Now showing items 11-20 of 913
A HARD AND VARIABLE X-RAY EMISSION FROM THE MASSIVE EMISSION-LINE STAR HD 157832
(IOP PUBLISHING LTD, 2011)
We report the discovery with XMM-Newton of a hard-thermal (T similar to 130 MK) and variable X-ray emission from the Be star HD 157832, a new member of the puzzling class of gamma-Cas-like Be/X-ray systems. Recent optical ...
Symbiotic stars in X-rays
(Edp Sciences S A, 2012-11-27)
Until recently, symbiotic binary systems in which a white dwarf accretes from a red giant were thought to be mainly a soft X-ray population. Here we describe the detection with the X-ray Telescope (XRT) on the Swift satellite ...
Dense plasma focus PACO as a hard X-ray emitter: a study on the radiation source
(IOP Publishing, 2014-06)
The radiation in the X-ray range detected outside the vacuum chamber of the dense plasma focus (DPF) PACO, are produced on the anode zone. The zone of emission is studied in a shot-to-shot analysis, using pure deuterium ...
THE VARIABLE HARD X-RAY EMISSION OF NGC 4945 AS OBSERVED BY NUSTAR
(UNIVERSITY OF CHICAGO PRESS, 2014)
Effects of Plasma Immersion Ion Implantation (PIII) of nitrogen on hardness, composition and corrosion resistance of Ti-6Al-4V alloy
Ti-6Al-4V samples have been treated by PHI processing at different temperatures (400-800°C), treatment time (30-150 min) and plasma potential (100 and 420 V). Hardness measurements results showed an enhancement of the ...