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Full-Text Articles in Physical Sciences and Mathematics
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
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
Physics & Astronomy Faculty Works
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: …
A Disk-Based Dynamical Mass Estimate For The Young Binary Ak Sco, I. Czekala, S. M. Andrews, Eric L.N. Jensen, K. G. Stassun, G. Torres, D. J. Wilner
A Disk-Based Dynamical Mass Estimate For The Young Binary Ak Sco, I. Czekala, S. M. Andrews, Eric L.N. Jensen, K. G. Stassun, G. Torres, D. J. Wilner
Physics & Astronomy Faculty Works
We present spatially and spectrally resolved Atacama Large Millimeter/submillimeter Array (ALMA) observations of gas and dust in the disk orbiting the pre-main sequence (pre-MS) binary AK Sco. By forward-modeling the disk velocity field traced by CO J = 2-1 line emission, we infer the mass of the central binary, {M}*=2.49+/- 0.10 {M}☉ , a new dynamical measurement that is independent of stellar evolutionary models. Assuming the disk and binary are co-planar within ̃2°, this disk-based binary mass measurement is in excellent agreement with constraints from radial velocity monitoring of the combined stellar spectra. These ALMA results are …
Misaligned Protoplanetary Disks In A Young Binary Star System, Eric L.N. Jensen, R. L. Akeson
Misaligned Protoplanetary Disks In A Young Binary Star System, Eric L.N. Jensen, R. L. Akeson
Physics & Astronomy Faculty Works
Many extrasolar planets follow orbits that differ from the nearly coplanar and circular orbits found in our Solar System; their orbits may be eccentric or inclined with respect to the host star's equator, and the population of giant planets orbiting close to their host stars suggests appreciable orbital migration. There is at present no consensus on what produces such orbits. Theoretical explanations often invoke interactions with a binary companion star in an orbit that is inclined relative to the planet's orbital plane. Such mechanisms require significant mutual inclinations between the planetary and binary star orbital planes. The protoplanetary disks in …
Circumstellar Disks Around Binary Stars In Taurus, R. L. Akeson, Eric L.N. Jensen
Circumstellar Disks Around Binary Stars In Taurus, R. L. Akeson, Eric L.N. Jensen
Physics & Astronomy Faculty Works
We have conducted a survey of 17 wide (〉100 AU) young binary systems in Taurus with the Atacama Large Millimeter Array (ALMA) at two wavelengths. The observations were designed to measure the masses of circumstellar disks in these systems as an aid to understanding the role of multiplicity in star and planet formation. The ALMA observations had sufficient resolution to localize emission within the binary system. Disk emission was detected around all primaries and 10 secondaries, with disk masses as low as 10-4 M ☉. We compare the properties of our sample to the population of known disks …