Results 21 to 30 of about 15,098 (205)
Gamma rays and neutrinos from the Crab Nebula produced by pulsar accelerated nuclei [PDF]
, 1997 We investigate the consequences of the acceleration of heavy nuclei (e.g. iron nuclei) by the Crab pulsar. Accelerated nuclei can photodisintegrate in collisions with soft photons produced in the pulsar's outer gap, injecting energetic neutrons which ...
A. D. Erlykin +33 more
core +2 more sources
Modelling the ArH$^+$ emission from the Crab Nebula [PDF]
, 2017 We have performed combined photoionization and photodissociation region (PDR) modelling of a Crab Nebula filament subjected to the synchrotron radiation from the central pulsar wind nebula, and to a high flux of charged particles; a greatly enhanced ...
Barlow, M. J. +2 more
core +3 more sources
The Crab Pulsar and Nebula as Seen in Gamma-Rays
Universe, 2021 Slightly more than 30 years ago, Whipple detection of the Crab Nebula was the start of Very High Energy gamma-ray astronomy. Since then, gamma-ray observations of this source have continued to provide new surprises and challenges to theories, with the ...
Elena Amato, Barbara Olmi
doaj +1 more source
A spatially resolved plerionic X-ray nebula around PSR B0540-69 [PDF]
, 2000 We present a high resolution Chandra X-ray observation of PSR B0540-69, the Crab-like 50 msec pulsar in the Large Magellanic Cloud. We use phase-resolved imaging to decompose the extended X-ray emission, as expected of a synchrotron nebula, from the ...
Gotthelf, E. V., Wang, Q. Daniel
core +3 more sources
The Radio Parallax of the Crab Pulsar: A First VLBI Measurement Calibrated with Giant Pulses
The Astrophysical Journal, 2023 We use four observations with the European very long baseline interferometry (VLBI) network to measure the first precise radio parallax of the Crab Pulsar. We found two in-beam extragalactic sources just outside the Crab Nebula, with one bright enough to
Rebecca Lin +4 more
doaj +1 more source
Neutral Atmospheric Density Measurement Using Insight-HXMT Data by the Earth Occultation Technique
The Astrophysical Journal Supplement Series, 2022 The Earth occultation technique has broad applications in both astronomy and atmospheric density measurements. We construct the background model during the occultation of the Crab Nebula observed by the Insight-Hard X-ray Modulation Telescope (Insight ...
Wang-Chen Xue +14 more
doaj +1 more source
A PeVatron Candidate: Modeling the Boomerang Nebula in X-ray Band
Universe, 2022 Pulsar wind nebula (PWN) Boomerang and the associated supernova remnant (SNR) G106.3+2.7 are among candidates for the ultra-high-energy (UHE) gamma-ray counterparts published by LHAASO.
Xuan-Han Liang +4 more
doaj +1 more source
The Crab Nebula flaring activity
Physics Letters B, 2014 The discovery made by AGILE and Fermi of a short time scale flaring activity in the gamma-ray energy emission of the Crab Nebula is a puzzling and unexpected feature, challenging particle acceleration theory.
G. Montani, M.G. Bernardini
doaj +1 more source
Accelerated expansion of the Crab Nebula and evaluation of its neutron-star parameters [PDF]
, 2003 A model of an accelerated expansion of the Crab Nebula powered by the spinning-down Crab pulsar is proposed, in which time dependence of the acceleration is connected with evolution of pulsar luminosity.
Bejger, M., Haensel, P.
core +2 more sources
CHEMICAL COMPOSITIONS OF CRAB NEBULA FILAMENTS
Odessa Astronomical Publications, 2013 The chemical compositions in filaments of Crab Nebula are obtained using two methods: new Ionization Correction Factors taking in to account density in homogeneities f the nebular gas, and new 3-stages method based on the optimized photoionization ...
V. V. Holovatyy +2 more
doaj +1 more source