. J. Cyganowski , C. L. Brogan , T. R. Hunter , E. Churchwell

We present high angular resolution Submillimeter Array (SMA) and Karl G. Jansky Very Large Array (VLA) observations of the massive protocluster G18.67+0.03. Previously targeted in maser surveys of GLIMPSE Extended Green Objects (EGOs), this…

Astrophysics of Galaxies · Physics 2015-06-11 C. J. Cyganowski , C. L. Brogan , T. R. Hunter , Q. Zhang , R. K. Friesen , R. Indebetouw , C. J. Chandler

The revised version of the class I methanol maser catalog is presented. It contains 198 sources - new class I methanol masers detected in the direction of EGOs were added to the previous number (~160 sources have been published in the first…

Astrophysics of Galaxies · Physics 2010-06-18 I. E. Val'tts , G. M. Larionov , O. S. Bayandina

As the recent publication by Breen et al (2013) found Class II methanol masers are exclusively associated with high mass star forming regions. Based on the positions of the Class I and II methanol and H$_{2}$O masers, UC H II regions and…

Astrophysics of Galaxies · Physics 2014-11-19 Hontas Farmer

We have observed a sample of 288 molecular outflow sources including 123 high-mass and 165 low-mass sources to search for class I methanol masers at 95 GHz transition and to investigate relationship between outflow characteristics and class…

Solar and Stellar Astrophysics · Physics 2015-06-12 Cong-Gui Gan , Xi Chen , Zhi-Qiang Shen , Ye Xu , Bing-Gang Ju

We have selected the positions of 54 6.7GHz methanol masers from the Methanol Multibeam Survey catalogue, covering a range of longitudes between $20^{\circ}$ and $34^{\circ}$ of the Galactic Plane. These positions were mapped in the J=3-2…

We present an interferometric survey of the 44 GHz class I methanol maser transition toward a sample of 69 sources consisting of High Mass Protostellar Object candidates and Ultracompact (UC) H II regions. We found a 38% detection rate (16…

Astrophysics of Galaxies · Physics 2016-02-17 A. I. Gómez-Ruiz , S. E. Kurtz , E. D. Araya , P. Hofner , L. Loinard

We present the results of deep, high angular resolution Very Large Array (VLA) surveys for radio continuum emission towards a sample of 14 GLIMPSE Extended Green Objects (EGOs). Identified as massive young stellar object (MYSO) outflow…

Solar and Stellar Astrophysics · Physics 2015-05-30 C. J. Cyganowski , C. L. Brogan , T. R. Hunter , E. Churchwell

We discuss 94 Extended Green Objects (EGOs) in the northern Galactic plane cataloged by Cyganowski et al, based on near-infrared narrowband H2 (2.122 {\mu}m and continuum observations from the United Kingdom Infrared Telescope. This data…

We present a study of molecular outflows using high-resolution mapping of the CO (1-0) line emission toward eight relatively nearby 6.7 GHz methanol masers, which are associated with massive star forming regions. Outflows were detected in…

Astrophysics · Physics 2008-11-26 Y. Xu , Z. -Q. Shen , J. Yang , X. W. Zheng , A. Miyazaki , K. Sunada , H. J. Ma , J. J. Li , J. X. Sun , C. C. Pei

Using images from the Spitzer GLIMPSE Legacy survey, we have identified more than 300 extended 4.5 micron sources (abbreviated EGO, Extended Green Object, for the common coding of the [4.5] band as green in 3-color composite IRAC images).…

Among the tracers of the earliest phases in the massive star formation process, methanol masers have gained increasing importance. The phenomenological distinction between Class I and II methanol masers is based on their spatial association…

Astrophysics of Galaxies · Physics 2015-05-18 F. Fontani , R. Cesaroni , R. S. Furuya

We report the first systematic survey of molecular lines (including HCO+ (1-0) and 12CO, 13CO, C18O (1-0) lines at 3 mm band) towards a new sample of 88 massive young stellar object (MYSO) candidates associated with ongoing outflows (known…

Solar and Stellar Astrophysics · Physics 2014-11-20 Xi Chen , Zhi-Qiang Shen , Jing-jing Li , Ye Xu , Jin-hua He

We present a continuing study of a sample 44 molecular outflows, observed in 13CO lines, closely associated with 6.7GHz methanol masers, hence called Methanol Maser Associated Outflows (MMAOs). We compare MMAO properties with those of…

We present a study of the association between class I methanol masers and cold dust clumps from the ATLASGAL survey. It was found that almost 100% of class I methanol masers are associated with objects listed in the ATLASGAL compact source…

Astrophysics of Galaxies · Physics 2020-10-28 D. A. Ladeyschikov , J. S. Urquhart , A. M. Sobolev , S. L. Breen , O. S. Bayandina

We present the results of a Nobeyama 45-m water maser and ammonia survey of all 94 northern GLIMPSE Extended Green Objects (EGOs), a sample of massive young stellar objects (MYSOs) identified based on their extended 4.5 micron emission. We…

Astrophysics of Galaxies · Physics 2015-06-11 C. J. Cyganowski , J. Koda , E. Rosolowsky , S. Towers , J. Donovan Meyer , F. Egusa , R. Momose , T. P. Robitaille

Methanol masers which are traditionally divided into two classes provide possibility to study important parts of the star forming regions: Class~II masers trace vicinities of the massive YSOs while class~I masers are likely to trace more…

We report the result of a systematic methanol observation toward IRAS 19312+1950. The properties of the SiO, H2O and OH masers of this object are consistent with those of mass-losing evolved stars, but some other properties are difficult to…

Solar and Stellar Astrophysics · Physics 2015-08-06 Jun-ichi Nakashima , Andrej M. Sobolev , Svetlana V. Salii , Yong Zhang , Bosco H. K. Yung , Shuji Deguchi

The Australia Telescope National Facility Mopra millimetre telescope has been used to search for 95.1-GHz class I methanol masers towards sixty-two 6.6-GHz class II methanol masers. A total of twenty-six 95.1-GHz masers were detected,…

Astrophysics · Physics 2009-11-10 S. P. Ellingsen
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