Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.7804l&link_type=abstract
American Astronomical Society, 183rd AAS Meeting, #78.04; Bulletin of the American Astronomical Society, Vol. 25, p.1415
Astronomy and Astrophysics
Astronomy
Scientific paper
We outline a program of star counts for 84 selected fields, each of 16 square degrees, from the APS Catalog of the POSS I survey. The APS Catalog contains data in two colors, blue and red, for all POSS I fields with |b| > 20(deg) . The program fields are a subset of the catalog chosen to allow a systematic probe of stellar components external to the thin disk. They represent a uniform, complete data set in two colors over a statistically significant portion of the sky. The total area of sky covered in this program exceeds the area of star counts published to date by a factor of ~ 20. For several of these fields we show sample color-magnitude diagrams and luminosity functions. We present preliminary results for the axial ratio of the stellar spheroid from star counts in selected fields at different galactic latitudes. Using a combination of modeling and simple comparisons we derive a value for the axial ratio.
Humphreys Roberta M.
Larsen Jeffrey A.
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