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Spectrophotometry of supernovae and their remnants


Kirshner, Robert Paul (1975) Spectrophotometry of supernovae and their remnants. Dissertation (Ph.D.), California Institute of Technology.


NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document.

Spectrophotometry of extragalactic supernovae shortly after discovery, and of galactic supernova remnants has been used to derive the masses, temeratures[sic], compositions, and distances of supernovae.

The Crab Nebula is shown to have a mass of ionized hydrogen in excess of 0.3 [...], but no enrichment of oxygen, nitrogen, or sulfur. The Cygnus Loop is shown to emit [Fe XIV], indicating gas at 2 x 10[superscript 6] ?K: this establishes the thermal nature of the x-ray emission, and casts doubt on the Loop's size and distance.

Type II supernovae are shown to be consistent with a few solar masses of material at cosmic abundance. Their distances are found without reference to any other astronomical distance through a model of the expansion. Type I supernovae are shown to consist of about 1 solar mass of matter that may be 20 times enriched in iron, if the identification of [Fe II] lines at late stages is correct.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Astronomy
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Oke, J. Beverley
Thesis Committee:
  • Unknown, Unknown
Defense Date:26 July 1974
Record Number:CaltechETD:etd-04092004-111020
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1316
Deposited By: Imported from ETD-db
Deposited On:14 Apr 2004
Last Modified:26 Dec 2012 02:37

Thesis Files

PDF (Kirshner_rp_1975.pdf) - Final Version
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