Results 21 to 30 of about 794 (193)
The Astrophysical Journal, 1998 Measurements of the 616 → 523 line of H2O at 1.3 cm in the Orion region of star formation are reported. With a spatial resolution of ≈ 01, H2O maser emission was detected in two regions: Orion BN/KL and Orion S. The well-known masers in the BN/KL region are distributed in a 30'' by 30'' area. The "shell" masers, within the BN/KL region, are distributed
R. A. Gaume +4 more
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The Polarized Water Maser in Orion [PDF]
Symposium - International Astronomical Union, 1992 We present the results of 12 years of observations of the 8 km s−1 water maser in Orion. Four large flares in the flux density were observed, as well as variability in the degree and angle of polarization. The profile of the line is also variable, indicating the superposition of several sources.
Z. Abraham, J. W. S. Vilas Boas
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Photometric Study of Galaxies with Water and without Detected Water Masers in Different Spectal Ranges [PDF]
, 2020 Studies of water masers in other galaxies play an important role in various fields of astronomy, but the probability of detection of these masers is extremely low.
Volkov, K. V. +5 more
core +1 more source
Discovery of SiO Masers in the "Water Fountain" Source IRAS 16552-3050 [PDF]
, 2022 In this paper, we report new detections of SiO v = 1 and v = 2 J = 1 -> 0 masers in the "water fountain" source IRAS 16552-3050, which was observed with the Nobeyama 45 m telescope during 2021 March-April.
Tafoya, Daniel +21 more
core +1 more source
Interacting masers and the extreme brightness of astrophysical water masers
The Astrophysical Journal, 1989 Extreme surface brightnesses have long been reported for water masers which are well beyond what is found in self-consistent, theoretical investigations of these masers. The transport of maser radiation is calculated when two masers, having the properties inferred for the numerous weaker masers and separated by distances characteristic of the molecular
Shuji Deguchi, William D. Watson
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Probing AGN with Water Masers [PDF]
Symposium - International Astronomical Union, 1996 Observations of the angular distribution of the water masers in the nucleus of NGC4258 reveal the presence of a thin molecular disk in nearly perfect Keplerian orbit (Miyoshi et al., 1995; Moran et al., 1995). About 300 galaxies have been searched for nuclear water masers to a limiting sensitivity of about 0.1 Jy (e.g., Braatz, 1996); and 16 masers ...
J. M. Moran +6 more
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Water masers in dusty environments [PDF]
Astronomy & Astrophysics, 2004 14 pages, 10 figures; submitted to A& ...
Babkovskaia, Natalia, Poutanen, Juri
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Supersonic Water Masers in 30 Doradus
The Astrophysical Journal, 2001 We report on extremely high velocity molecular gas, up to -80 km/s relative to the ambient medium, in the giant star-formation complex 30 Doradus in the Large Magellanic Cloud (LMC), as observed in new 22 GHz H2O maser emission spectra obtained with the Mopra radio telescope.
van Loon, Jacco Th., Zijlstra, Albert A.
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A water maser flare in W49N [PDF]
Astronomy & Astrophysics, 2002 We report the results of our short time scale monitoring observations of W49N. Three water maser features were found to show obvious variations in flux density, line width and center velocity. Over a period of about 22 days, the -88.3, -56.9 and -12.8 km s(-1) features declined linearly in flux density at rates of 57, 113, 98.8 Jy per day, respectively.
J. J. Zhou, X. W. Zheng, Y. X. Chen
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A model for extremely powerful extragalactic water masers [PDF]
, 1988 The reasons for the differences between extremely powerful extragalatic water masers (EPEWMs) and strong Galactic H/sub 2/O masers are discussed. This model quite successfully explains many important characteristics of EPEWMs; the rapid time variations ...
Alcock, C., Wu, Ying-Cheng
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