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6 results

Clusters of Galaxies
  • Edited by W. Oegerle, M. Fitchett, L. Danly
  • Published online:
    06 July 2010
    Print publication:
    21 June 1990
  • Collected in this volume are the review papers from the Space Telescope Science Institute symposium on Clusters of Galaxies held in May 1989. Fifteen experts in the field have presented summaries of our current understanding of the formation and evolution of clusters and their constituent galaxies. Subjects covered include the existence and importance of subclustering, models of the evolution of clusters and the intracluster medium, the effect of the cluster environment on galaxies, observations of high redshift clusters, and the use of clusters as tracers of large scale structure. This book provides a timely focus for future observational and theoretical work on clusters of galaxies.

  • Observations of Local Interstellar Mg I and Mg II

  • F. Bruhweiler, W. Oegerle, E. Weiler, R. Stencel, Y. Kondo
  • Journal:
    International Astronomical Union Colloquium / Volume 81 / 1984
    Published online by Cambridge University Press:
    12 April 2016, pp. 64-66
    Print publication:
    1984
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  • We have combined Copernicus and IUE observations of 5 stars within 50 pc of the Sun to study the ionization of magnesium in the local interstellar medium (LISM). The high resolution Copernicus spectrometer was used to detect interstellar Mg I 2852 in the spectra of α Gru, α Eri, and α Lyr, while placing upper limits on Mg I in the spectra of α CMa and α PsA. Observations of Mg II 2795, 2802 for these stars were also obtained with IUE and Copernicus. The column densities of Mg I and Mg II are used to place constraints on the temperature of the LISM.