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A Disk-Based Dynamical Constraint On The Mass Of The Young Binary Dq Tau, I. Czekala, S. M. Andrews, G. Torres, Eric L.N. Jensen, K. G. Stassun, D. J. Wilner, D. W. Latham

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We present new Atacama Large Millimeter/Submillimeter Array (ALMA) observations of CO J = 2-1 line emission from the DQ Tau circumbinary disk. These data are used to tomographically reconstruct the Keplerian disk velocity field in a forward-modeling inference framework, and thereby provide a dynamical constraint on the mass of the DQ Tau binary of {M}_*={1.27}_-0.27^+0.46 {M}_☉ . Those results are compared with an updated and improved orbital solution for this double-lined system based on long-term monitoring of its stellar radial velocities. Both of these independent dynamical constraints on the binary mass are in excellent agreement: …