Results 121 to 130 of about 45,937 (210)

A Study of Particle Acceleration in Blazar Jets

The Astrophysical Journal
The particle acceleration of blazar jets is crucial to high-energy astrophysics, yet the acceleration mechanism division in blazar subclasses and the underlying nature of these mechanisms remain elusive. In this work, we utilized the synchrotron spectral
Hubing Xiao, Wenxin Yang, Yutao Zhang, Shaohua Zhang, Junhui Fan, Liping Fu, Jianghe Yang   +6 more
doaj   +1 more source

Particles in Relativistic Magnetohydrodynamic Jets. II. Bridging Jet Dynamics with Multi–wave band Nonthermal Emission Signatures

The Astrophysical Journal
Relativistic magnetized jets, originating near black holes, are observed to exhibit substructured flows. In this study, we present synthetic synchrotron-emission signatures for different lines of sight and frequencies, derived from three-dimensional ...
Ravi Pratap Dubey, Christian Fendt, Bhargav Vaidya   +2 more
doaj   +1 more source

Multimessenger Emission Derived from Relativistic Magnetized Jet Dynamics Using a Multizone Framework

The Astrophysical Journal
Relativistic jets from active galactic nuclei (AGN) are highly energetic and emit radiation across a wide range of frequencies. Despite several observational studies, their particle composition still remains a key open question.
Harshita Bhuyan, Bhargav Vaidya, Christian Fendt, Aditya Sharma   +3 more
doaj   +1 more source

Probing medium response via strangeness enhancement around quenched jets

Physics Letters B
Jet-induced medium excitation is a crucial part of jet interactions with the quark-gluon plasma (QGP) in relativistic heavy-ion collisions, and has recently been confirmed by experiment for the first time.
Ao Luo, Shanshan Cao, Guang-You Qin
doaj   +1 more source

Kinetic Simulations of the Kruskal–Schwarzschild Instability in Accelerating Striped Outflows: Dynamics and Energy Dissipation

The Astrophysical Journal
Astrophysical relativistic outflows are launched as Poynting-flux dominated, yet the mechanism governing efficient magnetic dissipation, which powers the observed emission, is still poorly understood. We study magnetic energy dissipation in relativistic “
William Groger, Hayk Hakobyan, Lorenzo Sironi   +2 more
doaj   +1 more source

Rapid jet production and suppression during fast state transitions in the black hole X-ray binary MAXI J1348–630

Astronomy & Astrophysics
Black hole X-ray binaries (BH XRBs) launch powerful relativistic jets during bright outburst phases. The properties of these outflows change dramatically between different spectral-accretion states. Compact jets are observed during the hard state and are
Carotenuto F., Zhang L., Altamirano D., Casella P., Corbel S., Miller-Jones J. C. A.   +5 more
doaj   +1 more source

Relativistic Jet Motion in the Radio-quiet LINER Galaxy KISSR 872

The Astrophysical Journal
We report superluminal jet motion with an apparent speed of β _app = 1.65 ± 0.57 in the radio-quiet (RQ) low-ionization nuclear emission-line region (LINER) galaxy KISSR 872.
Preeti Kharb, Eric G. Blackman, Eric Clausen-Brown, Mousumi Das, Daniel A. Schwartz, Aneta Siemiginowska, Smitha Subramanian, Sravani Vaddi   +7 more
doaj   +1 more source

Powering AGNs with super-critical black holes

, 2009
We propose a novel mechanism for powering the central engines of Active Galactic Nuclei through super-critical (type II) black hole collapse. In this picture, ~$10^3 M_\odot$ of material collapsing at relativistic speeds can trigger a gravitational shock,
Alvarez-Gaume, L., Avgoustidis, A., Jimenez, R., Vazquez-Mozo, M. A.   +3 more
core  

A Lorentz variant theory that passes fundamental tests of special relativity and makes diverging, testable but as of yet untested predictions. [PDF]

F1000Res, 2023
Bischoff van Heemskerck D.
europepmc   +1 more source

Multiple Emission Regions in Jets of the Low-Luminosity Active Galactic Nucleus in NGC 4278

The Astrophysical Journal
The Large High Altitude Air Shower Observatory (LHAASO) has detected very-high-energy gamma rays from the low-ionization nuclear emission-line region galaxy NGC 4278, which has a low-luminosity active galactic nucleus (LLAGN) and symmetric, mildly ...
Samik Dutta, Nayantara Gupta
doaj   +1 more source