8 papers
Testing the Spacetime Geometry of Sgr A* with the Relativistic Orbit of S2 star
Parth Bambhaniya, Preet Dalal, Giovani H. Vicentin +3
In this work, we perform a relativistic test of the spacetime geometry of Sagittarius A* (Sgr A*) using the orbit of the S2 star. We consider a broad class of compact object models…
A Turbulence-Driven Magnetic Reconnection Model for the High-Energy Neutrino Emission from NGC 1068
Luana Passos-Reis, Elisabete M. de Gouveia Dal Pino, Juan C. RodrÃguez-RamÃrez +1
We model the Seyfert II AGN NGC 1068 within a turbulence-induced magnetic reconnection framework to explain its high-energy emission. Observations reveal a neutrino flux excess hig…
Do plasmoids induce fast magnetic reconnection in well-resolved current sheets in 2D MHD simulations?
G. H. Vicentin, G. Kowal, E. M. de Gouveia Dal Pino +1
We investigate the development of tearing-mode instability using the highest-resolution two-dimensional magnetohydrodynamic simulations of reconnecting current sheets performed on…
High-Energy Neutrino Emission in NGC1068 driven by Turbulent Magnetic Reconnection
Luana Passos-Reis, Elisabete M. de Gouveia Dal Pino, Juan C. RodrÃguez-RamÃrez +1
Astrophysical neutrinos from Active Galactic Nuclei (AGN) offer a unique window into high-energy particle acceleration in obscured environments. The nearby Type II Seyfert galaxy N…
Is plasmoid-mediated reconnection really important in accretion flows to drive flares in AGNs?
Giovani H. Vicentin, Elisabete M. de Gouveia Dal Pino, George N. Wong +4
Based on very high-resolution resistive 2D and 3D magnetohydrodynamical (MHD) simulations of current sheets, our findings suggest that the answer to this question is likely no. In…
Cosmic Ray Acceleration by Turbulence-Driven Magnetic Reconnection and the Origin of the Neutrinos in NGC 1068
Luana Passos-Reis, Elisabete M. de Gouveia Dal Pino, Juan Carlos RodrÃguez-RamÃrez +1
The Seyfert Type II galaxy NGC 1068 has been identified as a potential neutrino source by IceCube, with a 4.2 significance detection of a 79 neutrino excess from…