Variable Stars in Large Magellanic Cloud Globular Clusters I: NGC 1466

Abstract

This is the first in a series of papers studying the variable stars in Large Magellanic Cloud globular clusters. The primary goal of this series is to better understand how the RR Lyrae stars in Oosterhoff-intermediate systems compare to those in Oosterhoff I/II systems. In this paper we present the results of our new time-series BV photometric study of NGC 1466. A total of 62 variables were identified in the cluster, of which 16 are new discoveries. The variables include 30 RRab stars, 11 RRc's, 8 RRd's, 1 candidate RR Lyrae, 2 long-period variables, 1 potential anomalous Cepheid, and 9 variables of undetermined classification. We present photometric parameters for these variables. For the RR Lyrae stars physical properties derived from Fourier analysis of their light curves are presented. The RR Lyrae stars were used to determine a reddening-corrected distance modulus of (m-M)0 = 18.43 +/- 0.15. We discuss several different indicators of Oosterhoff type and find NGC 1466 to be an Oosterhoff-intermediate object.

14 pages, 11 figures, accepted by AJ

References in corpus (2)

• Evidence for an Overluminosity of the Variable Star RR Lyr, and a Revised Distance to the LMC
• Ages and Metallicities of Extragalactic Globular Clusters from Spectral and Photometric Fits of Stellar Population Synthesis Models

Cited by in corpus (8)

• The RR Lyrae variables and Horizontal Branch of NGC6656 (M22)
• La Silla QUEST RR Lyrae Star Survey: Region I
• Anomalous Cepheids in the Large Magellanic Cloud: Insight into their origin and connection with the star formation history
• The ISLAnds Project III: Variable Stars in Six Andromeda Dwarf Spheroidal Galaxies
• Variable Stars in Large Magellanic Cloud Globular Clusters III: Reticulum
• Variable stars in the globular cluster M28 (NGC 6626)
• Variable Stars in Large Magellanic Cloud Globular Clusters II: NGC 1786
• RR Lyrae Stars in Intermediate-age Magellanic Clusters: Membership Probabilities and Delay Time Distribution