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Gravitational lensing as a possible explanation for some unidentified gamma-ray sources at high latitudes
Diego F. Torres, Gustavo E. Romero, Ernesto F. Eiroa
We propose that some of the high-latitude unidentified EGRET gamma-ray sources could be the result of gravitational lensing amplification of the innermost regions of distant, faint…
Is the Supernova Remnant RX J1713.7-3946 a Hadronic Cosmic Ray Accelerator ?
Yousaf M. Butt, Diego F. Torres, Jorge A. Combi +2
The non-thermal supernova remnant RX J1713.7-3946 (G347.3-0.5) has recently been shown to be a site of cosmic ray (CR) electron acceleration to TeV energies (Muraishi et al. 2000).…
On the possibility of an astronomical detection of chromaticity effects in microlensing by wormhole-like objects
Diego F. Torres, Ernesto F. Eiroa, Gustavo E. Romero
We study the colour changes induced by blending in a wormhole-like microlensing scenario with extended sources. The results are compared with those obtained for limb darkening. We…
Variable gamma-ray emission from the Be/X-ray transient A0535+26?
Gustavo E. Romero, M. M. Kaufman Bernado, Jorge A. Combi +1
We present a study of the unidentified gamma-ray source 3EG J0542+2610. This source is spatially superposed to the supernova remnant G180.0-1.7, but its time variability makes unli…
Self-existing objects and auto-generated information in chronology-violating space-times: A philosophical discussion
Gustavo E. Romero, Diego F. Torres
Closed time-like curves naturally appear in a variety of chronology-violating space-times. In these space-times, the Principle of Self-Consistency demands an harmony between local…
The Mysterious Ultrahigh Energy Cosmic Ray Clustering
Luis A. Anchordoqui, Haim Goldberg, Stephen Reucroft +3
We examine the correlation between compact radio quasars (redshifts in the range ) and the arrival direction of ultrahigh energy cosmic rays forming clusters. Our Mo…