Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.1501c&link_type=abstract
American Astronomical Society, 187th AAS Meeting, #15.01; Bulletin of the American Astronomical Society, Vol. 27, p.1303
Astronomy and Astrophysics
Astronomy
Scientific paper
We present a study of the diffuse infrared emission of the Galaxy for the region 42(deg) <= l <= 146(deg) and 10(deg) <= b <= 50(deg) . The study was performed using the IRAS Sky Survey Atlas at 60mu m and 100mu m. The mean I_{60mum } - I_{100mum } flux density ratio is found to be 0.173 (0.001). However, the flux density ratio as a function of longitude deviates from the mean by an average of 18%. The flux density ratios have been translated into a minimum particle size for the dust, and it is found that the minimum particle size varies by a factor of ten (0.0003 - 0.003mu m). The maximum flux density ratio is found to be coincident with a ``trough'' in the dust in the local interstellar medium found by Gaustad & Van Buren (1993). In addition, it is found that the Mathis-Rumpl-Nordsieck power-law size distribution must be modified to enhance the number of smaller particles for the regions with higher I_{60mum } - I_{100mum } flux density ratio.
Canterna Ron W.
Ciardi David R.
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