This article has an erratum: [https://doi.org/10.1051/0004-6361/20030944e]
Volume 421, Number 2, July II 2004
|Page(s)||667 - 672|
|Section||Galactic structure, stellar clusters, and populations|
|Published online||22 June 2004|
Discovery of a variable star population in NGC 2808
Department of Physics, University of North Carolina at Charlotte, Charlotte, NC 28223, USA e-mail: email@example.com
2 Pontificia Universidad Católica de Chile, Departamento de Astronomía y Astrofísica, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile e-mail: [mcatelan;jborisso]@astro.puc.cl
3 Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA e-mail: firstname.lastname@example.org
Corresponding author: M. Catelan, email@example.com
Accepted: 14 April 2004
We have applied the image subtraction method to images of the peculiar, bimodal-horizontal branch globular cluster NGC 2808, taken over a total of six nights over a range of five months. As a result, we have found, for the first time, a sizeable population of variable stars in the crowded inner regions of the cluster, thus raising the known RR Lyrae population in the cluster to a total of 18 stars. In addition, an eclipsing binary and two other variables with periods longer than 1 day were also found. Periods, positions and (differential) light curves are provided for all the detected variables. The Oosterhoff classification of NGC 2808, which has recently been associated with a previously unknown dwarf galaxy in Canis Major, is briefly discussed.
Key words: Galaxy: globular clusters: individual: NGC 2808 / stars: horizontal-branch / stars: variables: RR Lyr
© ESO, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.