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The properties and polarization of the H2O and CH3OH maser environment of NGC7538-IRS1
Stars: formation - masers: water, methanol - polarization - magnetic fi elds - ISM: individual: NGC7538
2011/10/17
NGC7538 is a complex massive star-forming region. The region is composed of several radio continuum sources, one of which is IRS1, a high-mass protostar, from which a 0.3 pc molecular bipolar outflow ...
The RMS Survey: Ammonia and water maser analysis of massive star forming regions
Stars: formation – Stars: early-type – ISM: molecules – ISM: radio lines
2011/10/12
The Red MSX Source (RMS) survey has identified a sample of ~1200 massive young stellar objects (MYSOs), compact and ultra compact HII regions from a sample of ~2000 MSX and 2MASS colour selected sourc...
H_2^{16}O and H_2^{18}O Maser Emission from Gas-Dust Clouds
astrophysical masers heavy-oxygen water star-forming regions active galactic nuclei
2011/10/11
The collisional pumping of H_2^{16}O and H_2^{18}O masers in hot dense gas-dust clouds has been simulated numerically. New data on the rate coefficients for collisional transitions from Faure et al. (...
A 95 GHz Class I Methanol Maser Survey Toward GLIMPSE Extended Green Objects (EGOs)
Maser Survey GLIMPSE Extended Green Objects
2011/10/9
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 ex...
Electron-cylotron maser radiation from electron holes
Electron cyclotron maser, electron holes, auroralacceleration, auroral radiation fine structure, auroral kilometricradiation, Jupiter radio emission, Planetary radio emission
2011/8/26
Electron holes are suggested to be an important source for generation of electron-cyclotron maser radiation.We demonstrate that electron holes generated in
a ring-horseshoe distribution in the aurora...
Discovery of the first methanol (CH3OH) maser in the Andromeda galaxy (M31)
the first methanol the Andromeda galaxy
2011/1/10
We present the first detection of a 6.7 GHz Class II methanol (CH3OH) maser in the Andromeda galaxy (M31). The CH3OH maser was found in a Very Large Array (VLA) survey during the fall of 2009. We have...
Two Epochs of Very Large Array Observations of Water Maser Emission in the active galaxy NGC 6240
galaxies active - galaxies individual (NGC 6240) - galaxies ISM - ISM - galaxies nuclei masers
2010/11/12
Studies of 22GHz H2O maser emission from the merging galaxy NGC 6240 with double nuclei are presented. Two epochs of Very Large Array (VLA) obser-vations in the A-configuration in spectral-line mode w...
Observational evidence for the shrinking of bright maser spots
Observational evidence bright maser spots
2011/1/10
The nature of maser emission means that the apparent angular size of an individual maser spot is determined by the amplification process as well as by the instrinsic size of the emitting cloud. Highly...
A Catalog of CH_3OH 7_0-6_1 A^+ Maser Sources in Massive Star-Forming Regions. II. Masers in NGC 6334F, G8.67-0.36, and M17
Galaxy Astrophysics (astro-ph.GA)
2010/12/27
We present Very Large Array observations of the 7_0-6_1 A^+ methanol maser transition at 44 GHz towards NGC 6334F, G8.67-0.36, and M17. These arcsecond resolution observations complete a previous, lar...
Backup Hydrogen Maser Steering System for Galileo Precise Timing Facility
Backup Hydrogen Maser Steering System Galileo Precise Timing Facility
2009/9/3
Two hydrogen masers (HMs) are used in the Precise Timing Facility to provide the physical realization of Galileo System Time, insuring the extremely high short-term stability required for the navigati...
High resolution oh maser survey in star forming regions。
Oh maser emission toward the young planetary nebula K3-35
maser emission young planetary nebula K3-35
2009/6/25
Oh maser emission toward the young planetary nebula K3-35。
A Study of the Variability of Water Maser Emission in a Sample of Young Stellar Objects
Water Maser Emission Young Stellar Objects
2009/6/16
A Study of the Variability of Water Maser Emission in a Sample of Young Stellar Objects。
A Study of the Variability of Water Maser Emission in a Sample of YSOS
Water Maser Emission YSOS
2009/6/16
A Study of the Variability of Water Maser Emission in a Sample of YSOS。
Evidence for Time Evolution in the Exciting Source of the Expanding Water Maser Bubble in Cepheus A
Time Evolution Expanding Water Maser Bubble Exciting Source Cepheus A
2009/6/15
Evidence for Time Evolution in the Exciting Source of the Expanding Water Maser Bubble in Cepheus A。