Results 51 to 60 of about 4,735 (200)

Magnetism in the Brown Dwarf Regime [PDF]

, 2019
A suite of discoveries in the last two decades demonstrate that we are now at a point where incorporating magnetic behavior is key for advancing our ability to characterize substellar and planetary systems. The next decade heralds the exciting maturation
Burgasser, Adam, Cruz, Kelle, Hallinan, Gregg, Kao, Melodie M., Pineda, J. Sebastian, Saur, Joachim, Schmidt, Sarah, Shulyak, Denis, Stevenson, David J., Williams, Peter, Yadav, Rakesh   +10 more
core   +1 more source

Pulsar current sheet Cerenkov radiation

, 2018
Plasma-filled pulsar magnetospheres contain thin current sheets wherein the charged particles are accelerated by magnetic reconnections to travel at ultra-relativistic speeds. On the other hand, the plasma frequency of the more regular force-free regions
Zhang, Fan
core   +1 more source

Dataset of Quiet Space Weather Periods for Ionospheric Studies

Earth and Space Science, Volume 13, Issue 4, April 2026.
Abstract The ionosphere is a dynamic environment regularly affected from above and from below. This study identifies periods within the years 2000–2023 when the impact from above, driven by space weather, was minimal. The quiet space weather periods have wide usage for two types of ionospheric studies. At first, studies of isolated space weather events
Šimon Mackovjak, Silvia Kostárová, Jaroslav Chum, Carsten Schmidt, Patrick Hannawald, Sabine Wüst, Lisa Küchelbacher, Vladimír Truhlík, Petra Koucká Knížová, Jaroslav Urbář, Lukáš Randuška, Filip Štempel, Ján Kubančák   +12 more
wiley   +1 more source

RRAT J1541+4703: A Rotating Radio Transient Exhibiting Normal Pulsar States

The Astrophysical Journal
Rotating radio transients (RRATs) are a class of pulsar-like objects characterized by intermittent radio emissions. Among them, RRATs that exhibit both RRAT and normal pulsar (NP) states may represent a key evolutionary stage from nulling pulsars to ...
Xin Xu, Qijun Zhi, Jie Tian, Jiguang Lu, Peng Jiang, Shijun Dang, Renxin Xu, Juntao Bai, Ke Yang   +8 more
doaj   +1 more source

Origin of electron cyclotron maser-induced radio emissions at ultra-cool dwarfs: magnetosphere-ionosphere coupling currents

, 2012
A number of ultra-cool dwarfs emit circularly polarised radio waves generated by the electron cyclotron maser instability. In the solar system such radio is emitted from regions of strong auroral magnetic field-aligned currents.
Burleigh, M. R., Casewell, S. L., Clarke, J. T., Cowley, S. W. H, Nichols, J. D., West, A. A., Wynn, G. A.   +6 more
core   +1 more source

Radio Emission from UV Cet: Auroral Emission from a Stellar Magnetosphere

The Astrophysical Journal, 2022
Abstract The archetypical flare star UV Cet was observed by MeerKAT on 2021 October 5–6. A large radio outburst with a duration of ∼2 hr was observed between 886 and 1682 MHz, with a time resolution of 8 s and a frequency resolution of 0.84 MHz, enabling sensitive dynamic spectra to be formed. The emission is characterized by three peaks
T. S. Bastian, W. D. Cotton, G. Hallinan
openaire   +3 more sources

Latitudinal and Hemispheric Responses of Solar Quiet Ionospheric Currents During Two Annular Solar Eclipses: Evidence From Low to Mid‐Latitude Observations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract A sudden drop in solar radiation during an annular (or total) eclipse directly affects ionospheric electrodynamics, primarily through the reduction of solar extreme ultraviolet (EUV) and soft X‐ray flux, which are responsible for generating the ionospheric plasma.
Charles Owolabi, Hyunju K. Connor, Don Hampton, V. Sai Gowtam, Dogacan Ozturk, Andrés Calabia, Amy M. Keesee   +6 more
wiley   +1 more source

Superluminal Wave Activation at Relativistic Magnetized Shocks

The Astrophysical Journal Letters
Fast radio bursts (FRBs) are extremely energetic radio transients, where some are generated in magnetar magnetospheres and winds. Despite a growing number of observations, their emission mechanisms remain elusive.
Jens F. Mahlmann, Logan Eskildsen, Arno Vanthieghem, Dawei Dai, Lorenzo Sironi   +4 more
doaj   +1 more source

Physics of radio emission in gamma-ray pulsars [PDF]

, 2016
Propagation of radio emission in pulsar magnetosphere is reviewed. The effects of polarization transfer, induced scattering and reprocessing to high energies are analysed with an especial emphasis on the implications for the gamma-ray pulsars.
Petrova, S. A.
core   +1 more source

Plasma Dynamics and Structure of Titan's Induced Magnetosphere From Wave, Magnetic Field, and Plasma Measurements

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract In this study, we combine Cassini fields and particle observations to investigate Titan's induced magnetosphere from the TA to T82 flybys, including flybys from the Cassini prime, equinox, and part of the solstice mission, to investigate the average location and the shape of Titan's induced magnetosphere. Although earlier studies have provided
K. Kim, R. Modolo, N. J. T. Edberg, M. Morooka, N. Romanelli, C. Moissard, M. K. G. Holmberg, C. Bertucci, J.‐J. Berthelier, P. Canu, R. Piberne, A. J. Coates, E. Dubinin, L. Regoli, W. S. Kurth, J.‐E. Wahlund, J. H. Waite, M. K. Dougherty   +17 more
wiley   +1 more source