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Kepler-11 is a Solar Twin: Revising the Masses and Radii of Benchmark Planets Via Precise Stellar Characterization
Megan Bedell, Jacob L. Bean, Jorge Melendez +7
The six planets of the Kepler-11 system are the archetypal example of a population of surprisingly low-density transiting planets revealed by the Kepler mission. We have determined…
The Solar Twin Planet Search. V. Close-in, low-mass planet candidates and evidence of planet accretion in the solar twin HIP 68468
Jorge Melendez, Megan Bedell, Jacob L. Bean +14
[Methods]. We obtained high-precision radial velocities with HARPS on the ESO 3.6 m telescope and determined precise stellar elemental abundances (~0.01 dex) using MIKE spectra on…
Spitzer Phase Curve Constraints for WASP-43b at 3.6 and 4.5 microns
Kevin B. Stevenson, Michael R. Line, Jacob L. Bean +6
Previous measurements of heat redistribution efficiency (the ability to transport energy from a planet's highly irradiated dayside to its eternally dark nightside) show considerabl…
The Impact of Non-Uniform Thermal Structure on the Interpretation of Exoplanet Emission Spectra
Y. Katherina Feng, Michael R. Line, Jonathan J. Fortney +4
The determination of atmospheric structure and molecular abundances of planetary atmospheres via spectroscopy involves direct comparisons between models and data. While varying in…
Optimal non-circular fiber geometries for image scrambling in high-resolution spectrographs
Julian Stürmer, Christian Schwab, Stephan Grimm +6
Optical fibers are a key component for high-resolution spectrographs to attain high precision in radial velocity measurements. We present a custom fiber with a novel core geometry…
Characterizing octagonal and rectangular fibers for MAROON-X
Adam P. Sutherland, Julian Stürmer, Katrina R. Miller +2
We report on the scrambling performance and focal-ratio-degradation (FRD) of various octagonal and rectangular fibers considered for MAROON-X. Our measurements demonstrate the detr…