Orbital Motion of Young Binaries in Ophiuchus and Upper Centaurus-Lupus

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.

22 pages, 22 figures, 4 tables, accepted for publication in AJ

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Cited by in corpus (12)

• The Degree of Alignment Between Circumbinary Disks and Their Binary Hosts
• Masses and Implications for Ages of Low-Mass Pre-Main Sequence Stars in Taurus and Ophiuchus
• Hints for icy pebble migration feeding an oxygen-rich chemistry in the inner planet-forming region of disks
• The Gaia reference frame for bright sources examined using VLBI observations of radio stars
• Rotation Periods, Inclinations, and Obliquities of Cool Stars Hosting Directly Imaged Substellar Companions: Spin-Orbit Misalignments are Common
• The Ophiuchus DIsc Survey Employing ALMA (ODISEA). II. The effect of stellar multiplicity on disc properties
• The SPHERE view of three interacting twin disc systems in polarised light
• On the frequencies of circumbinary discs in protostellar systems
• S and VV Corona Australis: Spectroscopic Variability in Two Young Binary Star Systems
• SUBARU Near-Infrared Imaging Polarimetry of Misaligned Disks Around The SR24 Hierarchical Triple System
• Fundamental properties of the pre-main sequence eclipsing stars of MML 53 and the mass of the tertiary
• The SPHERE view of multiple star formation