Results 1 to 10 of about 176 (166)
Laboratory astrophysics: Investigation of planetary and astrophysical maser emission [PDF]
Space Science Reviews, 2013 This paper describes a model for cyclotron maser emission applicable to planetary auroral radio emission, the stars UV Ceti and CU Virginus, blazar jets and astrophysical shocks. These emissions may be attributed to energetic electrons moving into convergent magnetic fields that are typically found in association with dipole like planetary ...
Alan D. R. Phelps +2 more
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Cyclotron Maser Radiation from Astrophysical Shocks
Astrophysical Journal, 2003 One of the most popular coherent radio emission mechanisms is electron cyclotron maser instability. In this article we demonstrate that electron cyclotron maser emission is directly associated with particular types of charged particle acceleration such as turbulence and shocks commonly inferred in astrophysical plasmas.
José Tito Mendonça, Robert Bingham
exaly +4 more sources
Numerical simulation of astrophysical cyclotron-maser emission [PDF]
2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 Numerical simulations have been conducted at the University of Strathclyde to study the spatial growth rate and emission topology of the cyclotron maser instability responsible for auroral magnetospheric radio emission from stars and planets and intense non-thermal radio emission in other astrophysical contexts.
S L McConville +2 more
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Astrophysical water masers: Line profiles analysis [PDF]
Astronomy and Astrophysics, 2005 The changes in the spectral line profile of the 22GHz H2O maser are calculated as a function of emerging maser flux. We address not only the narrowing and re-broadening of the maser lines, but also the deviations of Gaussian symmetry as a result of the various hyperfine components of the 22 GHz maser line.
Wouter Vlemmings, H J van Langevelde
exaly +3 more sources
Astrophysical Maser Radiation from a Turbulent Medium: Application to 25 GHz Methanol Masers [PDF]
Astrophysical Journal, 1998 Spectral and spatial distributions are calculated for astrophysical maser radiation that emerges from a turbulent medium. Turbulent-velocity fields are created by sampling from Kolmogorov-like distributions. The maps of maser emission created in a turbulent medium appear as if the emission results from a collection of isolated clumps moving with ...
Andrej M Sobolev
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Gaussian Spectral Line Profiles of Astrophysical Masers
Astrophysical Journal, 2002 4 pages with 3 figures embedded in paper; uses AASTEX with emulateapj5.sty; accepted for publication in ApJ (Letters)
Watson, W. D. +2 more
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The Astrophysical Journal, 2023 Because of detailed monitoring of the 22.2 GHz water maser, carried out from 2021 October to 2023 May, a very powerful flare phenomenon was detected in the galactic object W51 near the radial velocity of 60 km s ^−1 with the amplitude of 140 kJy.
A. E. Volvach +2 more
doaj +1 more source
An Updated Reference Frame for the Galactic Inner Parsec
The Astrophysical Journal, 2023 Infrared observations of stellar orbits about Sgr A* probe the mass distribution in the inner parsec of the Galaxy and provide definitive evidence for the existence of a massive black hole.
Jeremy Darling +5 more
doaj +1 more source
Amplification of OAM radiation by astrophysical masers [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 We extend the theory of astrophysical maser propagation through a medium with a Zeeman-split molecular response to the case of a non-uniform magnetic field, and allow a component of the electric field of the radiation in the direction of propagation: a characteristic of radiation with orbital angular momentum.
Gray M. D. +3 more
openaire +2 more sources
Polarized Maser Emission with In-source Faraday Rotation
The Astrophysical Journal, 2023 We discuss studies of polarization in astrophysical masers with particular emphasis on the case where the Zeeman splitting is small compared to the Doppler profile, resulting in a blend of the transitions between magnetic substates.
T. L. Tobin, M. D. Gray, A. J. Kemball
doaj +1 more source