Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...407..115v&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 407, no. 1, p. 115-125.
Astronomy and Astrophysics
Astrophysics
18
Astronomical Photometry, Chronology, Galactic Structure, Milky Way Galaxy, Scale Height, Metallicity, Stellar Color, Stellar Temperature
Scientific paper
A faint photometric survey in the Stromgren system was initiated in order to develop samples which best probe the thick disk population. The technique acquires stars in a kinematically independent fashion with understandable distance-color-metallicity selection effects, and provides metallicities and effective temperatures for a large sample of stars simultaneously. The old thin disk is found to exhibit an exponential scale height of about 290 (330) pc, and a modal metallicity of -0.7 (-0.4). The thick disk has an exponential scale height of 860 +/- 90 (950 +/- 90) pc and modal metallicity of about -1.2 (-0.9). The color-metallicity distribution of field stars is consistent with coevality over the metallicity range -0.5 to -2.0.
Bothun Gregory D.
Hippel Ted von
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