2021/01/19 by Benjamin A. Thompson, Benjamin Thompson, Peter M. Frinchaboy +2 · 15 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Binary number #Binary star #Cluster (spacecraft) #Initial mass function #Open cluster #Photometry (optics) #Star cluster #Stars #Stellar classification #Stellar, planetary, and galactic studies #astro-ph.GA #astro-ph.SR
paper · pdf · doi:10.3847/1538-3881/abde4c
published in The Astronomical Journal 161(4), 160 (Institute of Physics) · 22 pages, 21 figures, AJ accepted
arxiv created 2021/01/19 · openalex created_date 2021/02/01 · openalex publication_date 2021/03/03 · arxiv updated 2021/03/10 · openalex updated_date 2026/08/06
Abstract We introduce a new binary detection technique, Binary INformation from Open Clusters using SEDs (binocs) , which we show is able to determine reliable stellar multiplicity and masses over a much larger mass range than current approaches. This new technique determines accurate component masses of binary and single systems of the open clusters’ main sequence by comparing observed magnitudes from multiple photometric filters to synthetic star spectral energy distributions (SEDs), allowing us to systematically probe the binary population for low-mass stars in clusters for eight well-studied open clusters. We provide new deep, infrared photometric catalogs (1.2–8.0 μ m) for the key open clusters NGC 1960 (M36), NGC 2099 (M37), NGC 2420, and NGC 2682 (M67), using observations from NOAO/NEWFIRM and Spitzer/IRAC. Using these deep multiwavelength catalogs, the binocs method is applied to these clusters to determine accurate component masses for unresolved cluster binaries. We explore binary fractions as a function of cluster age, Galactic location, and metallicity.