Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981assl...87...51s&link_type=abstract
In: X-ray astronomy with the Einstein satellite; Proceedings of the Meeting, Cambridge, MA, January 28-30, 1980. (A82-33476 16-9
Astronomy and Astrophysics
Astronomy
2
Abundance, Satellite Observation, Supernova Remnants, X Ray Spectra, Ejecta, Electron-Ion Recombination, Heao 1, Heao 2, Nonequilibrium Ionization, Particle Collisions, Shock Heating, Stellar Spectrophotometry
Scientific paper
High quality X-ray spectra for the brightest remnants are now available from several satellites. The data for Tycho's remnant, Cas A, and Kepler's remnant have been used to derive elemental abundances which appear mostly larger than average interstellar values and increase with respect to those values as one progresses from Mg to Ca. Iron appears low. All the abundances appear particularly high in Tycho. Spectral observations above 20 keV for Cas A and Tycho show that electron-ion equilibration proceeds faster than the Coulomb rate. Ionization-recombination equilibration, however, is almost certainly not attained in these young remnants, and this may account for the two temperature components found to fit the spectra best by most X-ray observers. Spectral evidence, coupled with optical evidence that Tycho's remnant is in the Sedov phase of evolution, indicate that the ejecta were not primarily iron. The older remnant in Puppis has been well studied by a crystal spectrometer and shows many informative line features
No associations
LandOfFree
X-ray spectra of supernova remnants does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with X-ray spectra of supernova remnants, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray spectra of supernova remnants will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-743829