Photometric study of the binary system NN Del

Authors: Gómez-Forrellad, J.M.1; Sánchez-Bajo, F.2; Corbera-Subirana, M.3; GarcÍa-Melendo, E.4; Vidal-Sainz, J.5

Source: Astrophysics and Space Science, Volume 283, Number 2, 2003 , pp. 297-304(8)

Publisher: Springer

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Abstract:



We present the results of the differential V light curve analysis of NN Del. We show that NN Del is an EA eclipsing binary system with a period of 99.27 days and a highly eccentric orbit. Photometric solutions obtained using the Russell and the Wilson-Devinney models seem to indicate that both components are very similar in radii and luminosities (assuming a F5 spectral type). Constraints imposed on the V luminosity of the system by the HIPPARCOS data suggest that the components of the system could be subgiants instead of main sequence stars.

Keywords: eclipsing binaries; light curve analysis; variable stars

Document Type: Research Article

Affiliations: 1: Grup d'Estudis Astronomics, Apartado 9481, 08080, Barcelona, Spain E-mail: jmgomez@astrogea.org 2: Departamento de Electrónica e Ingeniería Electromecánica, Escuela de Ingenierías Industriales, Universidad de Extremadura, Ctra de Elvas s/n. 06071, Badajoz, Spain; E-mail: fsanbajo@unex.es 3: Departament d'Informàtica i Matemàtica, Escola Politècnica Superior, Universitat de Vic, Laura 13, 08500, Vic, Barcelona, Spain; E-mail: montserrat.corbera@uvic.es 4: Esteve Duran Observatory Foundation, Montseny 46, Urb. El Montanya, 08553, Seva, Barcelona, Spain; E-mail: duranobs@astrogea.org 5: Grup d'Estudis Astronomics, Apartado 9481, 08080, Barcelona, Spain E-mail: gea@astrogea.org

Publication date: January 1, 2003

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