Results 81 to 90 of about 6,506 (234)

Focusing X‐Ray Optics for Astronomy

open access: yesX-Ray Optics and Instrumentation, Volume 2010, Issue 1, 2010., 2010
Focusing X‐ray telescopes have been the most important factor in X‐ray astronomy’s ascent to equality with optical and radio astronomy. They are the prime tool for studying thermal emission from very high temperature regions, non‐thermal synchrotron radiation from very high energy particles in magnetic fields and inverse Compton scattering of lower ...
Paul Gorenstein, Stephen L. O′Dell
wiley   +1 more source

IceCube Search for High-energy Neutrino Emission from TeV Pulsar Wind Nebulae [PDF]

open access: yesAstrophysical Journal, 2020
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

Heavy Elements and Electromagnetic Transients from Neutron Star Mergers

open access: yesAnnalen der Physik, Volume 536, Issue 2, February 2024.
Astro‐(physics) has made major leaps forward through the combined information provided by both gravitational waves and electromagnetic emission from the first detected neutron star merger event. This review provides an up‐to‐date overview of today's understanding of neutron star mergers and their electromagnetic emission and it discusses possible ...
Stephan Rosswog, Oleg Korobkin
wiley   +1 more source

The Dark Matter Annihilation Signal from Dwarf Galaxies and Subhalos

open access: yesAdvances in Astronomy, Volume 2010, Issue 1, 2010., 2010
Dark Matter annihilation holds great potential for directly probing the clumpiness of the Galactic halo that is one of the key predictions of the Cold Dark Matter paradigm of hierarchical structure formation. Here we review the γ‐ray signal arising from dark matter annihilation in the centers of Galactic subhalos.
Michael Kuhlen, Andrey V. Kravtsov
wiley   +1 more source

Jet and counter-jet in transonic pulsar wind nebulae

open access: yesJournal of Physics: Conference Series, 2021
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

TIME-DEPENDENT MODELING OF PULSAR WIND NEBULAE [PDF]

open access: yesThe Astrophysical Journal, 2013
A spatially independent model that calculates the time evolution of the electron spectrum in a spherically expanding pulsar wind nebula (PWN) is presented, allowing one to make broadband predictions for the PWN's non-thermal radiation. The source spectrum of electrons injected at the termination shock of the PWN is chosen to be a broken power law.
Vorster, M.   +3 more
openaire   +7 more sources

Multiband Nonthermal Radiative Study of PeVatron Candidate Pulsar Wind Nebula HESS J1849-000

open access: yesThe Astrophysical Journal
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

Laue Gamma‐Ray Lenses for Space Astrophysics: Status and Prospects

open access: yesX-Ray Optics and Instrumentation, Volume 2010, Issue 1, 2010., 2010
We review feasibility studies, technological developments, and the astrophysical prospects for Laue lenses devoted to hard X‐/gamma‐ray astronomy observations.
Filippo Frontera   +2 more
wiley   +1 more source

Slow motion pulsar wind nebulae

open access: yesJournal of Physics: Conference Series, 2021
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

Solution to the sigma problem of pulsar wind nebulae [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society: Letters, 2013
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

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