The TESS-Keck Survey. XVIII. A Sub-Neptune and Spurious Long-period Signal in the TOI-1751 System
Article
Desai, Anmol, Turtelboom, Emma V., Harada, Caleb K., Dressing, Courtney D., Rice, David R., Akana Murphy, Joseph M., Brinkman, Casey L., Chontos, Ashley, Crossfield, Ian J. M., Dai, Fei, Hill, Michelle L., Fetherolf, Tara, Giacalone, Steven, Howard, Andrew W., Huber, Daniel, Isaacson, Howard, Kane, Stephen R., Lubin, Jack, MacDougall, Mason G., ..., Winn, Joshua N.. 2024. "The TESS-Keck Survey. XVIII. A Sub-Neptune and Spurious Long-period Signal in the TOI-1751 System." The Astronomical Journal. 167 (5). https://doi.org/10.3847/1538-3881/ad29ee
Article Title | The TESS-Keck Survey. XVIII. A Sub-Neptune and Spurious Long-period Signal in the TOI-1751 System |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Desai, Anmol, Turtelboom, Emma V., Harada, Caleb K., Dressing, Courtney D., Rice, David R., Akana Murphy, Joseph M., Brinkman, Casey L., Chontos, Ashley, Crossfield, Ian J. M., Dai, Fei, Hill, Michelle L., Fetherolf, Tara, Giacalone, Steven, Howard, Andrew W., Huber, Daniel, Isaacson, Howard, Kane, Stephen R., Lubin, Jack, MacDougall, Mason G., Mayo, Andrew W., Mocnik, Teo, Polanski, Alex S., Rice, Malena, Robertson, Paul, Rubenzahl, Ryan A., Van Zandt, Judah, Weiss, Lauren M., Bieryla, Allyson, Buchhave, Lars A., Jenkins, Jon M., Kostov, Veselin B., Levine, Alan M, Lillo-Box, Jorge, Paegert, M., Rabus, Markus, Seager, S., Stassun, Keivan G., Ting, Eric B., Watanabe, David and Winn, Joshua N. |
Journal Title | The Astronomical Journal |
Journal Citation | 167 (5) |
Article Number | 194 |
Number of Pages | 18 |
Year | 2024 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/ad29ee |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/ad29ee |
Abstract | We present and confirm TOI-1751 b, a transiting sub-Neptune orbiting a slightly evolved, solar-type, metal-poor star (T eff = 5996 ± 110 K, log ( g ) = 4.2 ± 0.1 , V = 9.3 mag, [Fe/H] = ?0.40 ± 0.06 dex) every 37.47 days. We use TESS photometry to measure a planet radius of 2.77 ? 0.07 + 0.15 R ? . We also use both Keck/HIRES and APF/Levy radial velocities (RV) to derive a planet mass of 14.5 ? 3.14 + 3.15 M ? , and thus a planet density of 3.6 ± 0.9 g cm?3. There is also a long-period (?400 days) signal that is observed in only the Keck/HIRES data. We conclude that this long-period signal is not planetary in nature and is likely due to the window function of the Keck/HIRES observations. This highlights the role of complementary observations from multiple observatories to identify and exclude aliases in RV data. Finally, we investigate the potential compositions of this planet, including rocky and water-rich solutions, as well as theoretical irradiated ocean models. TOI-1751 b is a warm sub-Neptune with an equilibrium temperature of ?820 K. As TOI-1751 is a metal-poor star, TOI-1751 b may have formed in a water-enriched formation environment. We thus favor a volatile-rich interior composition for this planet. |
Keywords | Transit photometry; Mini Neptunes; Radial velocity; Exoplanet structure |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 5101. Astronomical sciences |
Byline Affiliations | University of California Berkeley, United States |
Open University of Israel, Israel | |
University of California Santa Cruz, United States | |
University of Hawaii, United States | |
Princeton University, United States | |
University of Kansas, United States | |
California Institute of Technology (Caltech), United States | |
University of California Riverside, United Sates | |
University of Sydney | |
Centre for Astrophysics | |
University of California Irvine, United States | |
University of California Los Angeles, United States | |
University of Copenhagen, Denmark | |
Gemini Observatory, United States | |
NSF's National Optical Infrared Astronomy Research Laboratory (NOIRLab), United States | |
Yale University, United States | |
University of Notre Dame, United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
Technical University of Denmark, Denmark | |
NASA Ames Research Center, United States | |
NASA Goddard Space Flight Center, United States | |
SETI Institute, United States | |
Massachusetts Institute of Technology, United States | |
Center for Astrobiology (CAB, CSIC-INTA), Spain | |
Catholic University of the Most Holy Conception (UCSC), Chile | |
Planetary Discoveries, United States |
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