Synthetic DDO colours

Details Synthetic DDO colours Synthetic DDO colours

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...295..471m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 295, no. 2, p. 471-478

Astronomy and Astrophysics

Astrophysics

1

Calibrating, Color-Color Diagram, Mathematical Models, Metallicity, Stellar Color, Stellar Gravitation, Stellar Spectra, Stellar Temperature, Astronomical Spectroscopy, Atmospheric Models, Galaxies, Globular Clusters, Late Stars, Main Sequence Stars

Scientific paper

Calibrated synthetic David Dunlap Observatory (DDO) colors computed from Kurucz (1993) atmosphere models and fluxes are presented. The transformation equations to make synthetic colors consistent with the observational system are derived by using a set of calibration stars for which atmosphere parameters are known from high resolution spectroscopy. The synthetic C(45-48) versus C(42-45) diagram is compared with observational sequences of Population I giants and dwarfs and a good agreement is obtained. The metallicity effect in the synthetic diagram is discussed. The obtained results lead to the conclusion that synthetic calibrated DDO colors are valuable tools for analyzing Population I and II late-type stars and for computing integrated colors of globular clusters and galaxies.

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