منابع مشابه
Neutron Stars in Supernova Remnants
In the following, we shall briefly summarize some facts and ideas concerning the presence of neutron stars in Supernova remnants. While sources similar to the Crab Nebula require the presence of a central energetic object, shell-type remnants such as Cas A are compatible with the presence of neutron stars releasing a weak relativistic wind. Supernova remnants are usually classified into two ext...
متن کاملSupernova Remnants in Molecular Clouds
Massive (>∼8 M ) stars may end their lives in the molecular clouds in which they were born. O-type stars probably have sufficient photoionizing radiation and wind power to clear a region > 15 pc in radius of molecular material. Early B stars (B1–B3 on the main sequence, or 8 − 12 M stars) are not capable of this and may interact directly with molecular gas. Molecular clouds are known to be clum...
متن کاملMagnetohydrodynamic turbulence in supernova remnants
We present estimates of the angular power spectra of the synchrotron radiation intensity fluctuations at 6 and 20 cm for the shell type supernova remnant Cas A and the filled-centre Crab supernova remnant. We find that the intensity fluctuations of both sources have a power law power spectrum with index −3.24 ± 0.03. This power law power spectrum is consistent with the magnetohydrodynamic turbu...
متن کاملIron Needles in Supernova Remnants?
It has been suggested by Dwek (2004) that iron needles could explain the submillimetre emission from the Cas A supernova remnant (SNR) with only a very small total mass. We investigate whether a similar model holds for the Kepler supernova remnant, and find that its emission could indeed be explained by a dust mass of less than 10M⊙, dependent on the axial ratio l/a of the needles which we cons...
متن کاملShell-type Supernova Remnants
The role of Supernova Remnants (SNRs) for the production of the Galactic Cosmic Rays is reviewed from the point of view of theory and very high energy gamma-ray experiments. The point is made that theory can describe young SNRs very well, if the evidence from the synchrotron emission is used to empirically determine several parameters of the theory, and thus theory can predict the relative cont...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1965
ISSN: 0004-637X,1538-4357
DOI: 10.1086/148276