An Investigation of the Far-Infrared Emission of the Galaxy with DIRBE

Details An Investigation of the Far-Infrared Emission of the Galaxy with DIRBE An Investigation of the Far-Infrared Emission of the Galaxy with DIRBE

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.1503s&link_type=abstract

American Astronomical Society, 187th AAS Meeting, #15.03; Bulletin of the American Astronomical Society, Vol. 27, p.1304

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a study of the diffuse infrared emission of the local interstellar medium for the region 42(deg) <= l <= 146(deg) and 10(deg) <= b <= 50(deg) . The study was performed using the DIRBE 90(deg) elongation data at 60mu m, 100mu m, 140mu m and 240mu . We have used a simple cosecant law for zodiacal emission removal and have calculated the mean flux density ratios for the six colors. It is found that the I60-I100, I60-I140 and I60-I240 flux density ratios deviate from the mean flux density ratios as a function of galactic longitude by an average of 36%, 50%, and 58%, respectively. The I100-I140, I100-I240 and I140-I240 ratios show a similar but weaker longitude dependence. This indicates that the smaller grains (a < 0.01mu m) in the diffuse interstellar medium have a more variable population density than the population density of the larger grains.

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