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Synthetic Stromgren photometry for F dwarf starsRecent synthetic spectrum and color calculations for cool dwarf star models are tested by comparison with observation. The accuracy of the computed dependence of the thermal colors B-V and b-y on effective temperature is examined, and H-beta indices are presented and compared with observed values. The accuracy of the predictions of the Stromgren uvby system metal-abundance indicator m1 and luminosity indicator c1 are tested. A new calibration of the c1, b-y diagram in terms of absolute magnitudes is given, making use of recent calculations of stellar isochrones. Observations of very metal-poor subdwarfs are used to study the accuracy of the isochrones. The c1, b-y diagram of the subdwarfs is compared with that of the turnoff-region stars in the very metal-poor globular cluster NGC 6397.
Document ID
19880048415
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bell, R. A. (Maryland, University College Park, United States)
Date Acquired
August 13, 2013
Publication Date
May 1, 1988
Publication Information
Publication: Astronomical Journal
Volume: 95
ISSN: 0004-6256
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NSF AST-85-13872
CONTRACT_GRANT: NSF AST-85-09915
CONTRACT_GRANT: NAGW-1004
Distribution Limits
Public
Copyright
Other