Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..33..103g&link_type=abstract
Astrophysics and Space Science, vol. 33, Mar. 1975, p. 103-109.
Astronomy and Astrophysics
Astronomy
3
Nebulae, Radio Sources (Astronomy), Radio Spectra, Signal To Noise Ratios, Supernova Remnants, Angular Velocity, Data Acquisition, Least Squares Method, Optical Thickness, Radiant Flux Density, Thermal Emission
Scientific paper
Reliable radio spectra are established for the gamma-Cygni source and the IC 1318b, c nebular complex. Data used to obtain the spectra are presented, and determination of the spectra is outlined. A nonthermal spectral index is estimated for the gamma-Cygni source, and the nebular complex is shown to have an optically thin radio spectrum over the observed frequency range. Possibilities are discussed that the gamma-Cygni source may be a supernova remnant or that its emission may be a combination of thermal and nonthermal components.
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