A new determination of the gas-to-dust ratio in M31

Details A new determination of the gas-to-dust ratio in M31 A new determination of the gas-to-dust ratio in M31

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....61..229b&link_type=abstract

Astronomy and Astrophysics, vol. 61, no. 2, Oct. 1977, p. 229-234.

Astronomy and Astrophysics

Astrophysics

20

Andromeda Galaxy, Cosmic Dust, Galactic Structure, Interstellar Gas, Astronomical Models, Globular Clusters, Interstellar Matter

Scientific paper

The mean gas-to-dust ratio in M31 is derived from observations of the H I column density and the color excess in the direction of 121 globular clusters. The angular resolution of the H I observations obtained with the Westerbork Synthesis Radio Telescope is comparable to the angular sizes of individual globular clusters. The mean gas-to-dust ratio turns out to be approximately 33 by 10 to the 20th power atoms/sq cm per magnitude; the value depends on radial distance from the center of the galaxy. Some effects that may influence the determination are discussed.

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