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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Evolution of the Outflow in the Water Fountain Source IRAS 18043–2116
The Astrophysical Journal, 2023 We present the spectral and spatial evolution of H _2 O masers associated with the water fountain source IRAS 18043−2116, found in observations with the Nobeyama 45 m Telescope and the Australia Telescope Compact Array. We have found new highest-velocity
L. Uscanga +7 more
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Images of Astrophysical Masers and their Variability in a Turbulent Medium: The 25 GHz Methanol Masers [PDF]
The Astrophysical Journal, 2003 We examine the influence of chance coherences in turbulent velocities for the creation of the images of astrophysical masers. Images are computed that represent the numerous masing features that are commonly observed in an extended masing region. Changes as a function of Doppler velocity can be seen in the appearance of these images. Variability in the
Sobolev, A. M. +2 more
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Detection of a High-velocity Jet from MWC 349A Traced by Hydrogen Recombination Line Maser Emission
The Astrophysical Journal Letters, 2023 MWC 349A is one of the rare stars known to have hydrogen radio recombination line (RRL) masers. The bright maser emission makes it possible to study the dynamics of the system at milliarcsecond (mas) precision.
Sirina Prasad +7 more
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Saturation and beaming in astrophysical masers
The Astrophysical Journal, 1985 A 'four-stream' model system of equations that are closely analogous to the equations of radiative transfer in a maser spectral line and are amenable to numerical solution are constructed. This model is used to investigate radiative transfer in asymmetric maser clouds.
C. Alcock, R. R. Ross
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Masers and Other Instabilities in a Weakly Magnetized Relativistic Plasma: Theory and the Astrophysical Relevance of the Maser [PDF]
The Astrophysical Journal, 2019 Abstract A sufficient condition for maser instability in a weakly magnetized relativistic plasma with an isotropic particle distribution function is given. Maser growth rates and polarizations are computed starting from the exact dielectric permittivity tensor of a magnetized plasma.
Andrei Gruzinov, Eli Waxman
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Saturation and beaming in astrophysical masers. III - Asymmetrically pumped masers
The Astrophysical Journal, 1986 There is reason to believe that the physical conditions in many astrophysical masers are far from homogeneous. In particular, if the maser pump involves the absorption of infrared photons, the pump rate may vary rapidly (perhaps exponentially) across the cloud.
C. Alcock, R. R. Ross
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Effects of Fully Relativistic Condition on Electron Cyclotron Maser Emission
The Astrophysical Journal, 2023 The electron cyclotron maser (ECM) instability is a very important nonthermal radiation mechanism. It has been developed by proposing various electron distribution functions as well as the relativistic resonance condition, called the semirelativistic ...
Lijie Zhang +4 more
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ALMA Detection of Masers and Dasars in the Hydrogen Recombination Lines of the Planetary Nebula Mz3
The Astrophysical JournalThe hydrogen recombination lines H30 α , H40 α , H42 α , H50 β , and H57 γ and the underlying bremsstrahlung continuum emission were detected with ALMA in the bipolar nebula Mz3.
Zulema Abraham +7 more
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Type‐III Solar Radio Bursts at Mars: A 16.5‐Year Catalog From Mars Express‐MARSIS at 0.1–5.5 MHz
Space Weather, Volume 24, Issue 10, October 2026.Abstract The most intense radio feature in the Solar System are the solar Type‐III radio bursts, which are associated with electron beams that propagate along open magnetic field lines. Although solar radio bursts have been studied since the 1940s, observations remain mainly restricted within 1 AU.
Beatriz Sánchez‐Cano +22 more
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