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K2 Discovery of Young Eclipsing Binaries in Upper Scorpius: Direct Mass and Radius Determinations for the Lowest Mass Stars and Initial Characterization of an Eclipsing Brown Dwarf Binary
Trevor J. David, Lynne A. Hillenbrand, Ann Marie Cody +2
We report the discovery of three low-mass double-lined eclipsing binaries in the pre-main sequence Upper Scorpius association, revealed by photometric monitoring of the region…
HII 2407: A Low-Mass Eclipsing Binary Revealed by K2 Observations of the Pleiades
Trevor J. David, John Stauffer, Lynne A. Hillenbrand +16
The star HII 2407 is a member of the relatively young Pleiades star cluster and was previously discovered to be a single-lined spectroscopic binary. It is newly identified here wit…
Near-Infrared Spectroscopy of 2M0441+2301 AabBab: A Quadruple System Spanning the Stellar to Planetary Mass Regimes
Brendan Bowler, Lynne Hillenbrand
We present Keck/NIRC2 and OSIRIS near-infrared imaging and spectroscopy of 2M0441+2301 AabBab, a young (1--3 Myr) hierarchical quadruple system comprising a low-mass star, two brow…
Tests of the planetary hypothesis for PTFO 8-8695b
Liang Yu, Joshua N. Winn, Michaël Gillon +16
The T Tauri star PTFO 8-8695 exhibits periodic fading events that have been interpreted as the transits of a giant planet on a precessing orbit. Here we present three tests of the…
CSI 2264: Accretion process in classical T Tauri stars in the young cluster NGC 2264
Alana Sousa, Silvia Alencar, Jérôme Bouvier +12
Our goal is to relate the photometric and spectroscopic variability of classical T Tauri stars, of the star-forming cluster NGC 2264, to the physical processes acting in the stella…
Dynamical Masses of Young M Dwarfs: Masses and Orbital Parameters of GJ 3305 AB, the Wide Binary Companion to the Imaged Exoplanet Host 51 Eri
Benjamin T. Montet, Brendan P. Bowler, Evgenya L. Shkolnik +7
We combine new high resolution imaging and spectroscopy from Keck/NIRC2, Discovery Channel Telescope/DSSI, and Keck/HIRES with published astrometry and radial velocities to measure…