An attempt to determine the circumstellar reddening law

Details An attempt to determine the circumstellar reddening law An attempt to determine the circumstellar reddening law

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976mnras.174p..29a&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 174, Feb. 1976, p. 29P-33P.

Astronomy and Astrophysics

Astronomy

15

Astronomical Photometry, Cosmic Dust, Infrared Spectra, Interstellar Extinction, Absorption Spectra, Brightness Temperature, Continuous Spectra, Early Stars, Emission Spectra, Energy Spectra, Interstellar Gas, Interstellar Matter, Stellar Envelopes

Scientific paper

The reddening law for circumstellar dust can in principle be determined if it is assumed that the energy radiated at infrared wavelengths by the dust exactly balances that absorbed from the star. The method is attempted for a number of early-type stars, and no evidence is found that the ratio of total to selective absorption differs from that of interstellar reddening. An apparent reduction of the ratio of total to selective absorption relative to the interstellar case is probably explained by free-free emission from the circumstellar gas.

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