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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
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
Corresponding
E-mail address:
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Abstract

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.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2007

References

Alard, C. 2000, A & A 144, 363Google Scholar
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Stetson, P.B. 1994, PASP 106, 250CrossRefGoogle Scholar
Stetson, P.B. 1996, User's Manual for DAOPHOT IIGoogle Scholar

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