234 citations · 311 across the 7 of their papers we have counts for
7 papers
Evidence for a New Class of Extreme UV Sources
Dan Maoz, Eran Ofek, Amotz Shemi
Most of the sources detected in the extreme ultraviolet (EUV; 100 Ang to 600 Ang) by the Rosat WFC and EUVE all-sky surveys have been identified with active late-type stars and hot…
Optical Identification of Quasar 0917+7122 in the Direction of an Extreme-Ultraviolet Source
Dan Maoz, Eran Ofek, Amotz Shemi +6
We report the optical identification of an mag, quasar at the position of a 6 cm radio source and a faint \rosat PSPC X-ray source. The quasar lies within the er…
Are Unidentified EUV Sources the Closest Neutron Stars?
Amotz Shemi
Unidentified extreme UV sources, detected in the {\it EUVE} and {\it ROSAT} WFC all-sky surveys, could be isolated old neutron stars, accreting material from the ISM. The closest n…
COSMIC RAYS FROM ACCRETING ISOLATED NEUTRON STARS
Amotz Shemi
Interstellar matter that is accreted onto isolated magnetic neutron stars in the Galaxy ( by number) is accelerated and reflected back by MHD shocks, which envelope the…
Gamma Ray Bursts from Interaction of Relativistic Flows with Radiation Fields
Amotz Shemi
Relativistic flows resulting from sudden explosive events upscatter ambient interstellar photons of local radiation fields. For Lorentz factor and dense optical - UV radia…
Hydrodynamics of Relativistic Fireballs
Tsvi Piran, Amotz Shemi, Ramesh Narayan
We examine analytically and numerically the evolution of a relativistic fireball. We show that, after an early rearrangement phase, most of the matter and energy in the fireball is…
Fireballs in the Galactic Halo and -Ray Bursts
Tsvi Piran, Amotz Shemi
If gamma ray burst sources are in the galactic halo they inevitably involve a creation of an opaque pair plasma fireball, just like in cosmological sources. We find that the typica…