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Soft X-ray Emission from the Vela Supernova Remnant


Moore, William Edwin (1976) Soft X-ray Emission from the Vela Supernova Remnant. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/CH0R-SF30.


A soft X-ray observation of the Vela Supernova Remnant is described. X-ray surface brightness maps of the Remnant are presented in three energy intervals, 0.15 - 0.5 keV, 0.5 - 1.0 keV, and 1.0 - 2.0 keV, and in two different spatial resolutions, 1° x 1°, and 40' x 40'. The maps show a vague shell structure, with two prominent emission regions and a third of somewhat less intensity. A new method for producing these maps is described. Spectral results are presented for the entire nebula and for the two prominent subregions. The spectra are found to be represented by the model of X-ray emission from a low density, high temperature plasma with abundances given by Allen (1973). Line emission, radiative recombination, and thermal bremsstrahlung are included. Narrow band measurements with a filter system reveal that the emission from O VIII is deficient by at least a factor of three; a possible explanation of this is considered. A search for X-ray pulsations from the Vela pulsar is described, and upper limits are given for any X-ray pulsations at the period observed for the radio pulsar.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Physics
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Garmire, Gordon Paul
Thesis Committee:
  • Unknown, Unknown
Defense Date:20 July 1975
Funding AgencyGrant Number
NASANGR 05-002-284
Record Number:CaltechTHESIS:03292017-094816214
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10116
Deposited By: Benjamin Perez
Deposited On:29 Mar 2017 20:24
Last Modified:09 Nov 2022 19:20

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