Searching for GEMS: TOI-5688 A b, a low-density giant orbiting a high-metallicity early M-dwarf
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arXiv
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| Natura: | Preprint |
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2024
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| author | Reji, Varghese Kanodia, Shubham Ninan, Joe Cañas, Caleb I. Libby-Roberts, Jessica Lin, Andrea S. J. Gupta, Arvind F Sewaby, Tera N. Larsen, Alexander Kobulnicky, Henry A. Choi, Philip I. Evans, Nez Santomenna, Sage Winnick, Isabelle Yu, Larry Alvarado-Montes, Jaime A. Bender, Chad Bernabò, Lia Marta Blake, Cullen H. Cochran, William D. Diddams, Scott A. Halverson, Samuel Han, Te Hearty, Fred Logsdon, Sarah E. Mahadevan, Suvrath Monson, Andrew McElwain, Michael Robertson, Paul Ojha, Devendra Roy, Arpita Schwab, Christian Stefansson, Gudmundur Wright, Jason |
| author_facet | Reji, Varghese Kanodia, Shubham Ninan, Joe Cañas, Caleb I. Libby-Roberts, Jessica Lin, Andrea S. J. Gupta, Arvind F Sewaby, Tera N. Larsen, Alexander Kobulnicky, Henry A. Choi, Philip I. Evans, Nez Santomenna, Sage Winnick, Isabelle Yu, Larry Alvarado-Montes, Jaime A. Bender, Chad Bernabò, Lia Marta Blake, Cullen H. Cochran, William D. Diddams, Scott A. Halverson, Samuel Han, Te Hearty, Fred Logsdon, Sarah E. Mahadevan, Suvrath Monson, Andrew McElwain, Michael Robertson, Paul Ojha, Devendra Roy, Arpita Schwab, Christian Stefansson, Gudmundur Wright, Jason |
| contents | We present the discovery of a low-density planet orbiting the high-metallicity early M-dwarf TOI-5688 A b. This planet was characterized as part of the search for transiting giant planets ($R \gtrsim8$ M${}_\oplus$) through the Searching for GEMS (Giant Exoplanets around M-dwarf Stars) survey. The planet was discovered with the Transiting Exoplanet Survey Satellite (TESS), and characterized with ground-based transits from Red Buttes Observatory (RBO), the Table Mountain Observatory of Pomona College, and radial velocity (RV) measurements with the Habitable-Zone Planet Finder (HPF) on the 10 m Hobby Eberly Telescope (HET) and NEID on the WIYN 3.5 m telescope. From the joint fit of transit and RV data, we measure a planetary mass and radius of $124\pm24$ M$_\oplus$ ($0.39\pm0.07$ M${}_J$) and $10.4\pm0.7$ R$_\oplus$ ($0.92\pm0.06$ R${}_J$) respectively. The spectroscopic and photometric analysis of the host star TOI-5688 A shows that it is a metal-rich ([Fe/H] $ = 0.47\pm0.16$ dex) M2V star, favoring the core-accretion formation pathway as the likely formation scenario for this planet. Additionally, Gaia astrometry suggests the presence of a wide-separation binary companion, TOI-5688 B, which has a projected separation of $\sim5"$ (1110 AU) and is an M4V, making TOI-5688 A b part of the growing number of GEMS in wide-separation binary systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_01371 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Searching for GEMS: TOI-5688 A b, a low-density giant orbiting a high-metallicity early M-dwarf Reji, Varghese Kanodia, Shubham Ninan, Joe Cañas, Caleb I. Libby-Roberts, Jessica Lin, Andrea S. J. Gupta, Arvind F Sewaby, Tera N. Larsen, Alexander Kobulnicky, Henry A. Choi, Philip I. Evans, Nez Santomenna, Sage Winnick, Isabelle Yu, Larry Alvarado-Montes, Jaime A. Bender, Chad Bernabò, Lia Marta Blake, Cullen H. Cochran, William D. Diddams, Scott A. Halverson, Samuel Han, Te Hearty, Fred Logsdon, Sarah E. Mahadevan, Suvrath Monson, Andrew McElwain, Michael Robertson, Paul Ojha, Devendra Roy, Arpita Schwab, Christian Stefansson, Gudmundur Wright, Jason Earth and Planetary Astrophysics We present the discovery of a low-density planet orbiting the high-metallicity early M-dwarf TOI-5688 A b. This planet was characterized as part of the search for transiting giant planets ($R \gtrsim8$ M${}_\oplus$) through the Searching for GEMS (Giant Exoplanets around M-dwarf Stars) survey. The planet was discovered with the Transiting Exoplanet Survey Satellite (TESS), and characterized with ground-based transits from Red Buttes Observatory (RBO), the Table Mountain Observatory of Pomona College, and radial velocity (RV) measurements with the Habitable-Zone Planet Finder (HPF) on the 10 m Hobby Eberly Telescope (HET) and NEID on the WIYN 3.5 m telescope. From the joint fit of transit and RV data, we measure a planetary mass and radius of $124\pm24$ M$_\oplus$ ($0.39\pm0.07$ M${}_J$) and $10.4\pm0.7$ R$_\oplus$ ($0.92\pm0.06$ R${}_J$) respectively. The spectroscopic and photometric analysis of the host star TOI-5688 A shows that it is a metal-rich ([Fe/H] $ = 0.47\pm0.16$ dex) M2V star, favoring the core-accretion formation pathway as the likely formation scenario for this planet. Additionally, Gaia astrometry suggests the presence of a wide-separation binary companion, TOI-5688 B, which has a projected separation of $\sim5"$ (1110 AU) and is an M4V, making TOI-5688 A b part of the growing number of GEMS in wide-separation binary systems. |
| title | Searching for GEMS: TOI-5688 A b, a low-density giant orbiting a high-metallicity early M-dwarf |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2409.01371 |