Results 101 to 110 of about 11,249 (249)
IceCube Search for High-energy Neutrino Emission from TeV Pulsar Wind Nebulae [PDF]
Pulsar wind nebulae (PWNe) are the main gamma-ray emitters in the Galactic plane. They are diffuse nebulae that emit nonthermal radiation. Pulsar winds, relativistic magnetized outflows from the central star, shocked in the ambient medium produce a ...
M. Aartsen+362 more
semanticscholar +1 more source
Solution to the sigma problem of pulsar wind nebulae [PDF]
Abstract We present first results of 3D relativistic magnetohydrodynamical simulations of pulsar wind nebulae. They show that the kink instability and magnetic dissipation inside these nebulae may be the key processes allowing them to reconcile their observations with the theory of pulsar winds. In particular, the size of the termination
Rony Keppens+3 more
openaire +4 more sources
Multiband Nonthermal Radiative Study of PeVatron Candidate Pulsar Wind Nebula HESS J1849-000
Pulsar wind nebula HESS J1849-000 is one of the sources that may emit PeV γ -ray photons based on the recent measurement by the Tibet Air Shower Array and the Large High Altitude Air Shower Observatory.
Bo-Tao Zhu, Fang-Wu Lu, Li Zhang
doaj +1 more source
Resolving the Bow Shock and Tail of the Cannonball Pulsar PSR J0002+6216
We present X-ray and radio observations of the recently discovered bow-shock pulsar wind nebula (PWN) associated with PSR J0002+6216, characterizing the PWN morphology, which was unresolved in previous studies.
P. Kumar+6 more
doaj +1 more source
INTEGRAL observations of TeV plerions
Amongst the sources seen in very high gamma-rays several are associated with Pulsar Wind Nebulae (``TeV plerions''). The study of hard X-ray/soft gamma-ray emission is providing an important insight into the energetic particle population present in these
A. Achterberg+21 more
core +1 more source
Understanding the evolution of Pulsar Wind Nebulae
Pulsar Wind nebulae are visible as bright and extended sources at a wide range of energies, with varying properties and morphology along their different evolutionary stages.
B. Olmi
semanticscholar +1 more source
Deriving pulsar pair-production multiplicities from pulsar wind nebulae using H.E.S.S. and LHAASO observations [PDF]
Pulsar wind nebulae (PWNe) dominate the galactic gamma-ray sky at very high energies and they are major contributors to the leptonic cosmic ray flux. However, the question of whether or not pulsars also accelerate ions to comparable energies has not yet ...
S. T. Spencer, Alison M. W. Mitchell
semanticscholar +1 more source
Slow motion pulsar wind nebulae
We show that even the slow (subsonic) motion of pulsar wind nebulae (PWNe) relative to an ambient matter has a significant impact on their observables. The motion changes the appearance of nebulae on X-ray images, comparing to what would be observed for ...
K. Levenfish+4 more
semanticscholar +1 more source
Jet and counter-jet in transonic pulsar wind nebulae
X-ray observations show that a jet and a counter-jet in pulsar wind nebulae often differ one from another. Sometimes one of the jets is not observed at all. We show that the most likely reason for this difference is the relative motion of a pulsar and an
G. Ponomaryov, K. Levenfish, A. Petrov
semanticscholar +1 more source
Gigahertz-peaked spectra pulsars in Pulsar Wind Nebulae [PDF]
We have carried out a detailed study of the spectral nature of six pulsars surrounded by Pulsar wind nebulae (PWN). The pulsar flux density were estimated using the interferometric imaging technique of the Giant Metrewave Radio Telescope at three frequencies 325 MHz, 610 MHz and 1280 MHz. The spectra showed a turnover around gigahertz frequency in four
Karolina Rożko+4 more
openaire +3 more sources