Revista mexicana de astronomía y astrofísica

 

Orbit, masses and spectral analysis of the visual binary a 2329

 

M. Andrade^1,2

 

1 Astronomical Observatory R. M. Aller, Universidade de Santiago de Compostela, Spain.

2 Departamento de Matemática Aplicada, Escola Politécnica Superior, Universidade de Santiago de Compostela, Spain.

Manuel Andrade: Astronomical Observatory R. M. Aller, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galiza, Spain (www.usc.es/astro), and Departamento de Matemática Aplicada, Escola Politécnica Superior, Universidade de Santiago de Compostela, 27002 Lugo, Galiza, Spain (oandrade@usc.es).

 

Received 2007 February 06
Accepted 2007 February 26

 

Resumen

Se presenta una órbita revisada de la binaria A 2329, calculada a partir de un conjunto de medidas interferométricas distribuidas a lo largo de un período orbital. En base a estos nuevos elementos orbitales y a la paralaje de Hipparcos se obtiene una masa dinámica para el sistema de 1.25 ± 0.14 . También se confirma, considerando nuevos datos espectrales, que el tipo espectral MK es K7V.

 

Abstract

A revised orbit for the visual binary A 2329, calculated taking into account a set of interferometric measures distributed over one orbital revolution, is presented. On the basis of new orbital elements and the Hipparcos parallax, a dynamical mass of the system of 1.25 ± 0.14 is obtained. By considering new spectral data, we confirm its MK spectral type as K7V.

Key Words: Astrometry—binaries:visual—stars: fundamental parameters—stars: individual (a 2329)

 

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Acknowledgement

The author is grateful to J. A. Docobo for his useful comments and recommendations. In addition, I thank V. Tamazian and N. D. Melikian for providing the spectra and for helpful discussions regarding the MK classification as well. This paper was financed by research project AYA 2004–07003 of the Spanish Ministerio de Educación y Ciencia.

 

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