Cepheid Variables in the Large Magellanic Cloud ClusterNGC 1866. I. NewBVRI CCD Photometry

Wolfgang P. Gieren; Matías Gómez; Jesper Storm; Thomas J. Moffett; L. Infante; Thomas G. Barnes III; Doug Geisler; Pascal Fouqué

doi:10.1086/313418

The Astrophysical Journal Supplement Series

Cepheid Variables in the Large Magellanic Cloud Cluster NGC 1866. I. New BVRI CCD Photometry

Wolfgang P. Gieren^1,9, Matías Gómez^2,9, Jesper Storm³, Thomas J. Moffett^4,10, L. Infante⁵, Thomas G. Barnes III^6,10, Doug Geisler⁷, and Pascal Fouqué⁸

© 2000. The American Astronomical Society. All rights reserved. Printed in U.S.A.
The Astrophysical Journal Supplement Series, Volume 129, Number 1 Citation Wolfgang P. Gieren et al 2000 ApJS 129 111 DOI 10.1086/313418

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Author affiliations

¹ Departamento de Física, Grupo de Astronomía, Universidad de Concepción, Casilla 160-C, Concepción, Chile

² Departamento de Astronomía y Astrofísica, P. Universidad Católica de Chile, Casilla 104, Santiago 22, Chile

³ Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany

⁴ Department of Physics, 1396 Physics Building, Purdue University, West Lafayette, IN 47907-1396

⁵ Departamento de Astronomía y Astrofísica, P. Universidad Católica de Chile, Casilla 104, Santiago 22, Chile

⁶ McDonald Observatory, University of Texas at Austin, Austin, TX 78712-1083

⁷ Departamento de Física, Grupo de Astronomía, Universidad de Concepcion, Casilla 160-C, Concepción, Chile

⁸ Observatoire de Paris, Section de Meudon, DESPA F-92195 Meudon Cedex, France; and European Southern Observatory, Casilla 19001, Santiago 19, Chile

⁹ Guest Investigator, Las Campanas Observatory (LCO), which is operated by the Carnegie Institution of Washington

¹⁰ Visiting Astronomer, Cerro Tololo Inter-American Observatory (CTIO), Chile. CTIO is operated by AURA, Inc., under contract with the National Science Foundation

Dates

Received 2000 February 10
Accepted 2000 March 14

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Abstract

We report BV(RI)_C CCD photometric data for a group of seven Cepheid variables in the young, rich cluster NGC 1866 in the Large Magellanic Cloud. The photometry was obtained as part of a program to determine accurate distances to these Cepheids by means of the infrared surface brightness technique and to improve the LMC Cepheid database for constructing Cepheid P-L and P-L-C relations. Using the new data together with data from the literature, we have determined improved periods for all variables. For five fundamental mode pulsators, the light curves are now of excellent quality and will lead to accurate distance and radius determinations once complete infrared light curves and radial velocity curves for these variables become available.

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