scholarly journals HAWC Observation of Supernova Remnants and Pulsar Wind Nebulae

2016 ◽  
Author(s):  
C. Michelle Hui ◽  
Hao Zhou
Keyword(s):  
Supernova Remnants ◽  
Pulsar Wind Nebulae ◽  
Pulsar Wind

scholarly journals The H.E.S.S. Galactic Plane Survey

2009 ◽  
Vol 5 (H15) ◽  
pp. 808-808
Author(s):  
Emma de Oña-Wilhelmi
Keyword(s):  
Supernova Remnants ◽  
Binary Systems ◽  
Galactic Plane ◽  
Giant Molecular Clouds ◽  
Pulsar Wind Nebulae ◽  
Compact Binary ◽  
Pulsar Wind ◽  
Star Formation Regions ◽  
Galactic Sources ◽  
Gps Observations

AbstractThe H.E.S.S. Galactic Plane Survey (GPS) has revealed a large number of Galactic Sources, including Pulsar Wind Nebulae (PWN), Supernova Remnants (SNRs), giant molecular clouds, star formation regions and compact binary systems, as well as a number of unidentified objects, or dark sources, for which no obvious counterparts at other wavelengths have yet been found. We will review the latest results from the GPS observations and discuss the most interesting cases.

scholarly journals Peculiar Differences in Radio and X-ray Synchrotron Radiation from Pulsar Wind Nebulae

2004 ◽  
Vol 218 ◽  
pp. 221-224
Author(s):  
John R. Dickel ◽  
Shiya Wang
Keyword(s):  
Synchrotron Radiation ◽  
Radio Emission ◽  
Supernova Remnants ◽  
Crab Nebula ◽  
Pulsar Wind Nebulae ◽  
X Ray ◽  
Pulsar Wind ◽  
The Crab Nebula

Several Crab-type supernova remnants appear to have very bright non-thermal X-ray cores just around the pulsar or expected pulsar. This X-ray brightness is often not matched by a corresponding increase in radio emission. The best example of this phenomenon is in N157B in the LMC. G21.5−0.9 and possibly 3C 58 also show it while the Crab Nebula and 0540−69.3 do not. Some method to enhance the higher energy particles must be present in these objects.

scholarly journals A catalogue of Galactic supernova remnants in the far-infrared: revealing ejecta dust in pulsar wind nebulae

2018 ◽  
Vol 483 (1) ◽  
pp. 70-118 ◽  
Author(s):  
H Chawner ◽  
K Marsh ◽  
M Matsuura ◽  
H L Gomez ◽  
P Cigan ◽  
...  
Keyword(s):  
Supernova Remnants ◽  
Far Infrared ◽  
Pulsar Wind Nebulae ◽  
Pulsar Wind

scholarly journals A LOFAR search for steep-spectrum pulsars in supernova remnants and pulsar wind nebulae

2019 ◽  
Vol 623 ◽  
pp. A90 ◽  
Author(s):  
S. M. Straal ◽  
J. van Leeuwen
Keyword(s):  
Black Hole ◽  
Supernova Remnants ◽  
Supernova Remnant ◽  
Point Sources ◽  
Pulsar Wind Nebulae ◽  
Upper Limits ◽  
Formation History ◽  
Propagation Effects ◽  
Pulsar Wind ◽  
Rule Out

Pinpointing a pulsar in its parent supernova remnant (SNR) or resulting pulsar wind nebula (PWN) is key to understanding its formation history and the pulsar wind mechanism, yet only about half the SNRs and PWNe appear associated with a pulsar. Our aim was to find the pulsars in a sample of eight known and new SNRs and PWNe. Using the LOFAR radio telescope at 150 MHz, each source was observed for 3 h. We covered the entire remnants where needed, by employing many tied-array beams to tile out even the largest objects. For objects with a confirmed point source or PWN we constrained our search to those lines of sight. We identified a promising radio pulsar candidate towards PWN G141.2+5.0. The candidate, PSR J0337+61, has a period of 94 ms and a DM of 226 pc cm−3. We re-observed the source twice with increased sensitivities of 30% and 50%, but did not re-detect it. It thus remains unconfirmed. For our other sources we obtain very stringent upper limits of 0.8 − 3.1 mJy at 150 MHz. Generally, we can rule out that the pulsars travelled out of the remnant. From these strict limits we conclude our non-detections towards point sources and PWNe are the result of beaming and propagation effects. Some of the remaining SNRs should host a black hole rather than a neutron star.

scholarly journals Magnetic Rayleigh-Taylor instability for Pulsar Wind Nebulae in expanding Supernova Remnants

2004 ◽  
Vol 423 (1) ◽  
pp. 253-265 ◽  
Author(s):  
N. Bucciantini ◽  
E. Amato ◽  
R. Bandiera ◽  
J. M. Blondin ◽  
L. Del Zanna
Keyword(s):  
Supernova Remnants ◽  
Taylor Instability ◽  
Pulsar Wind Nebulae ◽  
Rayleigh Taylor Instability ◽  
Pulsar Wind

scholarly journals Pulsar Wind Nebulae inside Supernova Remnants as Cosmic-Ray PeVatrons

2018 ◽  
Vol 478 (1) ◽  
pp. 926-931 ◽  
Author(s):  
Yutaka Ohira ◽  
Shota Kisaka ◽  
Ryo Yamazaki
Keyword(s):  
Supernova Remnants ◽  
Cosmic Ray ◽  
Pulsar Wind Nebulae ◽  
Pulsar Wind

scholarly journals Spherically symmetric relativistic MHD simulations of pulsar wind nebulae in supernova remnants

2003 ◽  
Vol 405 (2) ◽  
pp. 617-626 ◽  
Author(s):  
N. Bucciantini ◽  
J. M. Blondin ◽  
L. Del Zanna ◽  
E. Amato
Keyword(s):  
Supernova Remnants ◽  
Spherically Symmetric ◽  
Pulsar Wind Nebulae ◽  
Mhd Simulations ◽  
Pulsar Wind

VERITAS OBSERVATIONS OF RELATIVISTIC JETS

2012 ◽  
Vol 08 ◽  
pp. 55-60
Author(s):  
RESHMI MUKHERJEE
Keyword(s):  
Black Holes ◽  
Supernova Remnants ◽  
Binary Systems ◽  
Active Galaxies ◽  
Relativistic Jets ◽  
Pulsar Wind Nebulae ◽  
Cherenkov Telescopes ◽  
Astrophysical Objects ◽  
Pulsar Wind ◽  
Galactic Sources

VERITAS is an array of four imaging atmospheric Cherenkov telescopes located in southern Arizona, and is now starting its fifth year of observations of the northern Sky at energies > 100 GeV. Observations of astrophysical objects in the TeV band are sensitive probes of highly energetic processes occurring in these sources. The majority of the active galaxies detected at TeV energies are blazars, sources where we view the jet nearly along its axis. TeV and multiwavelength observations of blazars help us to better understand the mechanisms of ultrarelativistic jet production by supermassive black holes, and constrain models of particle acceleration in blazar jets. Galactic sources at TeV energies include supernova remnants, pulsar wind nebulae, and binary systems, and TeV emission is a key diagnostic of highly energetic particles in these objects. This report presents recent results from VERITAS on Galactic and extragalactic sources.

scholarly journals Revisiting the evolution of nonradiative supernova remnants: A hydrodynamical-informed parameterization of the shock positions

2021 ◽  
Author(s):  
R Bandiera ◽  
N Bucciantini ◽  
J Martín ◽  
B Olmi ◽  
D F Torres
Keyword(s):  
Supernova Remnants ◽  
Supernova Remnant ◽  
Ambient Medium ◽  
Structural Features ◽  
Pulsar Wind Nebulae ◽  
Reverse Shock ◽  
Self Similar ◽  
Pulsar Wind ◽  
The One ◽  
Similar Solutions

Abstract Understanding the evolution of a supernova remnant shell in time is fundamental. Such understanding is critical to build reliable models of the dynamics of the supernova remnant shell interaction with any pulsar wind nebula it might contain. Here, we perform a large study of the parameter space for the one-dimensional spherically symmetric evolution of a supernova remnant, accompanying it by analytical analysis. Assuming, as is usual, an ejecta density profile with a power-law core and an envelope, and a uniform ambient medium, we provide a set of highly-accurate approximations for the evolution of the main structural features of supernova remnants, such as the reverse and forward shocks and the contact discontinuity. We compare our results with previously adopted approximations, showing that existing simplified prescriptions can easily lead to large errors. In particular, in the context of pulsar wind nebulae modelling, an accurate description for the supernova remnant reverse shock is required. We also study in depth the self-similar solutions for the initial phase of evolution, when the reverse shock propagates through the envelope of the ejecta. Since these self-similar solutions are exact, but not fully analytical, we here provide highly-accurate approximations as well.

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