Results 51 to 60 of about 199,466 (288)
Morphology of supernova remnants and their halos [PDF]
Astronomy & Astrophysics, 2021 Context. Supernova remnants (SNRs) are known to accelerate particles to relativistic energies, on account of their nonthermal emission. The observational progress from radio to gamma-ray observations reveals more and more morphological features that need to be accounted for when modeling the emission from those objects. Aims.
Iurii Sushch +4 more
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Parameterizing the Supernova Engine and Its Effect on Remnants and Basic Yields [PDF]
, 2017 Core-collapse supernova science is now entering an era in which engine models are beginning to make both qualitative and, in some cases, quantitative predictions.
C. Fryer +4 more
semanticscholar +1 more source
The Astrophysical Journal, 2023 The nature of Type Ia supernovae remains controversial. The youngest remnants of Ia supernovae hold clues to the explosion and to the immediate surroundings. We present a third epoch of Chandra observations of the ∼600 yr old Type Ia remnant 0519–69.0 in
Benson T. Guest +7 more
doaj +1 more source
Supernova Remnants in the Magellanic Clouds. VI. The DEM L316 Supernova Remnants [PDF]
The Astrophysical Journal, 2005 Accepted for ApJ v. 635 (December issue)
You-Hua Chu, R. M. Williams
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Detection of the Characteristic Pion-Decay Signature in Supernova Remnants [PDF]
Science, 2013 Accelerated Protons Although cosmic rays were first detected a hundred years ago, their origin is still not fully understood. Comic rays are high-energy particles, mostly protons, which bombard Earth from outer space.
M. Ackermann +198 more
semanticscholar +1 more source
The Cygnus Loop: Shock Precursors and Electron–Ion Equilibration
The Astrophysical Journal, 2023 The outermost edges of some supernova remnants are marked by filaments of pure Balmer line emission produced by nonradiative shock fronts. The H α profiles of these filaments provide the shock speed and electron–proton temperature ratio in the shock.
John C. Raymond +7 more
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PROBING X-RAY ABSORPTION AND OPTICAL EXTINCTION IN THE INTERSTELLAR MEDIUM USING CHANDRA OBSERVATIONS OF SUPERNOVA REMNANTS [PDF]
, 2015 We present a comprehensive study of interstellar X-ray extinction using the extensive Chandra supernova remnant (SNR) archive and use our results to refine the empirical relation between the hydrogen column density and optical extinction. In our analysis,
Dillon R. Foight +3 more
semanticscholar +1 more source
Grammage of cosmic rays around Galactic supernova remnants [PDF]
, 2015 The residence time of cosmic rays (CRs) in the Galaxy is usually inferred from the measurement of the ratio of secondary-to-primary nuclei, for instance the boron (B)/carbon (C) ratio, which provides an estimate of the amount of matter traversed by CRs ...
M. D’Angelo, P. Blasi, E. Amato
semanticscholar +1 more source
Highlights of Astronomy, 1974 AbstractThe present structure and recent changes in Cas A are discussed. On the deepest available exposures the optical remnant of this supernova is seen to consist of an almost complete shell. The southern part of this shell is outlined by knots that have developed during the last decade.
openaire +2 more sources
ARE MODELS FOR CORE-COLLAPSE SUPERNOVA PROGENITORS CONSISTENT WITH THE PROPERTIES OF SUPERNOVA REMNANTS? [PDF]
, 2015 The recent discovery that the Fe–K line luminosities and energy centroids observed in nearby supernova remnants are a strong discriminant of both progenitor type and circumstellar environment has implications for our understanding of supernova progenitor
D. Patnaude +6 more
semanticscholar +1 more source