Results 81 to 90 of about 794 (193)
Large-scale Effect of an Accretion Burst in the High-Mass Young Stellar Object G358.93-0.03-MM1
The Astronomical JournalThe high-mass young stellar object G358.93-0.03-MM1 underwent a rapid accretion burst event from 2019 January to June, resulting in flares observed in most class II methanol maser transitions starting in mid-January.
Dan Miao +5 more
doaj +1 more source
AKR Observations From All Local Times Indicate Substorm Activity
Journal of Geophysical Research: Space Physics, Volume 130, Issue 9, September 2025.Abstract Auroral Kilometric Radiation (AKR) is known to present emission at lower frequencies near substorm onset, corresponding to activation of higher altitude sources along auroral magnetic field lines and acting as a proxy of the vertical distribution of acceleration processes during these events.
J. E. Waters +6 more
wiley +1 more source
On Water Masers in Circumstellar Shells
The Astrophysical Journal, 1998 Detection rates for 22 GHz water masers from O-rich circumstellar shells are always less than 100%. This can in part be understood by revisiting high angular-resolution observations of masers in OH 39.7 + 1.5 and red supergiants. The pattern of occurrence for water masers around the pulsation cycle of OH 39.7 + 1.5 suggests that a detectable maser only
openaire +1 more source
SiO v = 1 J = 5 → 4 Maser Emission from the Root of the “Water Fountain” Source W 43A
The Astrophysical JournalWe report here the first mapping of SiO v = 1 J = 5 → 4 maser emission toward the “water fountain” source W 43A in order to explore the central stellar system driving the collimated, bipolar, fast jet.
Hiroshi Imai +5 more
doaj +1 more source
The Discovery of Polarized Water Vapor Megamaser Emission in a Molecular Accretion Disk
The Astrophysical Journal LettersFor the first time in an extragalactic source, we detect linearly polarized H _2 O maser emission associated with the molecular accretion disk of NGC 1068.
Jack F. Gallimore +5 more
doaj +1 more source
CMZoom. IV. Incipient High-mass Star Formation throughout the Central Molecular Zone
The Astrophysical JournalIn this work, we constrain the star-forming properties of all possible sites of incipient high-mass star formation in the Milky Way’s Galactic Center.
H Perry Hatchfield +17 more
doaj +1 more source
The masers towards IRAS 20126 + 4104
, 2005 We present MERLIN observations of OH, water and methanol masers towards the young high mass stellar object IRAS 20126+4104. Emission from the 1665-MHz OH, 22-GHz H2O and 6.7-GHz CH3OH masers is detected and all originates very close to the central ...
K. A. Edris +3 more
core +1 more source
Water masers in Compton-thick AGN [PDF]
, 2019 Aims. Investigations of H2O maser galaxies at X-ray energies reveal that most active galactic nuclei (AGN) associated with water masers are characterized by high levels of absorption. With the aim of finding new maser sources for possible interferometric
R. Della Ceca +11 more
core +1 more source
Properties of H2O Masers and Their Associated Sources in Sagittarius B2
The Astrophysical JournalWe present high-resolution Karl G. Jansky Very Large Array observations of the 22 GHz H _2 O maser line in the extended Sagittarius B2 cloud. We detect 499 H _2 O masers across the observed velocities between −39 and 172 km s ^−1 .
Nazar Budaiev +7 more
doaj +1 more source
Observing astrophysical water masers Observing windows Masers as diagnostics Beaming Precise measurements Shocks Magnetic fields Multiple lines Pumping conditions constrain physical conditions n, T ...
openaire +1 more source