Magnetohydrodynamic turbulence in supernova remnants
نویسندگان
چکیده
منابع مشابه
Magnetohydrodynamic 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 کاملPostshock turbulence and diffusive shock acceleration in young supernova remnants
Context. Thin X-ray filaments are observed in the vicinity of young supernova remnants (SNR) blast waves. Identifying processes involved in the creation of such filaments would provide a direct insight of particle acceleration occurring within SNR, in particular regarding the cosmic ray yield issue. Aims. The present article investigates magnetic amplification in the upstream medium of SNR blas...
متن کاملNeutron 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 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 کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society: Letters
سال: 2009
ISSN: 1745-3925,1745-3933
DOI: 10.1111/j.1745-3933.2008.00591.x