The gamma Cygni supernova remnant and nebula

Details The gamma Cygni supernova remnant and nebula The gamma Cygni supernova remnant and nebula

Dec 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974apj...194..337j&link_type=abstract

Astrophysical Journal, vol. 194, Dec. 1, 1974, pt. 1, p. 337-342. Research supported by the Lockheed Independent Research Progr

Astronomy and Astrophysics

Astronomy

14

Astronomical Photometry, Nebulae, Radio Astronomy, Supernova Remnants, Astronomical Maps, Emission Spectra, Hydrogen Recombinations, Interstellar Extinction, Microwave Emission, Radiant Flux Density

Scientific paper

The object is anomalous, and the existing data appear to be rather contradictory or ambiguous. We discuss previous and new observations. The new observations are: Palomar Schmidt plates in the blue, yellow, red, and near-infrared; radiofrequency-continuum maps at 7.875 and 15.5 GHz; flux densities at 31.4 and 85 GHz; and H 94 alpha-line data. A nebula, found only in the red, is identifiable with a small component of a supernova remnant which is altogether about 1 deg in diameter. The spectral index of the large, nonthermal remnant is prevalently about -0.8, but the index is probably not less than -0.5 in the small component. The amorphous structure of the red nebula suggests that its light is nonthermal, since it is not a reflection nebula of the star gamma Cygni.

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