The TESS-Keck Survey. XXII. A Sub-Neptune Orbiting TOI-1437

Abstract Exoplanet discoveries have revealed a dramatic diversity of planet sizes across a vast array of orbital architectures. Sub-Neptunes are of particular interest; due to their absence in our own solar system, we rely on demographics of exoplanets to better understand their bulk composition and formation scenarios. Here, we present the discovery and characterization of TOI-1437 b, a sub-Neptune with a 18.84 day orbit around a near-solar analog ( M ⋆ = 1.10 ± 0.10 M ☉ , R ⋆ =1.17 ± 0.12 R ☉ ). The planet was detected using photometric data from the Transiting Exoplanet Survey Satellite (TESS) mission and radial velocity (RV) follow-up observations were carried out as a part of the TESS-Keck Survey using both the HIRES instrument at Keck Observatory and the Levy Spectrograph on the Automated Planet Finder telescope. A combined analysis of these data reveal a planet radius of R p = 2.24 ± 0.23 R ⊕ and a mass measurement of M p = 9.6 ± 3.9 M ⊕ ). TOI-1437 b is one of few (∼50) known transiting sub-Neptunes orbiting a solar-mass star that has a RV mass measurement. As the formation pathway of these worlds remains an unanswered question, the precise mass characterization of TOI-1437 b may provide further insight into this class of planet.

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Publication Details

Journal
The Astronomical Journal
Published
2024-08-30
DOI
https://doi.org/10.3847/1538-3881/ad6901
Citations
1
Primary Topic
Stellar, planetary, and galactic studies
Type
article
Field-Weighted Citation Impact
0.33

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article

The TESS-Keck Survey. XXII. A Sub-Neptune Orbiting TOI-1437

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1 citations
The Astronomical Journal
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article

The TESS-Keck Survey. XXII. A Sub-Neptune Orbiting TOI-1437

J. Lillo-Box, Howard Isaacson, Jack Lubin, Andrew W. Mayo, Stephen R. Kane, Andrew W. Howard, Nicholas Scarsdale, Steven Giacalone, Andrew W. Boyle, Corey Beard, Dakotah Tyler, Malena Rice, Courtney D. Dressing, Michelle L. Hill, Daniel Huber, Ian J. M. Crossfield, Casey L. Brinkman, Daria Pidhorodetska, Steve B. Howell, Emily A. Gilbert, Benjamin J. Fulton, Aida Behmard, Erik A. Petigura, Sarah Blunt, Edward W. Schwieterman, Paul M. Robertson, Ashley Chontos, Thomas Barclay, Judah Van Zandt, Alex S. Polanski, Joseph M. Akana Murphy, Emma V. Turtelboom, David R. Ciardi, Ryan A. Rubenzahl, Mason G. MacDougall, Natalie M. Batalha, Isabel Angelo, Lauren M. Weiss, Rae Holcomb, Keivan G. Stassun, Paul A. Dalba, Tara Fetherolf, Fei Dai
article en
1 citations

Abstract

Abstract Exoplanet discoveries have revealed a dramatic diversity of planet sizes across a vast array of orbital architectures. Sub-Neptunes are of particular interest; due to their absence in our own solar system, we rely on demographics of exoplanets to better understand their bulk composition and formation scenarios. Here, we present the discovery and characterization of TOI-1437 b, a sub-Neptune with a 18.84 day orbit around a near-solar analog ( M ⋆ = 1.10 ± 0.10 M ☉ , R ⋆ =1.17 ± 0.12 R ☉ ). The planet was detected using photometric data from the Transiting Exoplanet Survey Satellite (TESS) mission and radial velocity (RV) follow-up observations were carried out as a part of the TESS-Keck Survey using both the HIRES instrument at Keck Observatory and the Levy Spectrograph on the Automated Planet Finder telescope. A combined analysis of these data reveal a planet radius of R p = 2.24 ± 0.23 R ⊕ and a mass measurement of M p = 9.6 ± 3.9 M ⊕ ). TOI-1437 b is one of few (∼50) known transiting sub-Neptunes orbiting a solar-mass star that has a RV mass measurement. As the formation pathway of these worlds remains an unanswered question, the precise mass characterization of TOI-1437 b may provide further insight into this class of planet.

The Astronomical JournalVol. 168(3)
University of California, Riverside (US), University of Notre Dame (US), Northwestern University (US), California Institute of Technology (US), Ames Research Center (US), The University of Sydney (AU), Goddard Space Flight Center (US), University of Hawaii System (US), Jet Propulsion Laboratory (US), American Museum of Natural History (US), University of Kansas (US), University of California, Los Angeles (US), University of California, Santa Cruz (US), University of Southern Queensland (AU), Vanderbilt University (US), Princeton University (US), University of California, Irvine (US), California State University, San Marcos (US), NASA Exoplanet Science Institute (US), Yale University (US), Centro de Astrobiología (ES), University of California, Berkeley (US)
National Science Foundation, National Aeronautics and Space Administration, Alfred P. Sloan Foundation, California Institute of Technology, Space Telescope Science Institute, Instituo Cajal, Nuclear Safety and Security Commission, Korea Astronomy and Space Science Institute, Ministerio de Ciencia e Innovación, Ministério da Ciência, Tecnologia, Inovações e Comunicações, Agencia Nacional de Investigación y Desarrollo, Ames Research Center, Jet Propulsion Laboratory, Australian Research Council, Agencia Estatal de Investigación, Planetary Science Division
Openalex Percentile: Top 35%
Stellar, planetary, and galactic studies
0.33
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