Do Rich Clusters of Galaxies Produce Quasar Absorption Lines : Cycle 2

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Hst Proposal Id #4117

Scientific paper

Five quasars [NAB 0024+22, PKS 0003+15, UM 381, UM 324, and AO 1058+11] that lie behind rich clusters of galaxies will be studied spectroscopically with the FOS to see if the clusters produce ultraviolet absorption lines. All of the quasar spectra will be used also to help determine the statistics of quasar absorption lines, the main goal of the GTO proposal "Evolution of Lyman-alpha and C IV Absorption Systems" (J. Bahcall, PI). ST observations are required in order to observe the ultraviolet absorption lines that may be produced by the nearby rich clusters of galaxies.

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