Results 91 to 100 of about 624,739 (259)

Jump-starting Relativistic Flows and the M87 Jet

The Astrophysical Journal
We point out the dominant importance of plasma injection effects of relativistic winds from pulsars and black holes. We demonstrate that outside the light cylinder, the magnetically dominated outflows sliding along the helical magnetic field move nearly ...
Maxim Lyutikov, Ahmad Ibrahim
doaj   +1 more source

Signatures of Relativistic Helical Motion in the Rotation Measures of AGN Jets

, 2009
Polarization has proved an invaluable tool for probing magnetic fields in relativistic jets. Maps of the intrinsic polarization vectors have provided the best evidence to date for uniform, toroidally dominated magnetic fields within jets.
Abraham Loeb, Asada, Asada, Avery E. Broderick, Broderick, De Villiers, Doeleman, Hagiwara, Jones, Kharb, Lister, López, McKinney, Taylor, Taylor, Taylor, Vlahakis, Walker, Zavala, Zavala, Zavala, Zavala   +21 more
core   +1 more source

Including Atmospheric Backscatter Effects in Modeling of EMIC Wave‐Driven Precipitation

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract Pitch‐angle diffusion is a key mechanism driving radiation belt electron loss into the atmosphere. However, traditional bounce‐averaged models, which assume complete atmospheric absorption for loss cone electrons, cannot accurately quantify the loss cone fluxes.
Zhi‐Gu Li, Weichao Tu, Richard Selesnick, Luisa Capannolo, Grant Berland, Qianli Ma   +5 more
wiley   +1 more source

An Unusual Change in the Radio Jets of GRS 1915+105

The Astrophysical Journal
We compare Very Large Array observations of GRS 1915+105 made in 1994 and 2023, with nearly three decades of difference. The source has experienced intriguing major changes.
Luis F. Rodríguez, I. Félix Mirabel
doaj   +1 more source

Radiation from accelerated particles in relativistic jets with shocks, shear-flow, and reconnection

EPJ Web of Conferences, 2013
We have investigated particle acceleration and shock structure associated with an unmagnetized relativistic jet propagating into an unmagnetized plasma for electron-positron and electron-ion plasmas.
Nishikawa K.-I., Hardee P., Mizuno Y., Duţan I., Zhang B., Medvedev M, Choi E.J., Min K. W., Niemiec J., Nordlund Å., Frederiksen J., Sol H., Pohl M., Hartmann D. H., Marscher A., Gómez J. L.   +15 more
doaj   +1 more source

Leptonic and Hadronic Radiative Processes in Supermassive-Black-Hole Jets

Galaxies, 2020
Supermassive black holes lying in the center of galaxies can launch relativistic jets of plasma along their polar axis. The physics of black-hole jets is a very active research topic in astrophysics, owing to the fact that many questions remain open on ...
Matteo Cerruti
doaj   +1 more source

Global Validation of the Data‐Assimilative VERB‐3D Code for the Radiation Belts

Space Weather, Volume 23, Issue 12, December 2025.
Abstract Electrons within Earth's radiation belts exhibit large variability in space and time during geomagnetic storms, which could potentially damage satellites and harm astronauts in space. Physics‐based models describe the evolution of energetic electrons in the radiation belts, but they may suffer from uncertainties and errors, particularly in the
Marina García Peñaranda, Yuri Y. Shprits, Alexander Y. Drozdov, Angélica M. Castillo Tibocha, Bernhard Haas, Mátyás Szabó‐Roberts, Dedong Wang, Sebastián Cervantes, Yoshizumi Miyoshi, Nana Higashio, Takefumi Mitani, Takeshi Takashima, Iku Shinohara   +12 more
wiley   +1 more source

Active Galactic Nuclei: Jets as the Source of Hadrons and Neutrinos

Acta Polytechnica CTU Proceedings, 2014
Active galactic nuclei are extragalactic sources, and their relativistic hot-plasma jets are believed to be the main candidates of the cosmic-ray origin, above the so-called knee region of the cosmic-ray spectrum.
Athina Meli, Paolo Ciarcelluti
doaj   +1 more source

Interstellar Migration, the Population ‘Problem’ and the Climate Emergency

Critical Quarterly, EarlyView.
Anna Hartnell
wiley   +1 more source

Excitation of Whistler‐Mode Waves by an Electron Temperature Anisotropy in a Laboratory Plasma

Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract Naturally occurring whistler‐mode waves in near‐Earth space play a crucial role in accelerating electrons to relativistic energies and scattering them in pitch angle, driving their precipitation into Earth's atmosphere. Here, we report on the results of a controlled laboratory experiment focusing on the excitation of whistler waves via ...
Donglai Ma, Xin An, Jia Han, Shreekrishna Tripathi, Jacob Bortnik, Anton V. Artemyev, Vassilis Angelopoulos, Walter Gekelman, Patrick Pribyl   +8 more
wiley   +1 more source