Eclipsing Binaries in the Young LMC Cluster NGC 1850
arXiv:astro-ph/0410393 · doi:10.1086/426791
Abstract
I present light curves for two detached eclipsing binary stars in the region of the LMC cluster NGC 1850, which is possibly a young globular cluster still in formation. One, a likely spectral type O star, is a newly detected eclipsing binary in the region of the very young subcluster NGC 1850A. This binary is among a small number of highly massive O-type stars in binary systems found in LMC clusters. These two eclipsing binaries are the first discovered in the well studied NGC 1850, and the O-type star is the first eclisping binary found in NGC 1850A. Light curves for two NGC 1850 region Cepheid variables are also shown. Discovering two eclipsing binaries in the young globlular-like cluster NGC 1850 is discussed in terms of the importance of the binary fraction to globular cluster evolution.
arXiv comment27 pages, 11 figures; Accepted for publication in December 2004 PASP. (No changes in paper from original submitted version; only this comment reflecting acceptance by the Proceedings of the Astronomical Society of the Pacific has been added.)
References in corpus (18)
- A method for optimal image subtraction
- Internal Dynamics of Globular Clusters
- The Frequency of Binary Stars in the Core of 47 Tucanae
- Monte Carlo Simulations of Globular Cluster Evolution. III. Primordial Binary Interactions
- W UMa-type Binary Stars in Globular Clusters
- Fundamental Properties and Distances of LMC Eclipsing Binaries: IV. HV 5936
- A statistical study of binary and multiple clusters in the LMC
- Orbits of Four Very Massive Binaries in the R136 Cluster
- A Search for Planets in the Old Open Cluster NGC 6791
- CCD Photometry of Variable Stars in the Field of the Globular Cluster NGC 6397
- Image-Subtraction Photometry of Variable Stars in the Field of the Globular Cluster NGC 6934
- The Optical Gravitational Lensing Experiment. Variable Stars in Globular Clusters - II. Fields 5139D-F in Omega Centauri
- DIRECT Distances to Nearby Galaxies Using Detached Eclipsing Binaries and Cepheids. VII. Additional Variables in the Field M33A Discovered with Image Subtraction
- DIRECT Distances to Nearby Galaxies Using Detached Eclipsing Binaries and Cepheids. VIII. Additional Variables in the Field M33B Discovered with Image Subtraction
- Variable Stars in the Field of the Globular Cluster NGC 3201
- Re-analysis of VLT Data for M83 with Image Subtraction -- Nine-fold Increase in Number of Cepheids
- Searching for Variability in the Globular Cluster Messier 4
- A Search for Eclipsing Binaries in Galactic Globular Clusters