• DocumentCode
    971990
  • Title

    Extragalactic 21-CM Line Studies

  • Author

    Heeschen, D.S. ; Dieter, N.H.

  • Author_Institution
    Natl. Radio Astronomical Observatory, Green Bank, W. Va.
  • Volume
    46
  • Issue
    1
  • fYear
    1958
  • Firstpage
    234
  • Lastpage
    239
  • Abstract
    The study of neutral hydrogen in extragalactic systems by means of its 21-centimeter line emission is a relatively new field of radio astronomy research. To date, radiation has been observed from seven galaxies and three clusters of galaxies. In this paper some of the results of these observations are described. Although the observational material presently available is quite limited, it does indicate the great potential power of extragalactic 21-centimeter line studies.
  • Keywords
    Arm; Electromagnetic wave absorption; Helium; Hydrogen; Observatories; Optical receivers; Optical sensors; Radio astronomy; Receiving antennas; Spirals;
  • fLanguage
    English
  • Journal_Title
    Proceedings of the IRE
  • Publisher
    ieee
  • ISSN
    0096-8390
  • Type

    jour

  • DOI
    10.1109/JRPROC.1958.286740
  • Filename
    4065249
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=971990