Results 11 to 20 of about 32,876 (212)

Cosmic-Ray Acceleration in Supernova Remnants

open access: yesUniverse, 2023
Supernova Remnants (SNRs) are generally believed to produce the cosmic rays in our Galaxy due to the powerful supernova blast waves generated by expanding SNRs.
Vera G. Sinitsyna, Vera Y. Sinitsyna
doaj   +1 more source

Pre-acceleration in the Electron Foreshock. II. Oblique Whistler Waves

open access: yesThe Astrophysical Journal, 2023
Thermal electrons have gyroradii many orders of magnitude smaller than the finite width of a shock, thus need to be pre-accelerated before they can cross it and be accelerated by diffusive shock acceleration.
Paul J. Morris   +5 more
doaj   +1 more source

Supernova remnants [PDF]

open access: yesInternational Astronomical Union Colloquium, 1989
Abstract.In this review I will concentrate on older remnants, by which I mean those in which radiative cooling is important somewhere and the swept up mass is sufficiently large for the details of the initial explosion not to matter. For such remnants it is the optical emission which is crucial since it allows us to deduce a great deal about the ...
openaire   +1 more source

The Supernova – Supernova Remnant Connection [PDF]

open access: yes, 2016
Many aspects of the progenitor systems, environments, and explosion dynamics of the various subtypes of supernovae are difficult to investigate at extragalactic distances where they are observed as unresolved sources. Alternatively, young supernova remnants in our own galaxy and in the Large and Small Magellanic Clouds offer opportunities to resolve ...
Milisavljevic, Dan, Fesen, Robert A.
openaire   +2 more sources

Radio Emission from Supernova Remnants: Model Comparison with Observations

open access: yesUniverse, 2022
Supernova remnants (SNRs) are an integral part in studying the properties of the Galaxy and its interstellar medium. For the current work, we compare the observed radio luminosities of SNRs to predictions based on a recent analytic model applied to 54 ...
Denis A. Leahy   +2 more
doaj   +1 more source

Numerical code for fitting radial emission profile of a shell supernova remnant: Application [PDF]

open access: yesSerbian Astronomical Journal, 2011
We present IDL (Interactive Data Language) codes for fitting a theoretical emission profile of a shell supernova remnant (SNR) to the mean profile of an SNR obtained from radio observations. Two considered theoretical models are: 1) a shell with
Opsenica Slobodan, Arbutina Bojan
doaj   +1 more source

Are Supernovae Responsible for the Gamma Ray Spectrum from the Galactic Center?

open access: yesActa Polytechnica CTU Proceedings, 2014
We discuss the supernova remnants distribution as a function of the galactic longitude and compare their positions to that of the detected TeV gamma ray sources. A large fraction of these sources either coincide or a close by known supernova remnants. If
Todor Stanev
doaj   +1 more source

Multiple-supernova remnants [PDF]

open access: yesInternational Astronomical Union Colloquium, 1989
ABSTRACTThe present observational and theoretical status of multiple-supernova remnants is briefly reviewed, and evolutionary models of the remnants around OB associations are presented. The remnants are followed for up to almost 30 Myr in various galactic environments (Gaussian or composite disks combined with cold or hot halos).
openaire   +1 more source

GALACTIC AND EXTRAGALACTIC SUPERNOVA REMNANTS AS SITES OF PARTICLE ACCELERATION

open access: yesActa Polytechnica, 2013
Supernova remnants, owing to their strong shock waves, are likely sources of Galactic cosmic rays. Studies of supernova remnants in X-rays and gamma rays provide us with new insights into the acceleration of particles to high energies. This paper reviews
Manami Sasaki
doaj   +1 more source

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