Astronomy and Astrophysics – Astronomy
Scientific paper
May 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974mmsai..45..153m&link_type=abstract
(Ministero della Pubblica Istruzione, CNR, and Universita di Trieste, European Regional Meeting in Astronomy, 2nd, Trieste, Ital
Astronomy and Astrophysics
Astronomy
Cassiopeia A, Hydrogen Ions, Interstellar Gas, Radio Sources (Astronomy), Absorption Spectra, Gas Temperature, H Lines, Microwave Emission, Optical Thickness, Radio Telescopes, Spin Temperature, Stellar Temperature
Scientific paper
Observations of the 21-cm line absorption against the two strongest radio sources, Cas A and Syg A, made with the 100-m telescope of the Effelsberg Observatory at 1420 MHz are discussed. The continuum temperatures obtained with the Effelsberg telescope are 3000 K and 2200 K for Cas A and Cyg A, respectively. Graphs showing the 21-cm line spectra in the direction of Cas A and in the direction of Cyg A are presented, along with graphs showing the spin temperature and optical depth in these two directions.
Hills D. L.
Mebold Ulrich
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