Results 101 to 110 of about 5,865 (191)

High-resolution Radio Study of Pulsar Wind Nebula MSH 15–52 and Supernova Remnant RCW 89

The Astrophysical Journal
We present high-resolution radio observations of the pulsar wind nebula (PWN) MSH 15–5 2 , which is renowned for its distinctive handlike shape, and its associated supernova remnant RCW 89. Using the Australia Telescope Compact Array, we obtained 3 and 6
S. Zhang, C.-Y. Ng, N. Bucciantini
doaj   +1 more source

Investigating the Anticorrelation between Photon Index and Flux of the Crab Using RXTE and NuSTAR

The Astrophysical Journal
We present a systematic study of the recently reported anticorrelation between X-ray flux and photon index (Γ) in the Crab Nebula, using archival Rossi X-Ray Timing Explorer (RXTE) Proportional Counter Array (3–50 keV), RXTE High Energy X-ray Timing ...
Debjit Chatterjee, Hsiang-Kuang Chang, Dipak Debnath, Koothodil Abhijith Augustine, Tzu-Hsuan Lin   +4 more
doaj   +1 more source

The Potential for Hadronic Particle Acceleration in Galactic Pulsar Wind Nebulae

Universe
Pulsar wind nebulae (PWNe), formed when the wind originating from a rapidly rotating neutron star flows out into its surroundings, have now been observed across the electromagnetic spectrum from the radio to the PeV gamma-ray regime.
Alison M. W. Mitchell, Samuel T. Spencer
doaj   +1 more source

TeV neutrinos and gamma rays from pulsars

, 2008
Recent studies suggest that pulsars could be strong sources of TeV muon neutrinos provided positive ions are accelerated by pulsar polar caps to PeV energies.
A. Bhadra, Ackermann, Ackermann, Aharonian, Aharonian, Aharonian, Aharonian, Ahrens, Alner, Amenomori, Arons, Bednarek, Beskin, Bhadra, Chadwick, Cheng, Cheng, Daugherty, de Naurois, Gaisser, Goldreich, Halzen, Halzen, Harding, Lessard, Link, Link, R. K. Dey, Ruderman   +28 more
core   +1 more source

Anticorrelation Between Flux and Photon Index of Hard-X-Ray Emission from the Crab

The Astrophysical Journal
Using Swift Burst Alert Telescope event-mode data during gamma-ray burst occurrences, we conduct spectral analysis for the Crab system. From 38 good observations, which span a period of 18 yr from 2006 to 2023, we find that the Crab’s X-ray flux not only
Koothodil Abhijith Augustine, Hsiang-Kuang Chang   +1 more
doaj   +1 more source

Shocks, Outflows and Bubbles: New Views on Pulsars and their Winds

, 2003
A typical young pulsar slows down at an imperceptible rate, its spin period increasing by less than 10 microseconds over the course of a year. However, the inertia of a pulsar is so extreme that to effect this tiny change in rotation rate, the star must ...
Gaensler, Bryan M.
core   +2 more sources

Future X-ray Polarimetry of Relativistic Accelerators: Pulsar Wind Nebulae and Supernova Remnants

Galaxies, 2018
Supernova remnants (SNRs) and pulsar wind nebulae (PWNs) are among the most significant sources of non-thermal X-rays in the sky, and the best means by which relativistic plasma dynamics and particle acceleration can be investigated.
Niccolò Bucciantini
doaj   +1 more source

LHAASO and Galactic cosmic rays. [PDF]

Innovation (Camb), 2022
Yang R.
europepmc   +1 more source

Spatially Resolved Polarization Variation of the Crab Nebula

The Astrophysical Journal
We examined the spatially resolved polarization variations in the Crab Nebula over 2 yr, using observational data from the Imaging X-ray Polarimetry Explorer, and offer key insights into its magnetic field structures and evolution.
Chao Zuo, Fei Xie, Mingyu Ge, Wei Deng, Kuan Liu, Fabio La Monaca, Alessandro Di Marco, Wenhao Wei, Wei Chen   +8 more
doaj   +1 more source

The IXPE Science of Pulsars and Their Nebulae

Galaxies
Pulsars (PSRs) and Pulsar Wind Nebulae (PWNe) form some of the most interesting high-energy astrophysical systems. Their prominent synchrotron emission makes them ideal candidates for polarimetry.
Niccolò Bucciantini, Roger W. Romani, Fei Xie, Josephine Wong   +3 more
doaj   +1 more source