Binary nature of the HADS stars AN Lyn & BE Lyn¹

 

J. H. Peña^2,3, A. Rentería⁴, C. Villarreal⁴, A. Pani³, H. Huepa³, J. L. Huepa³, A. Bernal², A. Arenas⁴, C. García⁴, R. León⁴, O. Trejo⁴, E. Colorado⁵, M. Sánchez-Cruces², J. S. Rechy-García²

 

² Facultad de Ciencias, Universidad Nacional Autónoma de México, México.

³ Observatorio Astronómico Nacional, Tonantzintla, México.

⁴ Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo. Postal 70-264, C.P. 04510, México, D.F., México (jhpena@astroscu.unam.mx).

⁵ Observatorio Astronómico Nacional, San Pedro Mártir, México.

 

Received March 10 2014.
Accepted November 7 2014.

 

RESUMEN

A partir de los recién determinados tiempos de máximo en la fotometría CCD de las estrellas HADS AN Lyn & BE Lyn y de una recopilación de tiempos de máximo de la literatura, hemos sido capaces de determinar la naturaleza binaria de estas estrellas, así como los parámetros físicos, con la fotometría uvby — β .

 

ABSTRACT

From newly determined times of maxima from CCD photometry of the HADS stars AN Lyn & BE Lyn and a compilation of previous times of maxima, we are able to determine the binary nature of these stars. We determine their physical parameters by means of uvby — β photometry.

Key Words: binaries — stars: variables: delta Scuti.

 

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ACKNOWLEDGMENT

This work was partially supported by PAPIIT IN104612 and PAPIME PE103112. Typing was done by J. Orta. C. Guzmán, F. Ruiz and A. Díaz assisted us in the computing. E. Raíirez assisted us in the observations. Special thanks to an anonymous referee for his suggestions of corrections which surely improved this paper. Most data were obtained during the 2013 Observational Astronomy Course at UNAM. This research has made use of the Simbad databases operated at CDS, Strasbourg, France and NASA ADS Astronomy Query Form.

 

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Note

¹ Based on observations collected at the Tonantzintla Observatory, Mexico.