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Near-Infrared photometry of the Galactic Globular Cluster NGC 6441

Published online by Cambridge University Press:  01 December 2006

M. Dall'Ora ,
J. Storm ,
G. Bono ,
P. B. Stetson ,
G. Andreuzzi ,
R. Buonanno ,
F. Caputo ,
M. Marconi ,
M. Monelli  and
A. Piersimoni
...Show all authors
M. Dall'Ora
Affiliation:
INAF – Osservatorio Astronomico di Capodimonte, via Moiariello 16, I-80131, Napoli, Italy, email: dallora@oacn.inaf.it, marconi@oacn.inaf.it, ripepi@oacn.inaf.it
J. Storm
Affiliation:
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany, email: jstorm@aip.de
G. Bono
Affiliation:
INAF, Osservatorio Astronomico di Roma, Via Frascati 33, 00040, Monte Porzio Catone, email: bono@mporzio.astro.it, caputo@mporzio.astro.it
P. B. Stetson
Affiliation:
Dominion Astrophysical Observatory, Herzberg Institute of Astrophysics, National Research Council, 5071 West Saanich Road, Victoria, BC V9E 2E7, Canada, email: Peter.Stetson@nrc-cnrc.gc.ca
G. Andreuzzi
Affiliation:
INAF, Centro Galileo Galilei and Telescopio Nazionale Galileo, P.O. Box 565, 38700 Santa Cruz de La Palma, Spain, email: andreuzzi@tng.iac.es
R. Buonanno
Affiliation:
Universit di Roma Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy, email: buonanno@mporzio.astro.it
F. Caputo
Affiliation:
INAF, Osservatorio Astronomico di Roma, Via Frascati 33, 00040, Monte Porzio Catone, email: bono@mporzio.astro.it, caputo@mporzio.astro.it
M. Marconi
Affiliation:
INAF – Osservatorio Astronomico di Capodimonte, via Moiariello 16, I-80131, Napoli, Italy, email: dallora@oacn.inaf.it, marconi@oacn.inaf.it, ripepi@oacn.inaf.it
M. Monelli
Affiliation:
Instituto de Astrofisica de Canarias, Calle Via Lactea, E38200 La Laguna, Tenerife, Spain, email: monelli@iac.es
A. Piersimoni
Affiliation:
INAF, Osservatorio Astronomico di Collurania, via M. Maggini, 64100 Teramo, Italy; piersimoni@oa-teramo.inaf.it
V. Ripepi
Affiliation:
INAF – Osservatorio Astronomico di Capodimonte, via Moiariello 16, I-80131, Napoli, Italy, email: dallora@oacn.inaf.it, marconi@oacn.inaf.it, ripepi@oacn.inaf.it
L. Vanzi
Affiliation:
European Southern Observatory, Alonso de Cordova 3107, Vitacura, Santiago, Chile, email: lvanzi@eso.org
A. K. Vivas
Affiliation:
Centro de Investigaciones de Astronoma, Apartado Postal 264, Merida 5101-A, Venezuela, email: akvivas@cida.ve
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Abstract

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We present new near-infrared Ks photometry of the interesting Galactic globular cluster NGC 6441. The optical-NIR color-magnitude diagram shows evolutionary features that seem to agree with a canonical evolutionary framework. The K-band Period-Luminosity-Metallicity relation of RR Lyrae stars gives a distance estimate of 15.51±0.07 that is slightly larger previous estimates.

Keywords

(Galaxy:) globular clusters: individual (NGC 6441) – stars: horizontal-branch – stars: variables: other – techniques: photometric
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S241: Stellar Populations as Building Blocks of Galaxies , December 2006 , pp. 241 - 242
Copyright
Copyright © International Astronomical Union 2007

References

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