X-ray spectra of the Cassiopeia A and TYCHO supernova remnants and their element abundances

Details X-ray spectra of the Cassiopeia A and TYCHO supernova remnants and their element abundances X-ray spectra of the Cassiopeia A and TYCHO supernova remnants and their element abundances

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...306..248t&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 306, July 1, 1986, p. 248-254.

Astronomy and Astrophysics

Astrophysics

47

Abundance, Supernova Remnants, X Ray Spectra, Bremsstrahlung, Emission Spectra, Line Spectra, Proportional Counters, Scintillation Counters, Stellar Models

Scientific paper

X-ray spectra of the supernova remnants Cas A and Tycho were obtained with the gas scintillation proportional counters on board Tenma. The observed spectra can be well fitted with single thermal bremsstrahlung continuum spectra with several emission features due to line blends of silicon, sulfur, argon, calcium, and iron. The mean energies of these line blends cannot be accounted for by invoking an equilibrium ionization model, but a simple, nonequilibrium model gives agreement with the data. In particular, the mean energy of each of the five line blends implies a value for the ionization time scale (the product of the electron density and time) of 1.0 × 1011 cm-3 s and 6.0 × 109 cm-3 s for Cas A and for Tycho respectively. The line intensities compared with those predicted by the nonequilibrium model give the element abundances in these objects. The results support current models of Type I and Type II supernovae.

Affiliated with

Also associated with

No associations

Rating

X-ray spectra of the Cassiopeia A and TYCHO supernova remnants and their element abundances 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 the Cassiopeia A and TYCHO supernova remnants and their element abundances, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray spectra of the Cassiopeia A and TYCHO supernova remnants and their element abundances will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1654759