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astro-ph.EP2025
Precise Radial Velocities
Jennifer A. Burt, Xavier Dumusque, Samuel Halverson
Precise measurements of a star's radial velocity (RV) made using extremely stable, high resolution, optical or near infrared spectrographs can be used to determine the masses and o…
astro-ph.EP2025
The KPF SURFS-UP Survey I: Transmission Spectroscopy of WASP-76 b
Aaron Householder, Fei Dai, Aurora Kesseli +25
We introduce the KPF SURFS-UP (Spectroscopy of the Upper-atmospheres and ReFractory Species in Ultra-hot Planets) Survey, a high-resolution survey to investigate the atmospheric co…
astro-ph.EP2025
An Hα Transit of HD 189733b to Assess Stellar Activity Across the Transit Chord Close to JWST Observations
Kingsley E. Ehrich, Jason A. Dittmann, Samuel P. Halverson +1
Transmission spectroscopy allows us to detect molecules in planetary atmospheres, but is subject to contamination from inhomogeneities on the stellar surface. Quantifying the exten…