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Elemental abundances in a type I SNRThe solid state spectrometer on the HEAO-2 X-ray observatory observed the X-ray spectrum of Tycho's SNR. The observations show a relative excess of line emission from Si, S, and Ar by or = 6 compared to that expected from a plasma of solar composition in collisional equilibrium and by a factor of or = 3 compared to Cas A. Similar excesses are not found for line emission from Mg and Fe. The data suggest that the SN observed by Tycho in 1572 produced significant amounts of Si group elements but did not eject large amounts of Fe as predicted by some models of Type I SN events.
Document ID
19790025961
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Becker, R. H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Holt, S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Smith, B. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
White, N. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Boldt, E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mushotzky, R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Serlemitsos, P. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
September 1, 1979
Subject Category
Astrophysics
Report/Patent Number
NASA-TM-80561
Report Number: NASA-TM-80561
Accession Number
79N34132
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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