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The variable Crab Nebula [PDF]
Proceedings of 25th Texas Symposium on Relativistic Astrophysics — PoS(Texas 2010), 2011 The remarkable Crab Nebula is powered by an energetic pulsar whose relativistic wind interacts with the inner parts of the Supernova Remnant SN1054. Despite low-intensity optical and X-ray variations in the inner Nebula, the Crab has been considered until now substantially stable at X-ray and gamma-ray energies.
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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
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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
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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
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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
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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
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Physics Letters B, 2022 The Large High Altitude Air Shower Observatory (LHAASO) recently reported the detection of gamma-ray emissions with energies up to 1.1PeV from the Crab Nebula. Using the absence of vacuum Cherenkov effect by inverse-Compton electrons, we improve previous
Chengyi Li, Bo-Qiang Ma
doaj
On the Structure of the Crab Nebula [PDF]
Australian Journal of Physics, 1979 Utilizing a large number of published observations, we investigate the detailed structure of the Crab Nebula over a range of wavelengths from 3 5 mm to 75 em, and identify many different features. The spectra of some of these features are followed to longer wavelengths, extending to nearly 10 m. Physical conditions within the features are discussed.
LI Matveyenko, VI Kostenko
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Two-zone model for the broadband Crab nebula spectrum: microscopic interpretation
EPJ Web of Conferences, 2017 We develop a simple two-zone interpretation of the broadband baseline Crab nebula spectrum between 10−5 eV and ~ 100 TeV by using two distinct log-parabola energetic electrons distributions.
Fraschetti F., Pohl M.
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Advances in High Energy Physics, Volume 2012, Issue 1, 2012., 2012 Necessary condition for β‐decay suppression of a neutron in degenerate magnetized electron gas is formulated. Based on this, it is shown that, in superstrong magnetic field, equilibrium radius of a neutron star is approximately several times smaller than without the field influence. Therefore, we can make a prediction that in short‐period pulsars, such
Vladimir V. Skobelev, C. Q. Geng
wiley +1 more source