The albedo and scattering phase function of interstellar dust and the diffuse background at far-ultraviolet wavelengths

Details The albedo and scattering phase function of interstellar dust and the diffuse background at far-ultraviolet wavelengths The albedo and scattering phase function of interstellar dust and the diffuse background at far-ultraviolet wavelengths

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...372..167h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 372, May 1, 1991, p. 167-184.

Astronomy and Astrophysics

Astrophysics

67

Background Radiation, Cosmic Dust, Diffuse Radiation, Far Ultraviolet Radiation, Interstellar Matter, Light Scattering, Albedo, Astronomical Models, Astronomical Spectroscopy, Milky Way Galaxy, Particle Size Distribution, Radiative Transfer

Scientific paper

The diffuse FUV background in a variety of targets has been observed with a nebular spectrometer designed specifically to eliminate potential sources of contamination. The intensity of the background near the Galactic plane is found to be much lower than previously published. The data are analyzed using a radiative transfer model with a limited set of free parameters, including those which describe the scattering properties of the interstellar dust. Strong evidence is presented that scattering of starlight by Galactic dust associated with neutral hydrogen produces the major part of the FUV diffuse background. Few assumptions are necessary to conclude that the albedo of the grains is low in the FUV. The grains, at least at high latitude, scatter fairly isotropically in the FUV. The low FUV albedo and the usual phase factor g are not consistent with predictions of standard models for the size distribution and composition of interstellar grains.

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