2018/02/08 by G. H. Schaefer, L. Prato, M. Simon
Physics and Astronomy · #Astrometry #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Binary number #Binary star #Ophiuchus #Orbital elements #Orbital mechanics #Orbital motion #Position (finance) #Stars #Stellar, planetary, and galactic studies #astro-ph.SR
paper · pdf · doi:10.3847/1538-3881/aaa59a
22 pages, 22 figures, 4 tables, accepted for publication in AJ
arxiv created 2018/02/08 · openalex publication_date 2018/02/08 · arxiv updated 2018/02/21 · openalex created_date 2018/02/23 · openalex updated_date 2026/08/06
Abstract We present measurements of the orbital positions and flux ratios of 17 binary and triple systems in the Ophiuchus star-forming region and the Upper Centaurus–Lupus cluster based on adaptive optics imaging at the Keck Observatory. We report the detection of visual companions in MML 50 and MML 53 for the first time, as well as the possible detection of a third component in WSB 21. For six systems in our sample, our measurements provide a second orbital position following their initial discoveries over a decade ago. For eight systems with sufficient orbital coverage, we analyze the range of orbital solutions that fit the data. Ultimately, these observations will help provide the groundwork toward measuring precise masses for these pre-main-sequence stars and understanding the distribution of orbital parameters in young multiple systems.