A Search for EHB Pulsators in the Globular Cluster NGC 6752
M. Catelan, G. E. Prieto, M. Zoccali, C. Weidner (PUC-Chile), P. B., Stetson (DAO/HIA), C. Moni Bidin, M. Altmann (Univ. Chile), H. A. Smith, (Michigan State), B. J. Pritzl (UW Oshkosh), J. Borissova (UV), J. R. De, Medeiros (UFRN)
TL;DR
This study aims to detect extreme horizontal branch pulsators in NGC 6752 using Magellan data, presenting preliminary light curves and a high-quality CMD that suggests a low binary fraction among cluster stars.
Contribution
It provides the first detailed variability search for EHB stars in NGC 6752 and offers a high-quality CMD revealing a low binary fraction in the cluster.
Findings
Preliminary light curves for candidate variables are presented.
A deep, high-quality CMD shows a lack of main sequence binaries.
Results suggest a low primordial binary fraction in NGC 6752.
Abstract
We describe the status of a project whose main goal is to detect variability along the extreme horizontal branch of the globular cluster NGC 6752. Based on Magellan 6.5m data, preliminary light curves are presented for some candidate variables. By combining our time-series data, we also produce a deep CMD of unprecedented quality for the cluster which reveals a remarkable lack of main sequence binaries, possibly pointing to a low primordial binary fraction.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Astronomical Observations and Instrumentation