Results 61 to 70 of about 176 (166)
Lorentz violation bounds from torsion trace fermion sector and galaxy M 51 data and chiral dynamos
European Physical Journal C: Particles and Fields, 2017 Earlier we have computed a Lorentz violation (LV) bound for torsion terms via galactic dynamos and found bounds similar to the one obtained by Kostelecky et al. (Phys Rev Lett 100:111102, 2008) which is of the order of $$10^{-31}$$ 10 - 31 GeV.
L. C. Garcia de Andrade
doaj +1 more source
The Radio Wave Polarization of Saturn Lightning Observed by Cassini
Journal of Geophysical Research: Space Physics, Volume 130, Issue 6, June 2025.Abstract We investigate the polarization of the radio waves emitted by lightning in Saturn's atmosphere, which are referred to as SEDs for Saturn Electrostatic Discharges. Using the complete SED data set retrieved by Cassini's RPWS (Radio and Plasma Wave Science) instrument we found that the circular polarization of SEDs below a frequency of 2 MHz ...
G. Fischer +4 more
wiley +1 more source
OH Maser Polarimetric Observations of Planetary Nebulae
The Astrophysical JournalWe present full-polarization observations of the four ground-state transitions of OH, carried out with the Australia Telescope Compact Array toward two very young planetary nebulae (PNe), IRAS 16333−4807 and IRAS 17393−2727. We detect Zeeman splitting in
L. Uscanga +8 more
doaj +1 more source
Surveys of the Milky Way and Magellanic System in the λ21-cm line of atomic hydrogen
EPJ Web of Conferences, 2012 In the next three years, surveys of the Northern and Southern skies using focal plane arrays on aperture synthesis radio telescopes will lead to a breakthrough in our knowledge of the warm and cool atomic phases of the interstellar medium and their ...
Dickey J.M.
doaj +1 more source
Magnetic reconnection as the driving factor behind high-mass protostellar luminosity flares
Communications PhysicsMagnetic 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 +14 more
doaj +1 more source
Detections of Compact Radio Continuum toward Methanol Maser Rings Using the VLA
The Astrophysical JournalHigh-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 +7 more
doaj +1 more source
Polarization Observations of a Sample of 6.7 GHz Methanol Masers
The Astrophysical JournalSpectra 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
Instabilities and the transport of polarized astrophysical maser radiation
The Astrophysical Journal, 1995 Time-dependent, radiative instabilities in the creation and transport of polarized astrophysical maser radiation in the presence of a magnetic field are calculated. The instabilities are similar to and occur under the same conditions as those found previously by Scappaticci & Watson for unpolarized maser radiation. The common limits in which the Zeeman
Bradley K. Wallin, William D. Watson
openaire +1 more source
The Astrophysical JournalWe 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 +5 more
doaj +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