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Autor:
Kempski, Philipp, Li, Dongzi, Fielding, Drummond B., Quataert, Eliot, Phinney, E. Sterl, Kunz, Matthew W., Jow, Dylan L., Philippov, Alexander A.
Intermittent magnetic structures are a plausible candidate for explaining cosmic-ray (CR) diffusion rates derived from observed CR energy spectra. Independently, studies of extreme scattering events (ESEs) of radio quasars and pulsar scintillation ha
Externí odkaz:
http://arxiv.org/abs/2412.03649
We report on the first self-consistent multidimensional particle-in-cell numerical simulations of non-homogeneous pair discharges in polar caps of rotation-powered pulsars. By introducing strong inhomogeneities in the initial plasma distribution in o
Externí odkaz:
http://arxiv.org/abs/2409.15409
Autor:
Galishnikova, Alisa, Philippov, Alexander, Quataert, Eliot, Chatterjee, Koushik, Liska, Matthew
We study spherical accretion of magnetized plasma with low angular momentum onto a supermassive black hole, utilizing global General Relativistic Magnetohydrodynamic simulations. Black hole-driven feedback in the form of magnetic eruptions and jets t
Externí odkaz:
http://arxiv.org/abs/2409.11486
Autor:
Meyer, Eileen T., Laha, Sibasish, Shuvo, Onic I., Roychowdhury, Agniva, Green, David A., Rhodes, Lauren, Hankla, Amelia M., Philippov, Alexander, Mbarek, Rostom, laor, Ari, Begelman, Mitchell C., Sadaula, Dev R., Ghosh, Ritesh, Bruni, Gabriele, Panessa, Francesca, Guainazzi, Matteo, Behar, Ehud, Masterson, Megan, Zhang, Haocheng, Yang, Xiaolong, Gurwell, Mark A., Keating, Garrett K., Williams-Baldwin, David, Bray, Justin D., Bempong-Manful, Emmanuel K., Wrigley, Nicholas, Bianchi, Stefano, Ricci, Federica, La Franca, Fabio, Kara, Erin, Georganopoulos, Markos, Oates, Samantha, Nicholl, Matt, Pal, Main, Cenko, S. Bradley
We present multi-frequency (5-345 GHz) and multi-resolution radio observations of 1ES 1927+654, widely considered one of the most unusual and extreme changing-look active galactic nuclei (CL-AGN). The source was first designated a CL-AGN after an opt
Externí odkaz:
http://arxiv.org/abs/2406.18061
NICER has observed a few millisecond pulsars where the geometry of the X-ray emitting hotspots on the neutron star is analyzed in order to constrain the mass and radius from X-ray light curve modeling. One example, PSR J0030+0451, is shown to possibl
Externí odkaz:
http://arxiv.org/abs/2402.11474
Electromagnetic fundamental and harmonic emission is ubiquitously observed throughout the heliosphere, and in particular it is commonly associated with the occurrence of Type II and III solar radio bursts. Classical analytic calculations for the plas
Externí odkaz:
http://arxiv.org/abs/2402.11011
Non-relativistic axions can be efficiently produced in in the polar caps of pulsars, resulting in the formation of a dense cloud of gravitationally bound axions. Here, we investigate the interplay between such an axion cloud and the electrodynamics i
Externí odkaz:
http://arxiv.org/abs/2311.14795
Autor:
Gustavo Pessoa, Vadim Ponkratov, David Philippov, Olga Shvyreva, Nikolay Kuznetsov, Izabella Elyakova, Elena Mikhina, Natalya Kotova, Andrey Pozdnyaev, Akmal Durmanov, Tatiana Bloshenko
Publikováno v:
Emerging Science Journal, Vol 8, Iss 6, Pp 2385-2403 (2024)
Energy prices and the stock market are two of the crucial factors in the evolving landscape of global finance, particularly in major emerging economies. However, research on how energy price changes impact stock markets in BRIC countries remains limi
Externí odkaz:
https://doaj.org/article/f1b9df95e6d547a4977ef3defe1e035b
Autor:
Mbarek, Rostom, Philippov, Alexander, Chernoglazov, Alexander, Levinson, Amir, Mushotzky, Richard
Publikováno v:
Phys. Rev. D 109, L101306 Published 24 May 2024
We examine properties of accelerated protons potentially responsible for the neutrino excess observed in the direction of NGC 1068, using constraints from kinetic Particle-in-Cell (PIC) simulations. We find that i) coronal X-rays and Optical/Ultra-Vi
Externí odkaz:
http://arxiv.org/abs/2310.15222