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The TESS-Keck Survey. XVI. Mass Measurements for 12 Planets in Eight Systems
- Murphy, Joseph M Akana;
- Batalha, Natalie M;
- Scarsdale, Nicholas;
- Isaacson, Howard;
- Ciardi, David R;
- Gonzales, Erica J;
- Giacalone, Steven;
- Twicken, Joseph D;
- Dattilo, Anne;
- Fetherolf, Tara;
- Rubenzahl, Ryan A;
- Crossfield, Ian JM;
- Dressing, Courtney D;
- Fulton, Benjamin;
- Howard, Andrew W;
- Huber, Daniel;
- Kane, Stephen R;
- Petigura, Erik A;
- Robertson, Paul;
- Roy, Arpita;
- Weiss, Lauren M;
- Beard, Corey;
- Chontos, Ashley;
- Dai, Fei;
- Rice, Malena;
- Van Zandt, Judah;
- Lubin, Jack;
- Blunt, Sarah;
- Polanski, Alex S;
- Behmard, Aida;
- Dalba, Paul A;
- Hill, Michelle L;
- Rosenthal, Lee J;
- Brinkman, Casey L;
- Mayo, Andrew W;
- Turtelboom, Emma V;
- Angelo, Isabel;
- Močnik, Teo;
- MacDougall, Mason G;
- Pidhorodetska, Daria;
- Tyler, Dakotah;
- Kosiarek, Molly R;
- Holcomb, Rae;
- Louden, Emma M;
- Hirsch, Lea A;
- Gilbert, Emily A;
- Anderson, Jay;
- Valenti, Jeff A
- et al.
Abstract
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. Using a carefully curated target list and observations from more than 2 yr 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 (T eff = 5200-6200 K). 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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