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Measuring Phase Errors in the Presence of Scintillation
Justin R. Crepp, Stanimir O. Letchev, Sam J. Potier +2
Strong turbulence conditions create amplitude aberrations through the effects of near-field diffraction. When integrated over long optical path lengths, amplitude aberrations (seen…
Final Design and On-Sky Testing of the iLocater SX Acquisition Camera: Broadband Single-Mode Fiber Coupling
Jonathan Crass, Andrew Bechter, Brian Sands +22
Enabling efficient injection of light into single-mode fibers (SMFs) is a key requirement in realizing diffraction-limited astronomical spectroscopy on ground-based telescopes. SMF…
The TRENDS High-contrast Imaging Survey. VIII. Compendium of Benchmark Objects
Erica J. Gonzales, Justin R. Crepp, Eric B. Bechter +5
The physical properties of faint stellar and substellar objects often rely on indirect, model-dependent estimates. For example, the masses of brown dwarfs are usually inferred usin…
EarthFinder Probe Mission Concept Study: Characterizing nearby stellar exoplanet systems with Earth-mass analogs for future direct imaging
Peter Plavchan, Gautam Vasisht, Chas Beichman +52
EarthFinder is a NASA Astrophysics Probe mission concept selected for study as input to the 2020 Astrophysics National Academies Decadal Survey. The EarthFinder concept is based on…
Dynamical masses for the Pleiades binary system HII-2147
Guillermo Torres, Carl Melis, Adam L. Kraus +3
We report our long-term spectroscopic monitoring of the Pleiades member HII-2147, which has previously been spatially resolved at radio wavelengths in VLBI observations. It has als…
Characterization of Single-Mode Fiber Coupling at the Large Binocular Telescope
Andrew J. Bechter, Jonathan Crass, Jonathan Tesch +2
Optimizing on-sky single-mode fiber (SMF) injection is an essential part of developing precise Doppler spectrometers and new astrophotonics technologies. We installed and tested a…