Deep Galaxy counts, H I and dust at the South Galactic Pole and in the Magellanic Stream

Details Deep Galaxy counts, H I and dust at the South Galactic Pole and in the Magellanic Stream Deep Galaxy counts, H I and dust at the South Galactic Pole and in the Magellanic Stream

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.224.1059f&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 224, Feb. 15, 1987, p. 1059-1072.

Astronomy and Astrophysics

Astronomy

26

Cosmic Dust, Galaxies, Hydrogen, Magellanic Clouds, Milky Way Galaxy, Radiant Flux Density, Southern Sky, Astronomical Photography, Interstellar Extinction, Spatial Distribution

Scientific paper

Galaxy counts to B of less than about 20 mag obtained through machine measurements, atomic hydrogen column densities and IRAS data for fields around the South Galactic Pole (SGP) are intercompared. A feature in the Galaxy distribution at the SGP, which has been attributed to absorption, has no excess H I nor does there seem to be any corelation with the 100-micron flux from the faint IRAS cirrus found over much of the SGP area. The significant correlation found between H I and the 100 micron flux is consistent with a gas-to-dust ratio for the cirrus at the SGP similar to that normally associated with the Galaxy. With the present models, the IRAS data correspond to a maximum variation in reddening E(B-V) at the SGP of about 0.02 mag, with an average of only about 0.002-0.005 mag over the area of 135 sq deg investigated. Finally, despite the presence of large amounts of gas in the Magellanic Stream, no associated IRAS 100 micron flux is detected, indicating that the Stream has a different dust content from that of the gas in the Galaxy.

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