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Comparisons of a standard galaxy model with stellar observations in five fieldsModern data on the distribution of stellar colors and on the number of stars as a function of apparent magnitude in five directions in the Galaxy are analyzed. It is found that the standard model is consistent with all the available data. Detailed comparisons with the data for five separate fields are presented. The bright end of the spheroid luminosity function and the blue tip of the spheroid horizontal branch are analyzed. The allowed range of the disk scale heights and of fluctuations in the volume density is determined, and a lower limit is set on the disk scale length. Calculations based on the thick disk model of Gilmore and Reid (1983) are presented.
Document ID
19840051486
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bahcall, J. N.
(Institute for Advanced Study Princeton, NJ, United States)
Soneira, R. M.
(Institute for Advanced Study Princeton, NJ, United States)
Date Acquired
August 12, 2013
Publication Date
May 1, 1984
Publication Information
Publication: Astrophysical Journal Supplement Series
Volume: 55
ISSN: 0067-0049
Subject Category
Astrophysics
Accession Number
84A34273
Funding Number(s)
CONTRACT_GRANT: NAS8-32902
CONTRACT_GRANT: NSF PHY-82-17352
Distribution Limits
Public
Copyright
Other

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