Results 71 to 80 of about 1,192 (180)

Microscopic Processes in Global Relativistic Jets Containing Helical Magnetic Fields: Dependence on Jet Radius

Galaxies, 2017
In this study, we investigate the interaction of jets with their environment at a microscopic level, which is a key open question in the study of relativistic jets.
Ken-Ichi Nishikawa, Yosuke Mizuno, Jose L. Gómez, Ioana Duţan, Athina Meli, Charley White, Jacek Niemiec, Oleh Kobzar, Martin Pohl, Asaf Pe’er, Jacob Trier Frederiksen, Åke Nordlund, Helene Sol, Philip E. Hardee, Dieter H. Hartmann   +14 more
doaj   +1 more source

Surface Charges Guided Quasi‐TEM‐mode Microwave Propagation along Dielectric Nanowire

Advanced Physics Research, Volume 5, Issue 7, July 2026.
According to Maxwell's equations, a single‐conductor transmission line cannot allow TEM‐mode electromagnetic wave propagation, however, this is based upon the assumption that dielectric material is isolated from the environment. In practice, surface electrostatic charges widely existed in nano‐materials with large surface‐to‐volume ratio.
BoYan Xu, Kaibo Zhang, Haojie Gao, Zhiyuan Gao, Kai Wang, Lihuan Zhao, Qi Yang, Bifeng Cui   +7 more
wiley   +1 more source

Characterization of the Western Pictor A Hotspot in Hard X-Rays with NuSTAR

The Astrophysical Journal
The origin of X-ray emission from the resolved kiloparsec-scale jets and hotspots of many active galactic nuclei remains uncertain, particularly where the X-ray emission is separate from the radio-optical synchrotron component.
Aamil Shaik, Eileen T. Meyer, Karthik Reddy, Sibasish Laha, Markos Georganopoulos   +4 more
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

Deterministic Propagation of Suprathermal Ions Through the Heliosphere

Journal of Geophysical Research: Space Physics, Volume 131, Issue 7, July 2026.
Abstract The PEPSSI instrument onboard New Horizons is sampling the energy range that bridges pickup and suprathermal He+ ${\mathrm{H}\mathrm{e}}^{+}$ ions for the first time in the outer heliosphere. New Horizons repeatedly encountered structures beyond 30 au that we interpret as the spiral of a corotating interaction region (CIR) for an extended ...
P. Kollmann, E. C. Roelof, M. E. Hill, R. B. Decker, P. Brandt, R. L. McNutt Jr., P. S. Mostafavi, R. Nikoukar, J. W. Parker, K. N. Singer, J. Spencer, A. Stern, A. J. Verbiscer   +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

Undifferenced Integer Ambiguity Resolution in GNSS Network Solutions: Benefits to Satellite Orbits, ERP, Geocenter, and Station Coordinates

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 7, July 2026.
Abstract Integer ambiguity resolution (IAR) is critical in high‐precision Global Navigation Satellite Systems (GNSS) data processing. While the legacy double‐differenced (DD) IAR is widely adopted by most analysis centers (ACs) of the International GNSS Service, undifferenced (UD) IAR is gaining popularity for global network solutions.
L. Tang, J. Wang, L. Nie, B. Cui, H. Zhu, M. Ge, H. Schuh   +6 more
wiley   +1 more source

Quasiperiodic Polarized Emissions from Kink Structure in Magnetized Relativistic Jets

The Astrophysical Journal
Recent polarimetric observations of blazars indicate the development of current-driven (CD) kink instability after passing the recollimation shocks in the relativistic jets and association with quasiperiodic oscillations (QPOs).
Xu-Fan Hu, Hong-Xuan Jiang, Yosuke Mizuno, Christian M. Fromm, Bhargav Vaidya   +4 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

Jets with a Twist: The Emergence of FR0 Jets in a 3D GRMHD Simulation of Zero-angular-momentum Black Hole Accretion

The Astrophysical Journal
Spinning supermassive black holes (BHs) in active galactic nuclei magnetically launch relativistic collimated outflows, or jets. Without angular momentum supply, such jets are thought to perish within 3 orders of magnitude in distance from the BH, well ...
Aretaios Lalakos, Alexander Tchekhovskoy, Omer Bromberg, Ore Gottlieb, Jonatan Jacquemin-Ide, Matthew Liska, Haocheng Zhang   +6 more
doaj   +1 more source