6 papers
Time-resolved leptonic modeling of the prompt emission of GRB 211211A
Maria Petropoulou, Maria Gkoni, Konstantinos Xyloportas +3
The paper models the time‑resolved prompt emission of GRB 211211A using a leptonic radiation framework to infer the physical conditions of the emitting region and predict detectabl…
Delayed Radio Flares in Neutrino-associated Blazars: The Case of TXS 0506+056
S. I. Stathopoulos, C. Yuan, G. Vasilopoulos +4
Radio flares have been postulated to be associated with the production of astrophysical neutrinos. For example, TXS 0506+056 exhibits a 2-3 yr delay between the 2017 IceCube-170922…
Black-hole mass estimation through accretion disk spectral fitting for high-redshift blazars
G. Kyriopoulos, M. Petropoulou, G. Vasilopoulos +1
High-redshift () blazars, with relativistic jets aligned toward us, probe the most powerful end of the active galactic nuclei (AGN) population. We aim at determining the black…
The Advanced X-ray Imaging Satellite (AXIS) Community Science Book
Michael Koss, Nafisa Aftab, Steven W. Allen +395
The AXIS Community Science Book represents the collective effort of 592 scientists worldwide to define the transformative science enabled by the Advanced X-ray Imaging Satellite (A…
Particle acceleration and multi-messenger radiation from Ultra-Luminous X-ray Sources: A new class of Galactic PeVatrons
Enrico Peretti, Maria Petropoulou, Georgios Vasilopoulos +1
Super-Eddington accretion onto stellar-mass compact objects powers fast outflows in ultra-luminous X-ray sources (ULXs). Such outflows, which can reach mildly relativistic velociti…
Accelerating SED Modeling of Astrophysical Objects Using Neural Networks
Federico Testagrossa, Georgios Vasilopoulos, Despina Karavola +4
Interpreting the spectral energy distributions (SEDs) of astrophysical objects with physically motivated models is computationally expensive. These models require solving coupled d…