Star counts redivivus. I - A new look at the galaxy at faint magnitudes

Details Star counts redivivus. I - A new look at the galaxy at faint magnitudes Star counts redivivus. I - A new look at the galaxy at faint magnitudes

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...409..635r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 409, no. 2, p. 635-662.

Astronomy and Astrophysics

Astrophysics

193

Astronomical Models, Galactic Structure, Milky Way Galaxy, Star Distribution, Stellar Magnitude, Galactic Halos, Stellar Color

Scientific paper

We have used models of the Galactic stellar distribution to analyze Majewski's (1992) deep star-count data toward the north Galactic pole. While the total number counts are in reasonable agreement with the predictions of the current standard models, we find striking discrepancies between the observed and predicted color distributions at Faint (V greater than 20) magnitudes: the previously defined 'standard' model predicts too many halo stars and too few disk stars. Indeed, our observations show that disk stars are the majority population to at least V = 21. We have investigated the possible sources of these discrepancies using star-count models and present an interim model which better fits the available data.

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