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The theory of QSO absorption line systems and their relationship to the galaxiesThe fundamental goal of this effort is to paint a picture of what the Ly-alpha forest clouds are and how they are distributed in space. Progress during the first phase of this program involved development of the 'Cheshire Cat Model' of Ly-alpha clouds in which systems over a large range of column densities are produced by disks with somewhat smaller column densities than those of normal galaxies. A prediction of the slab model of Ly-alpha clouds was confirmed by a new observational result, and the comparison of models to the new data allowed an estimate of the pressure of the intergalactic medium. This result should be forthcoming in pre-print form within the next month. The various results will now be described in more detail.
Document ID
19940011206
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Charlton, Jane (Pennsylvania State Univ. University Park, PA, United States)
Date Acquired
September 6, 2013
Publication Date
November 1, 1993
Subject Category
Astronomy
Report/Patent Number
NAS 1.26:194596
NASA-CR-194596
Accession Number
94N15679
Funding Number(s)
CONTRACT_GRANT: NAGW-3571
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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