Other
Scientific paper
Aug 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...307..726f&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 307, Aug. 15, 1986, p. 726-737.
Other
1
Flux Quantization, Stellar Color, Stellar Spectrophotometry, Supernovae, Black Body Radiation, Dilution, Radiative Transfer, Radii, Stellar Temperature
Scientific paper
A straightforward investigation of the UBVRK colors of the type I supernova SN 1972e in NGC 5253 and SN 1981b in NGC 4536 over the period of about 20-50 days after maximum light provides strong evidence for significant, wavelength-dependent, continuum flux dilution. Over the times considered in the evolution of the event, the continuum spectrum is essentially a blackbody at infrared wavelengths and a diluted blackbody at visible and ultraviolet wavelengths, the dilution increasing with increasing photon energy. A quantitative attempt to describe this dilution, using only a monochromatic dilution factor due to electron scattering in the supernova atmosphere, suggests that other effects are probably present and may be dominant. A major consequence of the above picture is that type I supernovae are substantially dimmer, therefore closer in distance, than their infrared color temperature would indicate, and substantially brighter, therefore much further away, than the UBV color temperature would indicate.
Arnett David. W.
Fu A. J.
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