Interstellar reddening and intercloud density in the solar vicinity

Details Interstellar reddening and intercloud density in the solar vicinity Interstellar reddening and intercloud density in the solar vicinity

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....77..198k&link_type=abstract

Astronomy and Astrophysics, vol. 77, no. 1-2, Aug. 1979, p. 198-203. Danish Natural Science Research Council

Astronomy and Astrophysics

Astrophysics

25

Early Stars, Hydrogen Clouds, Interstellar Extinction, Late Stars, Stellar Spectra, Absorption Spectra, F Stars, Interstellar Matter, Line Spectra, Solar Atmosphere, Space Density, Star Distribution, Stellar Envelopes

Scientific paper

Based on reddening values from a sample primarily of A and F stars, constrained to 84 areas averaging approximately 14 square degrees in size, a value of 0.02-0.05 atom/cu cm is tentatively suggested as the intercloud density. The main data sample consists of uvby-beta indices for 740 stars within 250 pc. The derivation is based on rather few assumptions, and the value obtained is in agreement with the densities derived from interstellar L-alpha absorption measured in spectra of late-type stars but lower than the density derived from L-alpha absorption measured in early-type spectra.

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