The distribution of interstellar dust in the solar neighborhood

Details The distribution of interstellar dust in the solar neighborhood The distribution of interstellar dust in the solar neighborhood

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasp..105.1127g&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 692, p. 1127-1140

Astronomy and Astrophysics

Astronomy

43

Cosmic Dust, Density Distribution, Infrared Cirrus (Astronomy), Interstellar Matter, Sky Surveys (Astronomy), Solar Neighborhood, Astronomical Maps, Distribution Functions, Infrared Astronomy, Stellar Parallax

Scientific paper

We surveyed the IRAS data base at the positions of the 1808 O6-B9.5 stars in The Bright Star Catalog for extended objects with excess emission at 60 microns, indicating the presence of interstellar dust at the location of the star. Within 400 pc the filling factor of the interstellar medium, for dust clouds with a density greater than 0.5/cu cm is 14.6 + or - 2.4%. Above a density of 1.0/cu cm, the density distribution function appears to follow a power law index - 1.25. When the dust clouds are mapped onto the galactic plane, the sun appears to be located in a low-density region of the interstellar medium of width about 60 pc extending at least 500 pc in the direction of longitudes 80 deg - 260 deg, a feature we call the 'local trough'.

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