Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....63...63d&link_type=abstract
Astronomy and Astrophysics, vol. 63, no. 1-2, Feb. 1978, p. 63-68. Research supported by the Consiglio Nazionale delle Ricerche
Astronomy and Astrophysics
Astronomy
40
Radio Sources (Astronomy), Supernova Remnants, Astronomical Maps, Astronomical Photography, Forbidden Transitions, H Alpha Line, H Ii Regions, Radiant Flux Density
Scientific paper
Three supernova remnants (SNR) have been identified in a field 8 arcmin in diameter centered on the southern arm of M33. The SNR were detected on the basis of strong forbidden S II emission using a set of plates in narrow-band H-alpha and forbidden S II light and in blue, green, and red broadband colors. These objects are the three strongest radio sources in that field in the high-resolution 21-cm radio map of M33 obtained by Israel and van der Kruit (1974). From this result it appears that SNR may seriously contaminate H II region population counts based on radio fluxes in M33.
Benvenuti Piero
Dodorico Sandro
Sabbadin Franco
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