2006/12/31 by Frantz Martinache, James P. Lloyd, Michael J. Ireland +4 · 38 citations
Mathematics · Physics and Astronomy · #Acoustics #Adaptive optics #Adaptive optics and wavefront sensing #Aperture (computer memory) #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Binary number #Binary star #Binary system #Interferometry #Low Mass #Mass ratio #Mathematics #Physics #Radial velocity #Stars #Stellar, planetary, and galactic studies #Telescope #astro-ph
paper · pdf · doi:10.1086/513868
published in The Astrophysical Journal 661(1), 496-501 (IOP Publishing) · 7 pages, 5 figures. Accepted for ApJ
arxiv created 2007/02/08 · openalex publication_date 2007/05/11 · arxiv updated 2011/02/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We have used aperture masking interferometry and adaptive optics (AO) at the Palomar 200 inch telescope to obtain precise mass measurements of the binary M dwarf GJ 623. AO observations spread over 3 yr combined with a decade of radial velocity measurements constrain all orbital parameters of the GJ 623 binary system accurately enough to critically challenge the models. The dynamical masses measured are m 1 = 0.371 ± 0.015 M ☉ (4%) and m 2 = 0.115 ± 0.0023 M ☉ (2%) for the primary and the secondary, respectively. Models are not consistent with color and mass, requiring very low metallicities.