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A model for the polarization of the high-energy radiation from accreting black holes: the case of XTE J1118+480
Florencia L. Vieyro, Gustavo E. Romero, Sylvain Chaty
The high-energy emission ( keV MeV) of Cygnus X-1 --the most well-studied Galactic black hole-- was recently found to be strongly polarized. The origin of this radiation…
A mechanism for fast radio bursts
Gustavo E. Romero, Maria Victoria del Valle, Florencia L. Vieyro
Fast radio bursts are mysterious transient sources likely located at cosmological distances. The derived brightness temperatures exceed by many orders of magnitude the self-absorpt…
On the ontology of spacetime
Gustavo E. Romero
I present a discussion of some issues in the ontology of spacetime. After a characterisation of the controversies among relationists, substantivalists, eternalists, and presentists…
Lepto-hadronic model for the broadband emission of Cygnus X-1
Carolina Pepe, Gabriela S. Vila, Gustavo E. Romero
Cygnus X-1 is a well observed microquasar. Broadband observations at all wavelengths have been collected over the years. The origin of the MeV tail observed with COMPTEL and INTEGR…
Cosmological black holes and the direction of time
Gustavo E. Romero, Daniela Pérez, Federico G. Lopez Armengol
Macroscopic irreversible processes emerge from fundamental physical laws of reversible character. The source of the local irreversibility seems to be not in the laws themselves but…
Real-time evolution of a large-scale relativistic jet
Josep Martí, Pedro L. Luque-Escamilla, Gustavo E. Romero +2
Context. Astrophysical jets are ubiquitous in the Universe on all scales, but their large-scale dynamics and evolution in time are hard to observe since they usually develop at a v…