Hydrogen 21-cm line temperature scale

Details Hydrogen 21-cm line temperature scale Hydrogen 21-cm line temperature scale

Apr 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975aj.....80..307h&link_type=abstract

Astronomical Journal, vol. 80, Apr. 1975, p. 307-310.

Astronomy and Astrophysics

Astronomy

20

H Lines, Interstellar Gas, Microwave Emission, Temperature Scales, Calibrating, Gas Temperature, Hydrogen, Radio Astronomy

Scientific paper

The recent publication of two extensive, high-resolution, galactic 21-cm line surveys, covering both the northern and southern galactic plane regions, draws attention to the long-standing temperature scale problem. The early Dutch and Australian surveys had temperature scales differing by 28%. The more recent surveys show a disagreement of over 40%. New data taken recently in Australia indicate that the temperature scales of the published Australian surveys are high by a factor of 1.28. The new Maryland-Green Bank survey, the new Parkes survey, and the Berkeley survey are shown to agree with each other to within 5%, which allows us to establish a common scale for these surveys.

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