Zobrazeno 1 - 10
of 135
pro vyhledávání: '"Amir Levinson"'
Publikováno v:
The Astrophysical Journal Letters, Vol 972, Iss 1, p L4 (2024)
We present the first numerical study of gravitational waves (GWs) from collapsar disks, using state-of-the-art 3D general relativistic magnetohydrodynamic simulations of collapsing stars. These simulations incorporate a fixed Kerr metric for the cent
Externí odkaz:
https://doaj.org/article/2d37a7ef95394f999aedbe7807a805b1
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 1, p 78 (2024)
In the absence of a sufficient amount of plasma injection into the black hole (BH) magnetosphere, the force-free state of the magnetosphere cannot be maintained, leading to the emergence of strong, time-dependent, longitudinal electric fields (i.e.,
Externí odkaz:
https://doaj.org/article/74558c655b4c4996a1ba131e6189395a
Autor:
Frank M. Rieger, Amir Levinson
Publikováno v:
Galaxies, Vol 6, Iss 4, p 116 (2018)
Radio Galaxies have by now emerged as a new γ-ray emitting source class on the extragalactic sky. Given their remarkable observed characteristics, such as unusual gamma-ray spectra or ultrafast VHE variability, they represent unique examples to prob
Externí odkaz:
https://doaj.org/article/f9f381b0b3794c8687182010ab2acbbd
In this decade, the transient universe will be mapped out in great detail by the emerging wide-field multiwavelength surveys, and neutrino and gravitational-wave detectors, promising to probe the astronomical and physical origin of the most extreme r
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Gamma-ray bursts (GRBs) are powered by relativistic jets that exhibit intermittency over a broad range of time-scales – from ∼ ms to seconds. Previous numerical studies have shown that hydrodynamic (i.e. unmagnetized) jets that are expelled from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1264a2e543457c9051fbc67c92bf4abe
https://doi.org/10.1093/mnras/stab1068
https://doi.org/10.1093/mnras/stab1068
Electromagnetic fireworks: Fast radio bursts from rapid reconnection in the compressed magnetar wind
One scenario for the generation of fast radio bursts (FRBs) is magnetic reconnection in a current sheet of the magnetar wind. Compressed by a strong magnetic pulse induced by a magnetar flare, the current sheet fragments into a self-similar chain of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b56ef5cc55d26a4a876f25d902a7c68b
http://arxiv.org/abs/2203.04320
http://arxiv.org/abs/2203.04320
Autor:
Amir Levinson, Ehud Nakar
Publikováno v:
Physics Reports
The first electromagnetic signal observed in different types of cosmic explosions is released upon emergence of a shock created in the explosion from the opaque envelope enshrouding the central source. Notable examples are the early emission from var
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fcafe1bb8653d697dec5114b2173d210
https://doi.org/10.1016/j.physrep.2020.04.003
https://doi.org/10.1016/j.physrep.2020.04.003
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 494:4203-4225
Black hole - accretion disc systems are the central engines of relativistic jets from stellar to galactic scales. We numerically quantify the unsteady outgoing Poynting flux through the horizon of a rapidly spinning black hole endowed with a rotating
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a5917c3ad08ca84bb9cac37804b04823
https://doi.org/10.1093/mnras/staa943
https://doi.org/10.1093/mnras/staa943
Autor:
Amir Levinson, Ehud Nakar, Arno Vanthieghem, Jens Florian Mahlmann, Alexander Philippov, Frederico Fiuza
The radiation drag in photon-rich environments of cosmic explosions can seed kinetic instabilities by inducing velocity spreads between relativistically streaming plasma components. Such microturbulence is likely imprinted on the breakout signals of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::225bd8e68d0d14f05007171ce082d1ce
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 491:4325-4333
Blue-shifted Broad Absorption Lines (BALs) detected in quasar's spectra are indicative of AGN outflows. We show, using 2D hydrodynamical simulations, that disruption of interstellar clouds by a fast AGN wind can lead to formation of cold, dense high
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::547f34bd3b587b98f9c643bcf3e2e34b
https://doi.org/10.1093/mnras/stz3352
https://doi.org/10.1093/mnras/stz3352