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Diddams, Shane O'Brien, Shubham Kanodia, Te Han, Tera Swaby, William D. Cochran","submitted_at":"2025-10-13T18:01:02Z","abstract_excerpt":"We confirm the planetary nature of (1) TOI-5916 b and (2) TOI-6158 b, two Exoplanets Transiting M-dwarf Stars (GEMS), both discovered by the Transiting Exoplanet Survey Satellite (TESS). Both systems were confirmed with ground-based photometry (Red Buttes Observatory and Swope, respectively) and radial velocity data from the Habitable-zone Planet Finder. Their radii are $R_{1}=11.8^{+0.52}_{-0.51}\\text{ }R_{\\oplus}$ and $R_{2}=10.4^{+2.70}_{-1.11}\\text{ }R_{\\oplus}$ and masses are $M_{1}=219\\pm28\\text{ }M_{\\oplus}$ and $M_{2}=135^{+19}_{-18}\\text{ }M_{\\oplus}$. 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Lin, Andrew Monson, Arpita Roy, Arvind F. Gupta, Caleb I. Ca\\~nas, Chad F. Bender, Christian Schwab, Daniel M. Krolikowski, Gudmundur Stefansson, Henry A. Kobulnicky, Jessica E. Libby-Roberts, Joe P. Ninan, Michael Rodruck, Nidia Morrell, Paul Robertson, Samuel Halverson, Scott A. Diddams, Shane O'Brien, Shubham Kanodia, Te Han, Tera Swaby, William D. Cochran","submitted_at":"2025-10-13T18:01:02Z","abstract_excerpt":"We confirm the planetary nature of (1) TOI-5916 b and (2) TOI-6158 b, two Exoplanets Transiting M-dwarf Stars (GEMS), both discovered by the Transiting Exoplanet Survey Satellite (TESS). Both systems were confirmed with ground-based photometry (Red Buttes Observatory and Swope, respectively) and radial velocity data from the Habitable-zone Planet Finder. Their radii are $R_{1}=11.8^{+0.52}_{-0.51}\\text{ }R_{\\oplus}$ and $R_{2}=10.4^{+2.70}_{-1.11}\\text{ }R_{\\oplus}$ and masses are $M_{1}=219\\pm28\\text{ }M_{\\oplus}$ and $M_{2}=135^{+19}_{-18}\\text{ }M_{\\oplus}$. 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