16 citations · 34 across the 9 of their papers we have counts for
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The unidentified PeV source LHAASO J2108+5157: A microquasar remnant?
Josep Mart\'ı, Pedro L. Luque-Escamilla, Leandro Abaroa +4
Context. LHAASO~J2108+5157 is one of the most intriguing Galactic ultra-high-energy -ray sources. It is detected up to hundreds of TeV but lacks a clear counterpart at lower fre…
A Galactic microblazar as a potential accelerator of ultra-high-energy particles
Josep Martí, Pedro L. Luque-Escamilla, Benito Marcote +10
Context. Persistent jets from X-ray binaries which are aligned very close to the line of sight could be considered to be Galactic equivalents of blazars, or 'microblazars'. They ar…
Broadband emission of microquasar remnants
Leandro Abaroa, Gustavo E. Romero, Valentí Bosch-Ramon
Microquasar remnants (MQRs), the long-lived cocoons inflated by extinct microquasar jets, have recently been proposed as hidden Galactic PeVatrons capable of producing ultra-high-e…
Microquasar remnants as reservoirs of PeV cosmic rays
Leandro Abaroa, Gustavo E. Romero, Valentí Bosch-Ramón
The Large High Altitude Air Shower Observatory (LHAASO) has revealed a population of Galactic gamma-ray sources radiating beyond 100 TeV, but the nature of several of them is still…
Microquasar remnants as hidden PeVatrons
Leandro Abaroa, Gustavo E. Romero, Valentí Bosch-Ramon
The Large High Altitude Air Shower Observatory (LHAASO) has revealed numerous ultrahigh-energy gamma-ray sources of unknown origin. We propose that a fraction of them can be explai…
Effects of Bethe-Heitler pair production in ultraluminous X-ray sources
Gustavo Esteban Romero, Lucas Manuel Pasquevich, Leandro Abaroa
Some black holes in X-ray binaries accrete at rates far above the Eddington limit. In this supercritical regime, photons are trapped in a radiation-dominated, geometrically thick d…
The remarkable microquasar S26: a super-Eddington PeVatron?
Leandro Abaroa, Gustavo E. Romero, Giulio C. Mancuso +1
Context. S26 is an extragalactic microquasar with the most powerful jets ever discovered. They have a kinetic luminosity of . This…
Electromagnetic signatures of black hole clusters in the center of super-Eddington galaxies
Leandro Abaroa, Gustavo E. Romero
Supermassive black holes (SMBHs) at the centers of active galaxies are fed by accretion disks that radiate from the infrared or optical to the X-ray bands. Several types of objects…
XMM-Newton observations of the extragalactic microquasar S26 and their implications for PeV cosmic rays
L. Abaroa, G. E. Romero, G. C. Mancuso +1
The extragalactic microquasar S26 has the most powerful jets observed in accreting binaries, with a kinetic luminosity of . According to…
Simultaneous NICER and NuSTAR observations of the Ultraluminous source NGC 4190 ULX-1
Jorge A. Combi, Federico A. Fogantini, Enzo A. Saavedra +6
We present an X-ray analysis of three different XMM-Newton observations together with simultaneous NICER and NuSTAR observations of the ultraluminous X-ray source NGC 4190 ULX-1. O…
Super Winds and Radio Emission in X-ray Binary Systems
L. Abaroa, G. E. Romero
We have recently proposed that supercritical colliding wind binaries (SCWBs) are suitable scenarios for particle acceleration and nonthermal radiation. In these X-ray binary system…
Supercritical colliding wind binaries
L. Abaroa, G. E. Romero, P. Sotomayor
Context. Particle-accelerating colliding-wind binaries (PACWBs) are systems that are formed by two massive and hot stars and produce nonthermal (NT) radiation. The key elements of…