MASSIVE STAR FORMATION TOWARD G28.87+0.07 (IRAS 18411-0338) INVESTIGATED BY MEANS OF MASER KINEMATICS AND RADIO TO INFRARED CONTINUUM OBSERVATIONS

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	MASSIVE STAR FORMATION TOWARD G28.87+0.07 (IRAS 18411-0338) INVESTIGATED BY MEANS OF MASER KINEMATICS AND RADIO TO INFRARED CONTINUUM OBSERVATIONS
	Li, J. J.1,2; Moscadelli, L.2; Cesaroni, R.2; Furuya, R. S.3; Xu, Y.1 ; Usuda, T.3; Menten, K. M.4; Pestalozzi, M.5; Elia, D.5; Schisano, E.5
刊名	ASTROPHYSICAL JOURNAL
	2012-04-10
卷号	749 期号:1 页码:47(16pp)
关键词	ISM: individual objects (G28.87+0.07) ISM: kinematics and dynamics masers techniques: interferometric
ISSN号	0004-637X
英文摘要	We used the Very Long Baseline Array and the European VLBI Network to perform phase-referenced very long baseline interferometry observations of the three most powerful maser transitions associated with the high-mass star-forming region G28.87 + 0.07: the 22.2 GHz H2O, 6.7 GHz CH3OH, and 1.665 GHz OH lines. We also performed Very Large Array (VLA) observations of the radio continuum emission at 1.3 and 3.6 cm and Subaru observations of the continuum emission at 24.5 mu m. Two centimeter-continuum sources are detected and one of them (named hot molecular core (HMC)) is compact and placed at the center of the observed distribution of H2O, CH3OH, and OH masers. The bipolar distribution of line-of-sight velocities and the pattern of the proper motions suggest that the water masers are driven by a (proto) stellar jet interacting with the dense circumstellar gas. The same jet could both excite the centimeter-continuum source named HMC (interpreted as free-free emission from shocked gas) and power the molecular outflow observed at larger scales-although one cannot exclude that the free-free continuum is rather originating from a hypercompact H II region. At 24.5 mu m, we identify two objects separated along the north-south direction, whose absolute positions agree with those of the two VLA continuum sources. We establish that similar to 90% of the luminosity of the region (similar to 2 x 10(5) L-circle dot) is coming from the radio source HMC, which confirms the existence of an embedded massive young stellar object exciting the masers and possibly still undergoing heavy accretion from the surrounding envelope.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	YOUNG STELLAR OBJECTS ; 2-DIMENSIONAL RADIATIVE-TRANSFER ; FORMING REGIONS ; HII-REGIONS ; H2O MASERS ; PROTOSTELLAR ENVELOPES ; PHYSICAL PARAMETERS ; MOLECULAR OUTFLOWS ; DENSITY STRUCTURE ; METHANOL MASERS
收录类别	SCI
语种	英语
WOS记录号	WOS:000302175500047
公开日期	2013-01-31
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8115]
专题	紫金山天文台_紫金山天文台青海观测站
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 2.INAF Osservatorio Astrofis Arcetri, I-50125 Florence, Italy 3.Natl Inst Nat Sci, Natl Astron Observ Japan, Subaru Telescope, Hilo, HI 96720 USA 4.Max Planck Inst Radioastron, D-53121 Bonn, Germany 5.INAF Ist Fis Spazio Interplanetario, I-00133 Rome, Italy
推荐引用方式 GB/T 7714	Li, J. J.,Moscadelli, L.,Cesaroni, R.,et al. MASSIVE STAR FORMATION TOWARD G28.87+0.07 (IRAS 18411-0338) INVESTIGATED BY MEANS OF MASER KINEMATICS AND RADIO TO INFRARED CONTINUUM OBSERVATIONS[J]. ASTROPHYSICAL JOURNAL,2012,749(1):47(16pp).
APA	Li, J. J..,Moscadelli, L..,Cesaroni, R..,Furuya, R. S..,Xu, Y..,...&Schisano, E..(2012).MASSIVE STAR FORMATION TOWARD G28.87+0.07 (IRAS 18411-0338) INVESTIGATED BY MEANS OF MASER KINEMATICS AND RADIO TO INFRARED CONTINUUM OBSERVATIONS.ASTROPHYSICAL JOURNAL,749(1),47(16pp).
MLA	Li, J. J.,et al."MASSIVE STAR FORMATION TOWARD G28.87+0.07 (IRAS 18411-0338) INVESTIGATED BY MEANS OF MASER KINEMATICS AND RADIO TO INFRARED CONTINUUM OBSERVATIONS".ASTROPHYSICAL JOURNAL 749.1(2012):47(16pp).