Investigation of the Magellanic eclipsing binary HV 2241

Free access article

Issue		A&A Volume 377, Number 3, October III 2001


Page(s)		972 - 980
Section		Formation, structure and evolution of stars
DOI		http://dx.doi.org/10.1051/0004-6361:20011150

A&A 377, 972-980 (2001)
DOI: 10.1051/0004-6361:20011150

Investigation of the Magellanic eclipsing binary HV 2241

P. G. Ostrov¹, N. I. Morrell^{1, 2} and E. Lapasset^{3, 2}

¹ Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Paseo del Bosque S/N, 1900 La Plata, Argentina
e-mail: nidia@fcaglp.edu.ar
² Member of the Carrera del Investigador Científico, CONICET, Argentina
³ Observatorio Astronómico, Universidad Nacional de Córdoba, Laprida 854, 5000 Córdoba, Argentina
e-mail: lapasset@mail.oac.uncor.edu

(Received 25 April 2001 / Accepted 14 August 2001)

Abstract
We present a CCD V light curve of HV 2241 , together with some observations in the B band. We analysed our photometric data jointly with previously published radial velocities by means of the Wilson-Devinney code, and derived new values for the physical parameters of this massive eclipsing binary system. We confirm that this system is semi-detached, with the secondary (less massive and less luminous component) filling its Roche-lobe. From our analysis, we estimate the following masses and radii for the components of HV 2241: $M_1=36.2 \pm 0.7 {M}_{\odot}$ , $R_1=14.9 \pm 0.4 {R}_{\odot}$ , $M_2=18.4 \pm 0.7 {M}_{\odot}$ and $R_2=13.7 \pm 0.4 {R}_{\odot}$ . We review the spectral classification analysing HST and IUE data and discuss the temperature and the reddening for this star.

Key words: binaries: eclipsing -- stars: early-type -- stars: fundamental parameters -- stars: individual: HV 2241

Offprint request: P. G. Ostrov, ostrov@fcaglp.edu.ar

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