The radio source at the galactic nucleus

Details The radio source at the galactic nucleus The radio source at the galactic nucleus

Nov 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976mnras.177..319d&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 177, Nov. 1976, p. 319-333.

Astronomy and Astrophysics

Astronomy

93

Galactic Nuclei, Milky Way Galaxy, Radio Sources (Astronomy), Star Distribution, Crab Nebula, Galactic Structure, H Ii Regions, Infrared Spectra, Interstellar Extinction, Pulsars

Scientific paper

Observations of the small-diameter radio source in the galactic center have been made at 0.408, 0.96 and 1.66 GHz. These measurements show a low-frequency cutoff in the spectrum which is considered to be due to free-free absorption in the Sgr A West H II region. The nuclear source has a diameter of 1.4 arcsec at 1 GHz. The observed change of diameter with wavelength indicates that the observed diameters are a result of interstellar scattering. No significant intensity variation has been detected over a period of several years. On the basis of available data, the nuclear source is considered to be located at the nucleus of the Galaxy and is either the early stage of a supernova remnant or a pulsar.

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