57.5 MHz observations of extended nonthermal sources in the galactic plane

Details 57.5 MHz observations of extended nonthermal sources in the galactic plane 57.5 MHz observations of extended nonthermal sources in the galactic plane

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....92.1372o&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 92, Dec. 1986, p. 1372-1380.

Astronomy and Astrophysics

Astronomy

35

Astronomical Spectroscopy, Milky Way Galaxy, Nonthermal Radiation, Pulsars, Radio Sources (Astronomy), Supernova Remnants, Absorption Spectra, Astronomical Maps, Continuous Spectra, Data Reduction, Emission Spectra, H Ii Regions, Radiant Flux Density

Scientific paper

The sources that appear in absorption against the nonthermal galactic background in the present radio-continuum maps of two fields in the galactic plane are identified as H II regions. Three extended sources that are observed in emission are classified as SNRs on the basis of derived spectral index values. The objects are G8.7-0.1, which is the extended component of the W30 region, G18.1-0.2, and G19.96-0.18; this last is noted to have a flat radio spectrum and a filled-center morphology, and is suggested to be a Crab-like SNR.

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