Results 181 to 190 of about 5,254,583 (200)
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1993
The circumstellar envelopes of a sample red giants and supergiants have been investigated using MERLIN 22GHz H2O maser observations and single dish observations of the 22, 321, and 325GFfz water maser lines. The MERLIN data shows that inner circumstellar envelopes are generally asymmetrical with evidence for discs and bipolar outflows among the ...
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The circumstellar envelopes of a sample red giants and supergiants have been investigated using MERLIN 22GHz H2O maser observations and single dish observations of the 22, 321, and 325GFfz water maser lines. The MERLIN data shows that inner circumstellar envelopes are generally asymmetrical with evidence for discs and bipolar outflows among the ...
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Origin of water masers in W49N
1993It is proposed that H2O masers in star-forming regions occur early in the expansion of thin shells swept up by high-velocity winds from young massive stars. In W49N, confinement of the shell by a density distribution with an axial cavity can explain both the velocity field and the shape of the mass distribution.
Mordecai-Mark Mac Low, Moshe Elitzur
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1999
Maser phenomena in the universe are very general actions often occurring in molecular gases under the condition of population inversion. The emission mechanisms of astronomical masers, including mega masers, do not have any direct relations to the relativity or black hole physics.
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Maser phenomena in the universe are very general actions often occurring in molecular gases under the condition of population inversion. The emission mechanisms of astronomical masers, including mega masers, do not have any direct relations to the relativity or black hole physics.
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Water Maser and Envelope of Infrared Stars
Publications of the Astronomical Society of Japan, 1977Abstract The populations of levels including the ν2 vibrationally excited state for water molecules in the circumstellar envelope of maser/infrared sources are calculated. The maser power obtained for the 616–523 transition of water is of the order of 1043 photons s–1, which is consistent with observations.
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Search for Bright Masers in the Water Vapor Line towards the Dust Clumps of the Galaxy
Astronomy Reports, 2022Andrej M Sobolev +2 more
exaly
Accurate water maser positions from HOPS
Monthly Notices of the Royal Astronomical Society, 2014Steven N. Longmore +2 more
exaly
VLBI observations of the G25.65+1.05 water maser superburst
Monthly Notices of the Royal Astronomical Society, 2020Andrej M Sobolev +2 more
exaly
A search for water masers associated with class II methanol masers – II. Longitude range 341° to 6°
Monthly Notices of the Royal Astronomical Society, 2016Simon Ellingsen +2 more
exaly
A search for water masers associated with class II methanol masers – I. Longitude range 6°–20°
Monthly Notices of the Royal Astronomical Society, 2014Simon Ellingsen +2 more
exaly
The physics of water masers observable with ALMA and SOFIA: model predictions for evolved stars
Monthly Notices of the Royal Astronomical Society, 2016Andrej M Sobolev +2 more
exaly