Results 101 to 110 of about 199,466 (288)
Particle Acceleration by Shocks in Supernova Remnants [PDF]
, 2013 Particle acceleration occurs on a range of scales from AU in the heliosphere to Mpc in clusters of galaxies and to energies ranging from MeV to exaelectronvolt (EeV). A number of acceleration processes have been proposed, but diffusive shock acceleration
A. Bell
semanticscholar +1 more source
The Radio Lifetime of Supernova Remnants and the Distribution of Pulsar Velocities at Birth [PDF]
, 1994 We have made VLA images of the fields around three young pulsars which have resulted in the discovery of two new supernova remnants and confirmation of a third. We argue that, in at least two cases and perhaps the third, the pulsars are physically associated with these supernova remnants.
arxiv +1 more source
Three Supernova Remnants observed by BeppoSAX [PDF]
Nucl.Phys.Proc.Suppl. 69 (1998) 62-67, 1998 We present the results of three observations of shell-type supernova remnants observed by BeppoSAX. Two of the remnants (N132D and Cas A) are oxygen rich supernova remnants. They were observed during the PV phase. SN1006 was observed during A01. For SN1006 we present preliminary results on the abundance measurements based on the emission from the ...
arxiv +1 more source
Acceleration of cosmic rays and gamma-ray emission from supernova remnants in the Galaxy [PDF]
, 2013 Galactic cosmic rays are believed to be accelerated at supernova remnant shocks. Though very popular and robust, this conjecture still needs a conclusive proof.
P. Cristofari +4 more
semanticscholar +1 more source
Photoinduced Hydrogen Evolution Catalyzed by Co(II) Complexes of N5‐Donor Ligands
Chemistry – A European Journal, EarlyView.Cobalt(II) complexes of three related pentadentate ligands have been investigated as photoelectrochemical catalysts for proton reduction/hydrogen gas evolution in the presence of ruthenium, iridium, or copper‐based photosensitizers. Potential mechanisms for hydrogen evolution have been investigated by time‐resolved transient absorption spectroscopy and
Chuanshuai Li +14 more
wiley +1 more source
A new numerical code for hydrodynamical 3D simulations of supernova remnants [PDF]
Serbian Astronomical Journal, 2019 We develop a 3D hydrodynamical code written in C programming language to study the expansion of supernova remnants (SNRs) in the surrounding medium. It is based on the MUSCL-Hancock finite volume scheme with the HLLC Riemann solver.
Kostić P.
doaj +1 more source
Circumstellar Nebulae in Young Supernova Remnants [PDF]
, 2000 Supernovae descendent from massive stars explode in media that have been modified by their progenitors' mass loss and UV radiation. The supernova ejecta will first interact with the circumstellar material shed by the progenitors at late evolutionary stages, and then interact with the interstellar material.
arxiv +1 more source
The Distribution of Supernova Remnants in the Galaxy [PDF]
International Astronomical Union Colloquium, 1991 Observational selection effects and the lack of accurate distances for most Galactic SNRs pose problems for studies of the distribution of SNRs in the Galaxy. However, by comparing the observed Galactic longitude distribution of high surface brightness SNRs with that expected from simple models — which avoids some of the problems with selection effects
openaire +4 more sources
Cosmic ray acceleration in young supernova remnants [PDF]
, 2013 We investigate the appearance of magnetic field amplification resulting from a cosmic ray escape current in the context of supernova remnant shock waves. The current is inversely proportional to the maximum energy of cosmic rays, and is a strong function
K. Schure, A. Bell
semanticscholar +1 more source
OXIDATION‐DEFORMYLATION CASCADE CATALYZED BY A MONONUCLEAR COPPER COMPLEX
Chemistry – A European Journal, Accepted Article.In this study, two copper complexes were synthesized using N3 (arising from two pyridines and one amide group) containing ligands N‐(2‐picolyl)picolinamide (L1H) and bis(2‐pyridylcarbonyl)amine (L2H), forming [(L1)CuII(OH2)(NO3)] (1) and [(L2)CuII(OH2)2](NO3) (2).
Yongxing Wang +8 more
wiley +1 more source