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A Model-independent Mass and Moderate Eccentricity for β Pic b
Kratter, Kaitlin M.; Dupuy, Trent J.; Bowler, Brendan P. +1 more
We use a cross-calibration of Hipparcos and Gaia second data release astrometry for β Pic to measure the mass of the giant planet β Pic b (13 ± 3 {M}Jup}) in a comprehensive joint orbit analysis that includes published relative astrometry and radial velocities. Our mass uncertainty is somewhat higher than previous work because our astro…
Dynamical Masses for the Triple System HD 28363 in the Hyades Cluster
Torres, Guillermo; Latham, David W.; Stefanik, Robert P.
The star HD 28363 in the Hyades cluster has been known for over a century as a visual binary with a period of 40 yr. The secondary is, in turn, a single-lined spectroscopic binary with a 21 day period. Here we report extensive spectroscopic monitoring of this hierarchical triple system that reveals the spectral lines of the third star for the firs…
Dynamical Masses for the Hyades Binary 80 Tauri
Torres, Guillermo
The empirical mass-luminosity relation in the Hyades cluster rests on dynamical mass determinations for five binary systems, of which one is eclipsing and the other four are visual or interferometric binaries. The last one was identified and first measured more than 20 yr ago. Here we present dynamical mass measurements for a new binary system in …