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The Luminosity Calibration of the uvbyβ Photometry

Published online by Cambridge University Press:  30 March 2016

C. Jordi
Affiliation:
Dept. Astronomia i Meteorologia, Univ. de Barcelona, Avda. Diagonal 647, E-08028 Barcelona, Spain
X. Luri
Affiliation:
Dept. Astronomia i Meteorologia, Univ. de Barcelona, Avda. Diagonal 647, E-08028 Barcelona, Spain
E. Masana
Affiliation:
Dept. Astronomia i Meteorologia, Univ. de Barcelona, Avda. Diagonal 647, E-08028 Barcelona, Spain
J. Torra
Affiliation:
Dept. Astronomia i Meteorologia, Univ. de Barcelona, Avda. Diagonal 647, E-08028 Barcelona, Spain
F. Figueras
Affiliation:
Dept. Astronomia i Meteorologia, Univ. de Barcelona, Avda. Diagonal 647, E-08028 Barcelona, Spain
A. Domingo
Affiliation:
LAEFF, INTA, Apartado 50727, E-28080 Madrid, Spain
A.E. Gómez
Affiliation:
Obs. de Paris-Meudon, DASGAL, F-92195 Meudon Cedex, France
M.O. Mennessier
Affiliation:
Univ. Montpellier II, GRAAL, F-34095 Montpellier Cedex 5, France

Abstract

The ESA HIPPARCOS satellite has provided astrometry of unprecedented accuracy, allowing us to reassess, improve and refine the pre-Hipparcos luminosity calibrations. We review the “classical” absolute magnitude calibrations with the Strömgren-Crawford intermediate-band photometric system. A small zero point correction of about 2-4% seems necessary, as well as to refine the dependences on metallicity and projected rotational velocity. The need of a rigorous statistical treatment of the extremely precise Hipparcos data to derive definitive dependences of the luminosity on physical parameters is emphasized.

Type
II. Joint Discussions
Copyright
Copyright © Astronomical Society of Pacific 2002

References

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