The soft x-ray spectra of Cassiopeia A and Tycho's supernova remnant

Journal Article · Fri Aug 15 04:00:00 EDT 1975 · Astrophys. J., v. 200, no. 1, pp. 158-162

DOI:https://doi.org/10.1086/153772· OSTI ID:4150748

Hill, R W; Burginyon, G A; Seward, F D

The x-ray spectra of Tycho's supernova remnant and Cas A have been measured with good statistics. Both spectra show evidence for silicon line emission. The thermal model of Tucker and Koren has been used to fit both spectra. To obtain a satisfactory fit to the data with this model, the silicon abundance must be increased about 10 times from the usual cosmic abundance values. Neither spectrum can be fitted with exponential or power-law models without the addition of line emission. Tycho's remnant shows very little soft X-ray absorption.

• Research Organization: Lawrence Livermore Laboratory, University of California, Livermore
• Sponsoring Organization: USDOE
• NSA Number: NSA-33-003761
• OSTI ID: 4150748
• Journal Information: Astrophys. J., v. 200, no. 1, pp. 158-162, Journal Name: Astrophys. J., v. 200, no. 1, pp. 158-162; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

*SUPERNOVA REMNANTS-- SOFT X RADIATION
640102* --Physics Research--Astrophysics & Cosmology--Stars
CHEMICAL COMPOSITION
ELECTRON DENSITY
N56200* --Physics (Astrophysics & Cosmology)--Stars
NEBULAE
SILICON
X-RAY SPECTRA