Results 21 to 30 of about 1,279 (175)
NE2025: An Updated Electron Density Model for the Galactic Interstellar Medium
The Astrophysical JournalFree electrons in the Galactic interstellar medium (ISM) disperse and scatter coherent radio waves, by amounts that depend on the distance to the radio source.
Stella Koch Ocker, James M. Cordes
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Variability of interstellar hydroxyl masers
The Astrophysical Journal, 1991 The spectra of 10 interstellar OH maser complexes were monitored in the 1665 MHz transition for variability on short (minutes-hours) and long (days-years) time scales. Eight of the sources exhibit short time scale variability in the relative amplitudes of the spectral features above that expected due to radiometer noise, and all sources for which ...
Andrew W. Clegg, James M. Cordes
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Variability of Interstellar Water Vapor Masers [PDF]
Highlights of Astronomy, 1998 We present some results of observations of H2O masers (1.35 cm line) in Star-Forming Regions. The observations have been made from the beginning of the eighties at the 22 m radiotelescope at Pushchino, Russia (Lekht et al. 1995). The time interval between two consecutive observations is about one month.
J.E. Mendoza-Torres, E.E. Lekht
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Spatial offsets between interstellar bone-like filaments, radio masers, and cold diffuse CO gas, in the Scutum spiral arm [PDF]
Astrophysics and Space Science, 2019 The advent of more precise measurements of distance estimates for some objects (Bayesian estimates for filaments, trigonometric estimates for masers) permits a better comparison of their relative locations, and a comparison with a most recent spiral arm ...
J. Vallée
semanticscholar +1 more source
Interstellar masers: some theoretical considerations [PDF]
Monthly Notices of the Royal Astronomical Society, 1982 David J. Field
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Long-term Variability of Class I Methanol Masers in the High-mass Star-forming Region DR21(OH) [PDF]
Astrophysical Journal, 2022 High-mass stars play an important role in the interstellar medium, but much remains to be known about their formation. Class I methanol masers may be unique tracers of an early stage of high-mass star formation, and a better understanding of such masers ...
N. Wenner, A. Sarma, E. Momjian
semanticscholar +1 more source
Parallaxes and proper motions of interstellar masers toward the Cygnus X star-forming complex. I. Membership of the Cygnus X region [PDF]
, 2011 Context. Whether the Cygnus X complex consists of one physically connected region of star formation or of multiple independent regions projected close together on the sky has been debated for decades.
K. Rygl +15 more
semanticscholar +1 more source
ATCA survey of H2O masers in the Large Magellanic Cloud [PDF]
, 2013 We have analysed archival data taken with the Australia Telescope Compact Array (ATCA) during 2001–2003 and detected nine new interstellar and circumstellar H2O masers in the Large Magellanic Cloud (LMC). This takes the total number of star formation H2O
イマイ, ヒロシ +13 more
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The Astrophysical Journal Supplement Series, 2023 We present a statistical study of infrared variability using the Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) database for a sample consisting of 1085 high-mass young stellar objects (YSOs) related to 6.7 GHz methanol masers.
Shi-Min Song +8 more
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