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The NGC 2419 project: preliminary results on stellar variability

Published online by Cambridge University Press:  01 December 2006

M. Di Criscienzo ,
C. Greco ,
M. Dall'Ora ,
V. Ripepi ,
G. Clementini ,
I. Musella ,
M. Marconi ,
L. Federici ,
L. Di Fabrizio  and
Baldacci
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M. Di Criscienzo
Affiliation:
INAF–Osservatorio Astronomico di Capodimonte, Napoli, Italy email: dicrisci@na.astro.it
C. Greco
Affiliation:
INAF–Osservatorio Astronomico di Bologna, Italy
M. Dall'Ora
Affiliation:
INAF–Osservatorio Astronomico di Capodimonte, Napoli, Italy email: dicrisci@na.astro.it
V. Ripepi
Affiliation:
INAF–Osservatorio Astronomico di Capodimonte, Napoli, Italy email: dicrisci@na.astro.it
G. Clementini
Affiliation:
INAF–Osservatorio Astronomico di Bologna, Italy
I. Musella
Affiliation:
INAF–Osservatorio Astronomico di Capodimonte, Napoli, Italy email: dicrisci@na.astro.it
M. Marconi
Affiliation:
INAF–Osservatorio Astronomico di Capodimonte, Napoli, Italy email: dicrisci@na.astro.it
L. Federici
Affiliation:
INAF–Osservatorio Astronomico di Bologna, Italy
L. Di Fabrizio
Affiliation:
INAF–Osservatorio Astronomico di Bologna, Italy
Baldacci
Affiliation:
INAF–Osservatorio Astronomico di Bologna, Italy
M. Maio
Affiliation:
INAF–Osservatorio Astronomico di Bologna, Italy
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Abstract

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We have combined B, V, I time-series photometry from three different telescopes (SUBARU, TNG and HST) to study the variable star population of the remote Galactic globular cluster NGC 2419 and derive hints on a possible extragalactic origin for this cluster. We have discovered 40 new variables (34 RR Lyrae stars, 3 SX Phoenicis stars, Scuti 1 eclipsing binary system and 2 red irregular variables) doubling the number of known variable stars in NGC 2419.

Keywords

(Galaxy:) globular clusters: individual (NGC 2419)stars: variables: other
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S241: Stellar Populations as Building Blocks of Galaxies , December 2006 , pp. 243 - 244
Copyright
Copyright © International Astronomical Union 2007

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