Kinetic Simulations of Instabilities and Particle Acceleration in Cylindrical Magnetized Relativistic Jets

The Astrophysical Journal American Astronomical Society 931:2 (2022) 137-137

Authors:

José Ortuño-Macías, Krzysztof Nalewajko, Dmitri A Uzdensky, Mitchell C Begelman, Gregory R Werner, Alexander Y Chen, Bhupendra Mishra

Abstract:

Abstract Relativistic magnetized jets, such as those from AGN, GRBs, and XRBs, are susceptible to current- and pressure-driven MHD instabilities that can lead to particle acceleration and nonthermal radiation. Here, we investigate the development of these instabilities through 3D kinetic simulations of cylindrically symmetric equilibria involving toroidal magnetic fields with electron–positron pair plasma. Generalizing recent treatments by Alves et al. and Davelaar et al., we consider a range of initial structures in which the force due to toroidal magnetic field is balanced by a combination of forces due to axial magnetic field and gas pressure. We argue that the particle energy limit identified by Alves et al. is due to the finite duration of the fast magnetic dissipation phase. We find a rather minor role of electric fields parallel to the local magnetic fields in particle acceleration. In all investigated cases, a kink mode arises in the central core region with a growth timescale consistent with the predictions of linearized MHD models. In the case of a gas-pressure-balanced (Z-pinch) profile, we identify a weak local pinch mode well outside the jet core. We argue that pressure-driven modes are important for relativistic jets, in regions where sufficient gas pressure is produced by other dissipation mechanisms.

Evidence for γ-ray emission from the remnant of Kepler’s supernova based on deep H.E.S.S. observations⋆

Astronomy & Astrophysics EDP Sciences 662 (2022) a65

Authors:

F Aharonian, F Ait Benkhali, EO Angüner, H Ashkar, M Backes, V Barbosa Martins, R Batzofin, Y Becherini, D Berge, K Bernlöhr, M Böttcher, C Boisson, J Bolmont, M de Bony de Lavergne, M Breuhaus, R Brose, F Brun, T Bulik, T Bylund, F Cangemi, S Caroff, S Casanova, M Cerruti, T Chand, A Chen, O Chibueze, G Cotter, P Cristofari, J Damascene Mbarubucyeye, J Devin, A Djannati-Ataï, A Dmytriiev, K Egberts, S Einecke, J-P Ernenwein, K Feijen, A Fiasson, G Fichet de Clairfontaine, G Fontaine, S Funk, S Gabici, YA Gallant, S Ghafourizadeh, G Giavitto, L Giunti, D Glawion, JF Glicenstein, M-H Grondin, M Hörbe, W Hofmann, TL Holch, M Holler, D Horns, Z Huang, M Jamrozy, V Joshi, I Jung-Richardt, E Kasai, K Katarzyński, U Katz, B Khélifi, W Kluźniak, N Komin, K Kosack, D Kostunin, A Lemière, M Lemoine-Goumard, J-P Lenain, F Leuschner, T Lohse, A Luashvili, I Lypova, J Mackey, D Malyshev, D Malyshev, V Marandon, P Marchegiani, A Marcowith, G Martí-Devesa, R Marx, G Maurin, PJ Meintjes, M Meyer, A Mitchell, R Moderski, L Mohrmann, A Montanari, E Moulin, J Muller, K Nakashima, M de Naurois, A Nayerhoda, J Niemiec, A Priyana Noel, P O’Brien, S Ohm, L Olivera-Nieto, E de Ona Wilhelmi, M Ostrowski, S Panny, M Panter, RD Parsons, G Peron, V Poireau, DA Prokhorov, G Pühlhofer, M Punch, A Quirrenbach, P Reichherzer, A Reimer, O Reimer, M Renaud, B Reville, F Rieger, G Rowell, B Rudak, H Rueda Ricarte, V Sahakian, S Sailer, H Salzmann, DA Sanchez, A Santangelo, M Sasaki, J Schäfer, F Schüssler, HM Schutte, U Schwanke, JNS Shapopi, R Simoni, H Sol, A Specovius, S Spencer, Ł Stawarz, S Steinmassl, C Steppa, I Sushch, T Takahashi, T Tanaka, AM Taylor, R Terrier, M Tsirou, Y Uchiyama, T Unbehaun, C van Eldik, J Veh, J Vink, HJ Völk, SJ Wagner, F Werner, R White, A Wierzcholska, YW Wong, A Yusafzai, M Zacharias, D Zargaryan, AA Zdziarski, A Zech, SJ Zhu, S Zouari, N Żywucka

PropPy – Correlated random walk propagation of cosmicrays in magnetic turbulence

The Journal of Open Source Software The Open Journal 7:74 (2022) 4243

Authors:

P Reichherzer, J Becker Tjus

Analytic Modelling of Binary-Single Encounters: Non-Thermal Eccentricity Distribution and Gravitational-Wave Source Formation

ArXiv 2205.15957 (2022)

Authors:

Yonadav Barry Ginat, Hagai Perets

On the self-consistent time-dependent linearized response of stellar discs to external perturbations

(2022)

Authors:

Dominic Dootson, John Magorrian