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The spectrum of HD46223

Zagury, Frédéric

The spectrum of HD46223 was established from the optical to the far UV and normalized by the spectrum of a non-reddened star of same spectral type. The resulting spectrum is separated into two components. One is the direct starlight. The second is an additional component of light scattered at small angles. In the optical the spectrum is dominated …

Scattered starlight contamination in the spectrum of reddened stars

Zagury, Frédéric

The comparison, undertaken in preceding papers, of the UV observations of nebulae and of reddened stars reveals contradictory aspects of interstellar extinction. The aim of this paper is to understand the implications hidden behind the apparent contradictions. The questions treated will be: how can small grains with an isotropic phase function mak…