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On the discrete nature of the red giant branch of ω Centauri

On the discrete nature of the RGB of ω Cen

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 12 Jan 2005Embargo end date: 01 Jan 2004 Italy Publisher:Oxford University Press (OUP)Journal:Monthly Notices of the Royal Astronomical Society, volume 357, pages 265-274 (issn: 0035-8711,

Authors: SOLLIMA, ANTONIO; FERRARO, FRANCESCO ROSARIO; Pancino E.; Bellazzini M.;

doi: 10.1111/j.1365-2966.2005.08646.x , 10.48550/arxiv.astro-ph/0411546 , 10.1111/j.1365-2966.2005.08646.x/abs/

arXiv: http://arxiv.org/abs/astro-ph/0411546

handle: 11585/19567

On the discrete nature of the red giant branch of ω Centauri

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Abstract

We report the results of an extensive VLT high-resolution imaging campaign of the central region of the giant globular cluster omega Centauri. More than 100,000 stars have been measured in the inner 9'x 9' region of the cluster. On the basis of multiband Colour Magnitude Diagrams (CMD), we confirm the existence of multiple stellar populations along the Red Giant Branch (RGB). Moreover, thanks to the high-precision of this dataset, we conclude that the RGB does not present a smooth and continuous distribution, but shows a discrete structure: besides the metal-poor and the extreme metal-rich population (RGB-a), the existence of three metal intermediate populations is shown.

11 pages, 13 figures, accepted by MNRAS

Country

Italy

Related Organizations

Alma Mater Studiorum University of Bologna
Italy

Keywords

Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics

1 Research products, page 1 of 1

BVI photometry of omega Cen red giants
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