The gas-to-dust ratio and the molecular hydrogen content in Galactic cirrus clouds

Details The gas-to-dust ratio and the molecular hydrogen content in Galactic cirrus clouds The gas-to-dust ratio and the molecular hydrogen content in Galactic cirrus clouds

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...214..347h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 214, no. 1-2, April 1989, p. 347-352.

Astronomy and Astrophysics

Astrophysics

28

Cosmic Dust, Cosmic Gases, Milky Way Galaxy, Molecular Clouds, Absorption Spectra, Gravitational Effects, H Lines, Infrared Spectra

Scientific paper

Star count data obtained from blue glass copies of the POSS are used to derive the blue extinction, A(B), of the high-latitude bright nebulae LBN 629, LBN 683 and LBN 691. Values up to A(B) = 0.8 mag are found. For these clouds the total column density of hydrogen nuclei, N(H), as derived from the H I and (C-12)O line integrals and as derived from the 100-micron intensity is well correlated to the blue extinction A(B). Thus the commonly used gas-to-dust ratio (Bohlin et al., 1978) is also established for the Galactic cirrus.

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