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Absolute Parameter Determination in Low-Mass Eclipsing Binaries. Radiative Parameters for BH VIR, ZZ UMa and CR Cas

Published online by Cambridge University Press:  12 April 2016

R. Clement ,
V. Reglero ,
M. Garcia ,
J. Fabregat ,
A. Bravo  and
J. Suso
R. Clement
Affiliation:
- Departamento de Matematica Aplicada y Astronomia, U. Valencia. Dr Moliner 50, E-46100 Burjasot, Valencia, Spain
V. Reglero
Affiliation:
- Departamento de Matematica Aplicada y Astronomia, U. Valencia. Dr Moliner 50, E-46100 Burjasot, Valencia, Spain
M. Garcia
Affiliation:
- Departamento de Fisica, E.I. Industriales, U.P. Madrid, Ronda de Valencia 3, E-28012 Madrid, Spain
J. Fabregat
Affiliation:
- Departamento de Matematica Aplicada y Astronomia, U. Valencia. Dr Moliner 50, E-46100 Burjasot, Valencia, Spain
A. Bravo
Affiliation:
- Departamento de Fisica, E.I. Industriales, U.P. Madrid, Ronda de Valencia 3, E-28012 Madrid, Spain
J. Suso
Affiliation:
- Departamento de Matematica Aplicada y Astronomia, U. Valencia. Dr Moliner 50, E-46100 Burjasot, Valencia, Spain

Abstract

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A new uvby and Hβ monitoring program of low mass eclipsing binaries is currently being carried out in the framework of a 5 year observational program which also involves radial velocity determinations. The scope of this work is to provide very accurate absolute astrophysical parameters: mass, radius and effective temperatures, for main sequence late-type stars. One of the main goals is to improve the mass-luminosity relation in the low and intermediate mass range. A second objective is to perform accurate tests of the most recent grids of evolutionary models. This program is complementary to that currently being in progresss by the Copenhagen group.

In this contribution we present the photometric preliminary results obtained for three of the systems included in our long term survey: BH Vir, ZZ UMa and CR Cas for which, primary eclipses have been observed. Particular attention is paid to the determination of reddening, distances and radiative properties. A more detailed study will be carried out when the light curves and radial velocity measurements are completed

Type
IV. Input physics and basic stellar data
Information
International Astronomical Union Colloquium , Volume 137: Inside the Stars , 1993 , pp. 386 - 391
Copyright
Copyright © Astronomical Society of the Pacific 1993

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