Results 71 to 80 of about 240,141 (195)

THE PROPAGATION OF RELATIVISTIC JETS IN EXTERNAL MEDIA [PDF]

The Astrophysical Journal, 2011
Relativistic jets are ubiquitous in astrophysical systems that contain compact objects. They transport large amounts of energy to large distances from the source, and their interaction with the ambient medium has a crucial effect on the evolution of the system.
Omer Bromberg, Ehud Nakar, Tsvi Piran, Re'em Sari   +3 more
openaire   +2 more sources

Electron‐Driven Instabilities in Jupiter's Magnetodisc

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract Thermal electrons in Jupiter's magnetodisc have been observed to be anisotropic with higher parallel temperature compared to perpendicular. In this work, we used previously‐derived electron properties (Sarkango et al., 2025, https://doi.org/10.1029/2025gl118209) to calculate electron β‖ ${\beta }_{\Vert }$ and compared the observed anisotropy ...
Y. Sarkango, A. H. Sulaiman, R. A. López, J. R. Szalay, R. Bandyopadhyay, F. Allegrini, R. W. Ebert, P. A. Damiano   +7 more
wiley   +1 more source

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

How do recollimation-induced instabilities shape the propagation of hydrodynamic relativistic jets?

Astronomy & Astrophysics
Context. Recollimation is a phenomenon of particular importance in the dynamical evolution of jets and in the emission of high-energy radiation. Additionally, the full comprehension of this phenomenon provides insights into fundamental properties of jets
Costa A., Bodo G., Tavecchio F., Rossi P., Coppi P., Sciaccaluga A., Boula S.   +6 more
doaj   +1 more source

Radiatively-driven general relativistic jets [PDF]

Journal of Astrophysics and Astronomy, 2018
8 pages, 8 figures, accepted for publication in a special issue of ...
Mukesh K. Vyas, Indranil Chattopadhyay
openaire   +2 more sources

A Theory of Leadership Meta‐Talk and the Talking‐Doing Gap

Journal of Management Studies, Volume 63, Issue 6, Page 2861-2893, September 2026.
Abstract We identify managers' meta‐level talk about the positive purpose, meaning, and significance of their actions as an overlooked type of leadership behaviour and call it leadership meta‐talk. We outline why leadership meta‐talk is not necessarily truthful or deceptive, but selective and loosely coupled with leadership practice.
Thomas Fischer, Mats Alvesson
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

X-ray polarization in relativistic jets [PDF]

Monthly Notices of the Royal Astronomical Society, 2009
We investigate the polarization properties of Comptonized X-rays from relativistic jets in Active Galactic Nuclei (AGN) using Monte Carlo simulations. We consider three scenarios commonly proposed for the observed X-ray emission in AGN: Compton scattering of blackbody photons emitted from an accretion disk; scattering of cosmic microwave background ...
McNamara, A, Kuncic, Z, Wu, K
openaire   +3 more sources

Spinning the Past Forward: Recording, Archiving, and (Re‐)listening to Siberian Phonograph Cylinders From the Jesup North Pacific Expedition

Museum Anthropology, Volume 49, Issue 2, Fall 2026.
ABSTRACT The article examines the history of phonographic recordings from the Jesup North Pacific Expedition (1897–1902), a venture that shaped the methods of Siberian and Arctic anthropology for decades. The authors—a historical anthropologist, a curator, and an Indigenous Sakha scholar—trace how audio recordings made during the expedition have moved ...
Dmitry Arzyutov, Veronika Trotter, Vera Solovyeva   +2 more
wiley   +1 more source

A Search for Supermassive Black Hole Binary Candidates in 46 yr Radio Light Curves of 83 Blazars

The Astrophysical Journal
The combined University of Michigan Radio Astronomy Observatory and Owens Valley Radio Observatory blazar monitoring programs at 14.5/15 GHz provide uninterrupted light curves of ∼ 46–50 yr duration for 83 blazars, selected from among the brightest and ...
B. Molina, P. Mróz, P. V. De la Parra, A. C. S. Readhead, T. Surti, M. F. Aller, J. D. Scargle, R. A. Reeves, H. Aller, M. C. Begelman, R. D. Blandford, Y. Ding, M. J. Graham, F. Harrison, T. Hovatta, I. Liodakis, M. L. Lister, W. Max-Moerbeck, V. Pavlidou, T. J. Pearson, V. Ravi, A. G. Sullivan, A. Synani, K. Tassis, S. E. Tremblay, J. A. Zensus   +25 more
doaj   +1 more source