The TESS-Keck Survey. XII. A Dense 1.8 R⊕ Ultra-short-period Planet Possibly Clinging to a High-mean-molecular-weight Atmosphere after the First Gigayear

Copyright and License

© 2024. The Author(s). Published by the American Astronomical Society. 

Acknowledgement

Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. Keck Observatory occupies the summit of Maunakea, a place of significant ecological, cultural, and spiritual importance within the indigenous Hawaiian community. We understand and embrace our accountability to Maunakea and the indigenous Hawaiian community, and commit to our role in long-term mutual stewardship. We are most fortunate to have the opportunity to conduct observations from Maunakea.

This paper made use of data collected by the TESS mission and are publicly available from the Mikulski Archive for Space Telescopes (MAST) operated by the Space Telescope Science Institute (STScI). All the TIC data used in this paper can be found in MAST in the TESS Input Catalog and Candidate Target List (STScI 2018). All the TESS data used in this paper from the TESS Light Curves—All Sectors page in MAST (MAST 2021). Data from the NASA Exoplanet Archive (NASA Exoplanet Archive 2023) can be found via its doi:10.26133/NEA1 Funding for the TESS mission is provided by NASA's Science Mission Directorate. We acknowledge the use of public TESS data from pipelines at the TESS Science Office and at the TESS Science Processing Operations Center. This work is based also on observations made with the Italian Telescopio Nazionale Galileo (TNG) operated on the island of La Palma by the Fundación Galileo Galilei of the INAF (Istituto Nazionale di Astrofisica) at the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias. Some of the observations in this paper made use of the High-Resolution Imaging instrument 'Alopeke. 'Alopeke was funded by the NASA Exoplanet Exploration Program and built at the NASA Ames Research Center by Steve B. Howell, Nic Scott, Elliott P. Horch, and Emmett Quigley. 'Alopeke was mounted on the Gemini North telescope of the international Gemini Observatory, a program of NSF's NOIRLab, which is managed by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the National Science Foundation.

We thank the time assignment committees of the University of California, the California Institute of Technology, NASA, and the University of Hawaii for supporting the TESS-Keck Survey with observing time at Keck Observatory and on the Automated Planet Finder. We thank NASA for funding associated with our Key Strategic Mission Support project. We gratefully acknowledge the efforts and dedication of the Keck Observatory staff for support of HIRES and remote observing.

R.A.R. acknowledges support from the National Science Foundation through the Graduate Research Fellowship Program (DGE 1745301). M.R. acknowledges support from Heising-Simons grant #2023-4478. D.H. acknowledges support from the Alfred P. Sloan Foundation, the National Aeronautics and Space Administration (80NSSC21K0652) and the Australian Research Council (FT200100871)

Facilities

Keck I - KECK I Telescope, TESS - , TNG - Telescopio Nazionale Galileo, Gemini Gillett - Gillett Gemini North Telescope

Software References

astropy (Astropy Collaboration et al. 2013, 2018, 2022), corner (Foreman-Mackey 2016), exoplanet (Foreman-Mackey et al. 2021), FASMA (Tsantaki et al. 2020), lightkurve (Lightkurve Collaboration et al. 2018), matplotlib (Hunter 2007), numpy (Harris et al. 2020), pandas (Pandas development team 2020), radvel (Fulton et al. 2018), scipy (Virtanen et al. 2020), SpecMatch-Synth (Petigura 2015), spinspotter(Holcomb et al. 2022)