Results 91 to 100 of about 440 (199)

Magnetic reconnection as the driving factor behind high-mass protostellar luminosity flares

Communications Physics
Magnetic reconnection, a critical process in astrophysical luminosity outbursts like solar flares, may also underpin such events in high-mass young stellar objects (HMYSOs).
Xi Chen, Jun-Ting Liu, Olga S. Bayandina, Shi-Min Song, Sergey Khaibrakhmanov, Andrej M. Sobolev, Sheng-Yuan Liu, Zhi-Wei Chen, Da-Lei Li, Bin Li, Bo Xia, Zhi-Qiang Shen, Tie Liu, Pak-Shing Li, Xiao-Juan Zhang   +14 more
doaj   +1 more source

Detections of Compact Radio Continuum toward Methanol Maser Rings Using the VLA

The Astrophysical Journal
High-mass protostars are deeply embedded in dust inside their natal cores and are not easily detectable. However, maser emission at centimeter wavelengths, owing to its high brightness, enables us to study gas kinematics in protostars’ circumstellar ...
Anna Bartkiewicz, Olga Bayandina, Alberto Sanna, Marian Szymczak, Luca Moscadelli, Agnieszka Kobak, Huib Jan van Langevelde, Ashwin Varma   +7 more
doaj   +1 more source

Inward motions of the compact SiO masers around VX Sagittarii

, 2006
We report Very Long Baseline Array (VLBA) observations of 43 GHz upsilon = 1, J = 1-0 SiO masers in the circumstellar envelope of the M-type semiregular variable star VX Sgr at three epochs during 1999 April-May.
Kamohara, R, Imai, H, Shen, ZQ, Chen, X
core  

Discovery of H2O, CH3OH, and OH Masers in the Extreme Outer Galaxy

, 2018
We present the results of a single dish interstellar maser survey toward similar to 200 molecular clouds. (MCs) in the extreme outer Galaxy. (EOG) possibly lying in the Outer Scutum- Centaurus. (OSC) arm.
Chen, Xi, Henkel, C., Yang, J., Xu, Y., Chen, X., Fang, M., Henkel, Christian, Sun, Yan, Yang, Ji, Xu, Ye, Jiang, Z., Menten, Karl M., Menten, K., Jiang, Zhi-Bo, Sun, Y., Chen, Xue-Peng, Fang, Min   +16 more
core   +1 more source

Polarization Observations of a Sample of 6.7 GHz Methanol Masers

The Astrophysical Journal
Spectra of 6.7 GHz methanol masers from 21 pointings of known star-forming regions are reported. C -band observations, using the Green Bank Telescope in full Stokes mode, have measured how polarization properties vary across the maser profiles in each ...
Paul Fallon, Derck P. Smits
doaj   +1 more source

On the relationship of UC Hii regions and class II methanol masers. I. source catalogs [PDF]

, 2016
We conducted Very Large Array C-configuration observations to measure positions and luminosities of Galactic Class II 6.7 GHz methanol masers and their associated ultra-compact H ii regions.
Reid, M. J., Zheng, X., RYGL, Kazi Lucie Jessica, Menten, K. M., Urquhart, J.S., Bartkiewicz, A., Hu, B., Urquhart, J., Rygl, K., Menten, K., Reid, M., Wu, Y., Urquhart, J. S.   +12 more
core   +1 more source

Inner Workings: Astronomers are redrawing our corner of the Milky Way. [PDF]

Proc Natl Acad Sci U S A, 2021
Croswell K.
europepmc   +1 more source

An Updated Model for the Perseus Spiral Arm from Trigonometric Parallax and 3D Kinematic Distances of Distant Massive Stars

The Astrophysical Journal
We report trigonometric parallaxes and proper motions for three water masers and one methanol maser obtained with the Very Long Baseline Array as part of the Bar and Spiral Structure Legacy Survey.
L. J. Hyland, M. J. Reid, S. P. Ellingsen, A. Brunthaler, X. W. Zheng, K. M. Menten   +5 more
doaj   +1 more source

Propagation of radiation in astrophysical media: Gravitational lenses and astrophysical masers

, 1992
In Part I the time variability of the radiation emitted by astrophysical masers is studied by numerically solving the system of time dependent non-linear partial differential equations of radiative transfer through a masing gas.
Scappaticci, Gerardo Angelo
core  

A search for water masers toward extrasolar planets

, 2006
Context: Water is the most common triatomic molecule in the universe and the basis of life on Earth. Astrophysical masers have been widely studied in recent years and have been shown to be invaluable probes of the details of the environment in which ...
Lineweaver, Charles, V. Minier, C. Lineweaver, Minier, V.   +3 more
core   +1 more source