Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...200...40h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 200, no. 1-2, July 1988, p. 40-50.
Astronomy and Astrophysics
Astronomy
77
Disk Galaxies, Infrared Astronomy Satellite, Milky Way Galaxy, Stellar Mass Ejection, Flux Density, Galactic Bulge, Galactic Structure, Stellar Luminosity, White Dwarf Stars
Scientific paper
An edge-on view of the Galaxy was obtained from the IRAS Point Source Catalog by selecting point sources with about equal flux density values at 12 microns and at 25 microns. The stars were counted as a function of longitude, latitude, and flux density. The counts were interpreted as a convolution of a spatial distribution and a luminosity function, indicating that two populations of stars are involved, either with the same spatial distribution but different luminosities, or with the same average luminosity but different spatial distributions. In the latter case, which is believed to be more consistent with findings, about 80 percent of stars belong to a flat thin disklike component with a thickness of 440 pc, a scale-length in the radial (R) direction of 4.5 kpc, and a cutoff at R = 9.5 kpc.
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