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A Dearth of Close-In Stellar Companions to M-dwarf TESS Objects of Interest
Catherine A. Clark, Gerard T. van Belle, David R. Ciardi +5
TESS has proven to be a powerful resource for finding planets, including those that orbit the most prevalent stars in our galaxy: the M dwarfs. Identification of stellar companions…
Speckle Observations of TESS Exoplanet Host Stars. II. Stellar Companions at 1-1000 AU and Implications for Small Planet Detection
Kathryn V. Lester, Rachel A. Matson, Steve B. Howell +7
We present high angular resolution imaging observations of 517 host stars of TESS exoplanet candidates using the `Alopeke and Zorro speckle cameras at Gemini North and South. The s…
Observations with the Differential Speckle Survey Instrument. X. Preliminary Orbits of K Dwarf Binaries and Other Stars
Elliott P. Horch, Kyle G. Broderick, Dana I. Casetti-Dinescu +8
This paper details speckle observations of binary stars taken at the Lowell Discovery Telescope, the WIYN Telescope, and the Gemini telescopes between 2016 January and 2019 Septemb…
Speckle observations and orbits of multiple stars
Andrei Tokovinin, Mark E. Everett, Elliott P. Horch +2
We report results of speckle-interferometric monitoring of visual hierarchical systems using the newly commissioned instrument NESSI at the 3.5-m WIYN telescope. During one year, 3…
Discovery of a Compact Companion to a Nearby Star
Stephen R. Kane, Paul A. Dalba, Jonathan Horner +5
Radial velocity (RV) searches for exoplanets have surveyed many of the nearest and brightest stars for long-term velocity variations indicative of a companion body. Such surveys of…
Observations of Binary Stars with the Differential Speckle Survey Instrument. VIII. Measures of Metal-Poor Stars and Triple Stars from 2015 to 2018
Elliott P. Horch, Andrei Tokovinin, Samuel A. Weiss +15
We present 248 speckle observations of 43 binary and 19 trinary star systems chosen to make progress in two main areas of investigation: the fundamental properties of metal poor st…