10 papers
Visual Orbits of Spectroscopic Binaries with the CHARA Array. V. HD 210763 and HD 221950
Kathryn V. Lester, Josephine Singleton, Alexandra M. Twomey +16
We present the visual orbits and dynamical masses of two longer period spectroscopic binary stars, HD 210763 and HD 221950, using long baseline interferometry with the CHARA Array…
The Debris Disk Host Piscis Austrinus is a Rapidly Rotating Star Seen Nearly Pole-On
Colin Kane, Russel White, Jeremy Jones +6
Previous studies of Piscis Austrinus (PsA) have speculated that the narrow and saddle-like shapes of some of its weak metallic lines are a consequence of it being a rapidly ro…
The Solar Neighborhood LIV: 54 Orbits of M Dwarf Multiples within 30 Parsecs with Speckle Interferometry at SOAR
Eliot Halley Vrijmoet, Andrei Tokovinin, Todd J. Henry +3
We present 1066 speckle measurements of M dwarf multiples observed over 2021-2024, all taken with HRCam on the Southern Astrophysical Research 4.1 m telescope. Among these, 900 obs…
The Solar Neighborhood LV: Spectral Characterization of an Equatorial Sample of 580 K Dwarfs
Hodari-Sadiki Hubbard-James, Sebastian Carrazco-Gaxiola, Todd J. Henry +5
We present a spectroscopic characterization of 580 K dwarfs within 33 pc, observed with the CHIRON echelle spectrograph (R=80,000) on the SMARTS 1.5m telescope. This volume-limited…
TESS Investigation -- Demographics of Young Exoplanets (TI-DYE) IV: a Jovian radius planet orbiting a 34 Myr Sun-like star in the Vela association
Madyson G. Barber, Andrew W. Mann, Andrew Vanderburg +17
The discovery of infant (< 50 Myr), close-in (<30-day period) planets is vital in understanding the formation mechanisms that lead to the distribution of mature transiting planets…
The Solar Neighborhood. LV. M Dwarf Twin Binaries -- One in Five Twin Sibling Pairs Are Mismatched in Activity and/or Rotation
Andrew A. Couperus, Todd J. Henry, Aman Kar +3
We report on a study of 36 pairs of `twin' M dwarfs in wide binaries and assess how similarly the stars behave. Stars in each twin pair have BP, RP, , , and differing b…