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Estimating the Convective Turnover Time
Wei-Chun Jao, Andrew A Couperus, Eliot H. Vrijmoet +2
The introduction of the Rossby number (R), which incorporates the convective turnover time (), in 1984 was a pioneering idea for understanding the correlation between stella…
The Solar Neighborhood L: Spectroscopic Discovery of K Dwarfs Younger Than 1 Gyr and New Binaries within 30 pc
Hodari-Sadiki Hubbard-James, D. Xavier Lesley, Todd J. Henry +2
As part of a comprehensive effort to characterize the nearest stars, the CHIRON echelle spectrograph on the CTIO/SMARTS 1.5m telescope is being used to acquire high resolution (R =…
Visual Orbits of Spectroscopic Binaries with the CHARA Array. IV. HD 61859, HD 89822, HD 109510, and HD 191692
Kathryn V. Lester, Gail H. Schaefer, Francis C. Fekel +18
We present the visual orbits of four spectroscopic binary stars, HD 61859, HD 89822, HD 109510, and HD 191692, using long baseline interferometry with the CHARA Array. We also obta…
An Adaptive Optics Census of Companions to Northern Stars Within 25 pc with Robo-AO
Maissa Salama, Carl Ziegler, Christoph Baranec +8
In order to assess the multiplicity statistics of stars across spectral types and populations in a volume-limited sample, we censused nearby stars for companions with Robo-AO. We r…
The Solar Neighborhood XLIX: New Discoveries and Orbits of M Dwarf Multiples with Speckle Interferometry at SOAR
Eliot Halley Vrijmoet, Andrei Tokovinin, Todd J. Henry +3
We present the first results of a multi-year program to map the orbits of M dwarf multiples within 25 parsecs. The observations were conducted primarily during 2019 - 2020 using sp…