Results 81 to 90 of about 624,739 (259)

A Small Pathbreaking Spacecraft: Giants of Space Research (Bernard Blake, Dieter Hovestadt, and Edward Stone)

Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.
Abstract The Solar, Anomalous, and Magnetospheric Explorer (SAMPEX) mission launched in July 1992 was the first NASA “Small Explorer” project. It had the goal to show how space missions could be developed much more rapidly than had become the situation in the 1980s and 1990s.
D. N. Baker, G. M. Mason
wiley   +1 more source

The Relativistic Outflow Driven by the Large-scale Magnetic Field from an Accretion Disk

The Astrophysical Journal
Outflows/jets are ubiquitous in a wide range of astrophysical objects, yet the mechanisms responsible for their generation remain elusive. One hypothesis is that they are magnetically driven.
Wei Xie, Wei-Hua Lei
doaj   +1 more source

Relativistic jet models for two low-luminosity radio galaxies: evidence for backflow?

, 2012
We show that asymmetries in total intensity and linear polarization between the radio jets and counter-jets in two lobed Fanaroff-Riley Class I (FR I) radio galaxies, B2 0206+35 (UGC 1651) and B2 0755+37 (NGC 2484), can be accounted for if these jets are
A. H. Bridle, Aloy, Bondi, Canvin, Canvin, Falco, Fanaroff, Guidetti, Guidetti, Hardcastle, Katz-Stone, Katz-Stone, Laing, Laing, Laing, Laing, Laing, Laing, Laing, McNamara, Miller, Norman, Norman, Parma, Parma, Parma, Perucho, Press, R. A. Laing, Rossi, Saxton, Wardle   +31 more
core   +1 more source

Extragalactic Relativistic Jets and Nuclear Regions in Galaxies [PDF]

, 2006
Past years have brought an increasingly wider recognition of the ubiquity of relativistic outflows (jets) in galactic nuclei, which has turned jets into an effective tool for investigating the physics of nuclear regions in galaxies.
A. Pedlar, A.B. Peck, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Marscher, C. Fendt, C.G. Mundell, D.L. Meier, E. Ros, H. Falcke, H.R. Klöckner, I. Agudo, J.A. Zensus, J.E. Conway, J.L. Góomez, J.R. Goikoechea, K.I. Kellermann, M. Hujeirat, M. Kadler, M. Perucho, M. Perucho, M. Perucho, M. Sikora, M.L. Lister, N. Vlahakis, R.C. Walker, S. Koide, S.C. Unwin, S.G. Jorstad, S.S. Komissarov, V. Semenov, W. Junor   +37 more
core   +3 more sources

Chorus Wave–Driven Electron Dynamics in the Van Allen Belts: From Coherence to Diffusion

AGU Advances, Volume 6, Issue 6, December 2025.
Abstract The Van Allen radiation belts contain relativistic electrons trapped by Earth's magnetic field, posing serious risks to spacecraft. Chorus waves are known to accelerate these electrons via resonant interactions, but these interactions are inherently nonlinear and coherent.
Xin Tao, Zeyu An, Fulvio Zonca, Liu Chen, Jacob Bortnik   +4 more
wiley   +1 more source

Numerical Simulation of Radiatively Driven Transonic Relativistic Jets

The Astrophysical Journal
We perform the numerical simulations of axisymmetric, relativistic, optically thin jets under the influence of the radiation field of an accretion disk.
Raj Kishor Joshi, Indranil Chattopadhyay, Antonios Tsokaros, Priyesh Kumar Tripathi   +3 more
doaj   +1 more source

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

CHANDRA Observations of X-ray Jet Structure on kpc to Mpc Scales

, 2003
With its exquisite spatial resolution of better than 0.5 arcsecond, the Chandra observatory is uniquely capable of resolving and studying the spatial structure of extragalactic X-ray jets on scales of a few to a few hundred kilo-parsec.
B.P. Miller, Celotti, D.A. Schwartz, D.L. Jauncey, D.M. Worrall, D.W. Murphy, Dermer, E.S. Perlman, Felten, Ghisellini, H.L. Marshall, J.E.J. Lovell, M. Birkinshaw, Marshall, Pen, R.A. Preston, Schwartz, Tavecchio, Wilson   +18 more
core   +2 more sources

EVOLUTION OF GLOBAL RELATIVISTIC JETS: COLLIMATIONS AND EXPANSION WITH kKHI AND THE WEIBEL INSTABILITY [PDF]

, 2015
In the study of relativistic jets one of the key open questions is their interaction with the environment. Here we study the initial evolution of both electron–proton ( e – − p + ?> ) and electron–positron (e±) relativistic jets, focusing on their ...
K. Nishikawa, J. Frederiksen, Å. Nordlund, Y. Mizuno, P. Hardee, J. Niemiec, J. Gómez, A. Pe’er, I. Duţan, A. Meli, H. Sol, M. Pohl, D. Hartmann   +12 more
semanticscholar   +1 more source

Electron Energy Spectra in Jupiter's Radiation Belts From Juno‐JEDI

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract Radiation transport simulations of the Jupiter Energetic‐particle Detector Instrument (JEDI) onboard the Juno spacecraft were performed to understand its response to high energy electrons. Determination of the JEDI response function is the first rigorous effort of its kind and was used to reconstruct the true electron foreground, extending the
B. X. Zhu, I. Jun, P. Kollmann, C. Paranicas   +3 more
wiley   +1 more source