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Revista mexicana de astronomía y astrofísica
versão impressa ISSN 0185-1101
Rev. mex. astron. astrofis vol.46 no.2 Ciudad de México Out. 2010
Orbital elements for eight binaries. Study of the nature of wide components. I
F.M. Rica Romero1,2
1 Agrupación Astronómica de Mérida, C/José Ruiz Azorín, 14, 4 D, 06800, Mérida Spain.
2 Liga Iberoamericana de Astronomía (LIADA), Av. Almirante Guillermo Brown, 4998, 3000 Santa Fe, Argentina (frica0@gmail.com).
Received 2010 March 25
Accepted 2010 June 5
RESUMEN
Se calcularon nuevos parámetros orbitales y masas para ocho binarias. Las órbitas, en la mayoría de estas binarias, mostraron grandes residuos que aconsejaban obtener nuevos parámetros orbitales. Para determinar los parámetros orbitales iniciales se usó el método de Thielevan den Bos modificado, para posteriormente usar el método de corrección diferencial de Heintz para obtener los parámetros orbitales finales. El método Thielevan den Bos fue modificado para que un valor aproximado de la constante areal permitiera obtener buenos resultados. La naturaleza de las componentes distantes fue estudiada mediante fotometría BVIJHK y datos cinemáticos y astrométricos. Se realizó una búsqueda de nuevas compañeras alrededor de las binarias estudiadas.
ABSTRACT
New orbital parameters and masses for eight binaries were determined. Most of these were noted as being in need of correction due to large residuals to the previous best orbit. A modified Thielevan den Bos method was used to obtain initial orbits which were improved using the differential correction method of Heintz. The Thielevan den Bos method was modified so that an approximate value of the areal constant allowed good results to be obtained. The nature of wide components was studied using BVIJHK photometry, historical astrometry and kinematical data. A search for new unreported companions around the binaries was carried out.
Key Words: binaries: general binaries: visual instrumentation: high angular resolution techniques: high angular resolution.
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