Results 171 to 180 of about 7,116 (192)
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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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Observing astrophysical water masers Observing windows Masers as diagnostics Beaming Precise measurements Shocks Magnetic fields Multiple lines Pumping conditions constrain physical conditions n, T ...
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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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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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Magnetic fields in interstellar water masers
2008We report the first detection of Zeeman splitting in the (616−523) rotational transition of interstellar H2O masers. The measurements of Stokes parameter V and I spectra (circular polarization) have been performed at the MPIfR 100-m telescope. Depending on the hyperfine transition that is actually masing, we derive typical magnetic field strengths of B‖
D. Fiebig, R. Güsten
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Water Masers Coincident with IRAS Sources
1986The availability of the IRAS point-source catalogue makes more detailed studies of the correlation between H2O masers and far-infrared sources situated in dark clouds possible. Previous studies have concentrated on sources with bolometric luminosities above 104LOalthough it is known (see Genzel and Downes 1977, 1979) that some H20 masers are associated
J. G. A. Wouterloot, C. M. Walmsley
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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
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 22-GHz water masers within the giant molecular cloud associated with RCW 106
Monthly Notices of the Royal Astronomical Society, 2007shari Breen, Simon Ellingsen, Nadia Lo
exaly
Discovery of periodic and alternating flares of the methanol and water masers in G107.298+5.639
Monthly Notices of the Royal Astronomical Society: Letters, 2016Marian Szymczak +2 more
exaly