Results 181 to 190 of about 794 (193)

Origin of water masers in W49N

1993
It 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
openaire   +1 more source

Water Maser and Envelope of Infrared Stars

Publications of the Astronomical Society of Japan, 1977
Abstract 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.
openaire   +1 more source

Search for Bright Masers in the Water Vapor Line towards the Dust Clumps of the Galaxy

Astronomy Reports, 2022
A P Tsivilev, A M Sobolev, Tsivilev A P
exaly  

A search for water masers associated with class II methanol masers – I. Longitude range 6°–20°

Monthly Notices of the Royal Astronomical Society, 2014
S P Ellingsen, S L Breen, J L Caswell
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, 2016
S P Ellingsen, S L Breen, J L Caswell
exaly  

Submillimetre water masers in circumstellar envelopes

Monthly Notices of the Royal Astronomical Society, 1995
J A Yates, R J Cohen, Richard E Hills
exaly  

Long-term study of water masers associated with Young Stellar Objects

Astronomy and Astrophysics, 2003
J Brand, R Cesaroni, G Comoretto
exaly  

Submillimetre water masers in circumstellar envelopes -- II. Variability

Monthly Notices of the Royal Astronomical Society, 1996
J A Yates, R J Cohen, Cohen R J
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, 2016
M Szymczak, M Olech, P Wolak
exaly  

A search for gravitationally lensed water masers in dusty quasars and star-forming galaxies

Monthly Notices of the Royal Astronomical Society, 2011
J P Mckean, C M V Impellizzeri, A L Roy
exaly