Results 1 to 10 of about 794 (193)
Excited-state OH Masers in the Water Fountain Source IRAS 18460-0151
The Astrophysical Journal LettersWater fountain objects are generally defined as evolved stars with low to intermediate initial mass accompanied by high-velocity molecular jets detectable in the 22.235 GHz H _2 O maser line.
Xu-Jia Ouyang +5 more
doaj +2 more sources
5 cm OH Masers in Northern Star Formation Regions
The Astronomical JournalWe present a 6.0 GHz excited-state OH maser survey toward 155 northern star formation regions utilizing the Shanghai Tianma Radio Telescope. In total, we detect 44 6.0 GHz OH masers, 8 of which are new detections (one at 6016 MHz, two at 6030 MHz, and ...
Hai-Hua Qiao +6 more
doaj +2 more sources
The Parallax and 3D Kinematics of Water Masers in the Massive Star-forming Region G034.43+0.24
The Astrophysical Journal, 2023 We report a measurement of the trigonometric parallax of 22 GHz water masers in the massive star-forming region G034.43+0.24 as part of the Bar and Spiral Structure Legacy Survey using the Very Long Baseline Array.
Xiaofeng Mai +14 more
doaj +1 more source
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
The Astrophysical Journal Supplement Series, 2023 We have conducted a systematic line survey, primarily focused on transitions of the methanol and ammonia molecules, and monitoring observations of masers toward the high-mass star-forming region NGC 6334I.
Jiong-Heng Wu +12 more
doaj +1 more source
Simultaneous Time-monitoring Observations of H2O and SiO Masers toward the Supergiant VX Sagittarii
The Astrophysical Journal Supplement Series, 2023 We performed simultaneous monitoring observations of the 22.2 GHz H _2 O and 43.1/42.8/86.2/129.3 GHz SiO masers toward the red supergiant VX Sagittarii using the Korean VLBI Network single-dish telescopes.
Dong-Hwan Yoon +4 more
doaj +1 more source
183 GHz Water Megamasers in Active Galactic Nuclei: A New Accretion Disk Tracer
The Astrophysical Journal, 2023 We present the results of an Atacama Large Millimeter/submillimeter Array survey to identify 183 GHz H _2 O maser emission from active galactic nuclei (AGNs) already known to host 22 GHz megamaser systems.
Dominic W. Pesce +5 more
doaj +1 more source
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
doaj +1 more source
Proper Motions of Water Masers in W49 N Measured by KaVA
The Astrophysical Journal, 2023 We report the proper motions of 22 GHz water masers toward W49 N that were observed by the KVN and VERA Array (KaVA) during 2017 February–May. We found 263, 268, and 310 features in three successive epochs; they were distributed in a region of size 4 × 4
Kitiyanee Asanok +8 more
doaj +1 more source
CNGCs in Marchantia paleacea uncouple arbuscular mycorrhizal symbiosis and rhizoid development
New Phytologist, EarlyView.Rhizoid growth and AM fungal infection are uncoupled. Summary In Marchantia paleacea, MpaDMI1‐dependent nuclear Ca2+ oscillations are essential for arbuscular mycorrhizal (AM) fungal colonisation, indicating that endosymbiosis‐mediated nuclear Ca2+ signalling is a conserved feature of land plant–AM symbiosis.
Anson Ho Ching Lam +3 more
wiley +1 more source