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Table · dataset · 2024

TESS-Keck Survey. XVI. 8 systems Radial velocity

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With JWST's successful deployment and unexpectedly high fuel reserves, measuring the masses of sub-Neptunes transiting bright, nearby stars will soon become the bottleneck for characterizing the atmospheres of small exoplanets via transmission spectroscopy.

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Using a carefully curated target list and observations from more than 2yr of APF-Levy and Keck-HIRES Doppler monitoring, the TESS-Keck Survey is working toward alleviating this pressure.

Here we present mass measurements for 11 transiting planets in eight systems that are particularly suited to atmospheric follow-up with JWST. We also report the discovery and confirmation of a temperate super-Jovian-mass planet on a moderately eccentric orbit. The sample of eight host stars, which includes one subgiant, spans early-K to late-F spectral types (Teff=5200-6200K).

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We homogeneously derive planet parameters using a joint photometry and radial velocity modeling framework, discuss the planets possible bulk compositions, and comment on their prospects for atmospheric characterization.

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