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Magnetic Inflation and Stellar Mass. V. Intensification and saturation of M dwarf absorption lines with Rossby number
Philip S. Muirhead, Mark J. Veyette, Elisabeth R. Newton +2
In young sun-like stars and field M dwarf stars, chromospheric and coronal magnetic activity indicators such as H, X-ray and radio emission are known to saturate with low Rossby…
Upper Limits on Planet Occurrence around Ultracool Dwarfs with K2
Sheila A. Sagear, Julie N. Skinner, Philip S. Muirhead
The occurrence of planets orbiting ultracool dwarfs is poorly constrained. We present results from a Guest Observer program on NASA's K2 spacecraft to search for transiting planets…
The Effects of Telluric Contamination in Iodine Calibrated Precise Radial Velocities
Sharon Xuesong Wang, Jason T. Wright, Chad Bender +4
We characterized the effects of telluric absorption lines on the radial velocity (RV) precision of stellar spectra taken through an iodine cell. To isolate the effects induced by t…
Design Considerations for a Ground-Based Search for Transiting Planets around L and T Dwarfs
Patrick Tamburo, Philip S. Muirhead
We present design considerations for a ground-based survey for transiting exoplanets around L and T dwarfs, spectral classes that have yet to be thoroughly probed for planets. We s…
Three Red Suns in the Sky: A Transiting, Terrestrial Planet in a Triple M Dwarf System at 6.9 Parsecs
Jennifer G. Winters, Amber A. Medina, Jonathan M. Irwin +40
We present the discovery from TESS data of LTT 1445Ab. At a distance of 6.9 parsecs, it is the second nearest transiting exoplanet system found to date, and the closest one known f…
Magnetic Inflation and Stellar Mass IV. Four Low-mass Kepler Eclipsing Binaries Consistent with Non-magnetic Stellar Evolutionary Models
Eunkyu Han, Philip S. Muirhead, Jonathan J. Swift
Low-mass eclipsing binaries show systematically larger radii than model predictions for their mass, metallicity and age. Prominent explanations for the inflation involve enhanced m…