47 citations · 231 across the 23 of their papers we have counts for
23 papers
Iron K signatures from accretion disks around fermionic dark matter cores
V. Crespi, F. L. Vieyro, C. R. Argüelles +1
The fluorescent iron line and its broadening due to relativistic effects are excellent probes to study the inner part of an accretion disk and the space-time geometry near the comp…
Black holes in a bouncing universe
Iara Pintos, Daniela Pérez, Florencia L. Vieyro
Bouncing cosmologies offer an alternative to the standard CDM model by avoiding the problem of the initial cosmological singularity by construction. In these models, the univers…
The faint voice of a radio-weak BL Lacertae: modeling the broadband emission of WISE~J141046.00+740511.2
A. M. Carulli, F. L. Vieyro, M. M. Reynoso +2
The WISE source, J141046.00+740511.2, has been recently observed from radio to rays. Although the optical spectrum is consistent with a BL Lacertae (BL Lac) object, the source…
Probing the detectability of electromagnetic signatures from Galactic isolated black holes
Javier Rodrigo Martinez, Valenti Bosch-Ramon, Florencia Laura Vieyro +1
Context: A large number of isolated black holes (IBHs) are expected to populate the Galaxy. However, only one has been confirmed by the analysis of a microlensing event, and no con…
Imaging fermionic dark matter cores at the center of galaxies
Joaquin Pelle, Carlos R. Argüelles, Florencia L. Vieyro +5
Current images of the supermassive black hole (SMBH) candidates at the center of our Galaxy and M87 have opened an unprecedented era for studying strong gravity and the nature of r…
Accretion discs onto supermassive compact objects: a portal to dark matter physics in active galaxies
C. Millauro, C. R. Argüelles, F. L. Vieyro +2
The study of the physics of accretion discs developed around the supermassive black hole (BH) candidates are essential theoretical tools to test their nature. Here, we study the ac…
Disentangling the nature of the prototype radio weak BL Lac: Contemporaneous multifrequency observations of WISE J141046.00 + 740511.2
E. J. Marchesini, V. Reynaldi, F. Vieyro +13
Context. The gamma-ray emitting source WISE J141046.00+740511.2 has been associated with a Fermi-LAT detection by crossmatching with Swift/XRT data. It has shown all the canonical…
Nonthermal processes in hot accretion flows onto supermassive black holes: An inhomogeneous model
Eduardo M. Gutiérrez, Florencia L. Vieyro, Gustavo E. Romero
Context. Many low-redshift active galactic nuclei harbor a supermassive black hole accreting matter at low or medium rates. At such rates, the accretion flow usually consists of a…
Cosmic rays from the nearby starburst galaxy NGC 253: the effect of a low luminosity active galactic nucleus
Eduardo M. Gutiérrez, Gustavo E. Romero, Florencia L. Vieyro
NGC 253 is a nearby starburst galaxy in the Sculptor group located at a distance of 3.5 Mpc that has been suggested by some authors as a potential site for cosmic-ray acceleration…
Non-thermal emission resulting from a supernova explosion inside an extragalactic jet
F. L. Vieyro, V. Bosch-Ramon, N. Torres-Albà
Core-collapse supernovae are found in galaxies with ongoing star-formation. In a starburst galaxy hosting an active galactic nucleus with a relativistic jet, supernovae can take pl…
Primordial black hole evolution in two-fluid cosmology
Eduardo M. Gutiérrez, Florencia L. Vieyro, Gustavo E. Romero
Several processes in the early universe might lead to the formation of primordial black holes with different masses. These black holes would interact with the cosmic plasma through…
A model for the repeating FRB 121102 in the AGN scenario
Florencia L. Vieyro, Gustavo E. Romero, Valentí Bosch-Ramon +2
Fast radio bursts, or FRBs, are transient sources of unknown origin. Recent radio and optical observations have provided strong evidence for an extragalactic origin of the phenomen…
Collective non-thermal emission from an extragalactic jet interacting with stars
Florencia L. Vieyro, Núria Torres-Albà, Valentí Bosch-Ramon
The central regions of galaxies are complex environments, rich in evolved and/or massive stars. For galaxies hosting an active galactic nucleus (AGN) with jets, the interaction of…
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…
Neutrinos from collapsars
Florencia L. Vieyro, Gustavo E. Romero, Orlando L. G. Peres
Long gamma-ray bursts (GRBs) are associated with the gravitational collapse of very massive stars. The central engine of a GRB can collimate relativistic jets that propagate inside…
Gravitational Lensing of Neutrino from Collapsars
Florencia L. Vieyro, Gustavo E. Romero
We study neutrino emission from long gamma-ray bursts. The collapse of very massive stars to black holes, and the consequent jet formation, are expected to produce high-energy neut…
Episodic gamma-ray and neutrino emission from the low mass X-ray binary GRO J0422+32
Florencia L. Vieyro, Yolanda Sestayo, Gustavo E. Romero +1
GRO J0422+32 is a member of the class of low-mass X-ray binary (LMXB) sources, discovered during an outburst in 1992. Along the entire episode ( days) a persistent power-…
Nonthermal processes and neutrino emission from the black hole GRO J0422+32 in a bursting state
F. L. Vieyro, Y. Sestayo, G. E. Romero +1
GRO J0422+32 is a member of the class of low-mass X-ray binaries (LMXBs). It was discovered during an outburst in 1992. During the entire episode a persistent power-law spectral co…
Particle transport in magnetized media around black holes and associated radiation
Florencia L. Vieyro, Gustavo E. Romero
Galactic black hole coronae are composed of a hot, magnetized plasma. The spectral energy distribution produced in this component of X-ray binaries can be strongly affected by diff…
Neutrino flares from black hole coronae
Florencia L. Vieyro, Gustavo E. Romero
We present a model for neutrino flares in accreting black holes based on the injection of a non-thermal population of relativistic particles in a magnetized corona. The most import…
Gamma-ray flares from black hole coronae
Gustavo E. Romero, Florencia L. Vieyro
We present results of a study of non-thermal, time-dependent particle injection in a corona around an accreting black hole. We model the spectral energy distribution of high-energy…
Non-thermal radiation from Cygnus X-1 corona
F. L. Vieyro, G. E. Romero, G. S. Vila
Cygnus X-1 was the first X-ray source widely accepted to be a black hole candidate and remains among the most studied astronomical objects in its class. The detection of non-therma…