Thesis--Wisconsin. / Vita. Includes bibliographical references (leaves 153-156).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1981. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 121-126).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1963. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves [153]-173).

Thesis (Ph. D.)--University of Chicago, Dept. of Astronomy and Astrophysics, March 1999. / Includes bibliographical references. Also available on the Internet.

The 4.6m millimeter wave telescope at the University of British Columbia has been used to map a region 1/2° in diameter centered on 1=30°, b=0° in the J=1->0 transition of ¹²C¹⁶0. This study of the inner edge of the galactic molecular ring has revealed two well defined giant molecular clouds with diameters of approximately 30 pc and masses in the order of 5 x 10⁵ M⊙. In addition our analysis indicates that a substantial fraction, amounting to approximately 30%, of the integrated CO intensity comes from a feature covering the entire field observed. We have also found a complex of four clouds whose linewidths are a factor of two greater than those of the standard giant molecular clouds. The nature of these clouds is at present uncertain. The number of clouds detected in our survey gives as 5000 the total number of giant molecular clouds in the galaxy. / Science, Faculty of / Physics and Astronomy, Department of / Graduate

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Solid hydrogen coated graphite particles may be expelled from regions of star -formation into the general interstellar medium. The solid para- hydrogen mantles, which contain a small proportion of orthomolecules are stable against evaporation in the general interstellar radiation field. They are also stable against physical and chemical sputtering in HI regions. Extinction efficiencies are calculated for solid hydrogen particles and for graphite particles with solid hydrogen mantles. Graphite core -solid hydrogen grains are capable of producing excellent agreement with the interstellar extinction observations from 2u - 1100 A. The graphite core radius may be in the range ro = 0.04 - 0.06u and the solid hydrogen mantle radius in the range r = 0.15 - 0.25u. The albedo and phase function of these particles are consistent with the requirements imposed by the diffuse galactic light. Solid hydrogen is strongly anisotropic in its crystal structure and optical properties. Approximate models yield good agreement with the observed trends of the wavelength dependence of interstellar polarisation.

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Dissertation (Ph.D.)--University of Toledo, 2009. / Typescript. "Submitted to the Graduate Faculty as partial fulfillment of the requirements for the Doctor of Philosophy Degree in Physics." Bibliography: leaves 113-121.