902 citations · 5.7k across the 204 of their papers we have counts for
9 papers · 2 filters
The binary black hole scenario for the BL Lacertae object AO 0235+16
G. E. Romero, J. H. Fan, S. E. Nuza
Recent analysis of the long term radio lightcurve of the extremely variable BL Lacertae object AO 0235+16 by Raiteri et al. (2001) have revealed the presence of recurrent outbursts…
High-energy gamma-rays from stellar associations
Diego F. Torres, Eva Domingo-Santamaria, Gustavo E. Romero
It is proposed that TeV gamma-rays and neutrinos can be produced by cosmic rays (CRs) through hadronic interactions in the innermost parts of the winds of massive O and B stars. Co…
Hadronic gamma-ray emission from windy microquasars
Gustavo E. Romero, Diego F. Torres, M. M. Kaufman Bernado +1
The jets of microquasars with high-mass stellar companions are exposed to the dense matter field of the stellar wind. We present estimates of the gamma-ray emission expected from t…
Testing the binary black hole paradigm through the Fe Kalpha line profile: application to 3C 273
Diego F. Torres, Gustavo E. Romero, Xavier Barcons +1
We propose the study of long-term variations in the Fe Kalpha line profile as a discriminator for binary black hole (BH) systems. The existence of a binary BH in the center of an a…
Microvariability in the optical polarization of 3C279
I. Andruchow, S. A. Cellone, G. E. Romero +2
We present results of a microvariability polarization study in the violently variable quasar 3C279. We have resolved the polarization curves in the V band for this object down to t…
Signatures of hadronic cosmic rays in starbursts? High-energy photons and neutrinos from NGC253
Gustavo E. Romero, Diego F. Torres
We show that it appears possible for starburst galaxies, like the nearby NGC 253, recently identified as a TeV source by the CANGAROO collaboration, to emit a significant amount of…
High-Mass Microblazars Associated with Variable Gamma-Ray Sources?
M. M. Kaufman Bernado, G. E. Romero, I. F. Mirabel
A model to explain variable gamma-ray sources with high-mass microblazars is described. Inverse Compton interactions between the jet of a microquasar and the UV-photon field of the…
ULXs, Microblazars, and the Unidentified EGRET sources
Yousaf M. Butt, Gustavo E. Romero, Diego F. Torres
We suggest that ultraluminous X-ray sources (ULXs) and some of the variable low latitude EGRET gamma-ray sources may be two different manifestations of the same underlying phenomen…
Did Egret Detect Distant Supernova Remnants?
Diego F. Torres, Gustavo E. Romero, Thomas M. Dame +2
It might be thought that supernova remnants (SNRs) more distant than a few kiloparsec from Earth could not have been detected by the EGRET experiment. This work analyzes the observ…