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arXiv · 2610.08584

SOPHIE and TESS characterization of fourteen TESS Objects of Interest: nine planetary systems and five low-mass stellar companions

N. Heidari·G. Hébrard·S. Sousa·T. Forveille·F. Destriez·J. D. Eastman·J. M. Almenara·D. W. Latham·B. S. Safonov·R. Brahm·K. G. Stassun·K. A. Collins·D. Dragomir·J. Janík·I. Boisse·J. G. Barrientos·J. Serrano Bell·F. Kiefer·A. Bieryla·X. Bonfils·Z. Balkóová·G. Conzo·M. Deleuil·O. D. S. Demangeon·X. Delfosse·R. F. Díaz·Z. Essack·J. Eberhardt·Y. N. E. Eschen·A. C. Frommer·F. R. Frustagia·D. Feliz·A. F. Gupta·N. Hara·T. Henning·S. B. Howell·A. Jordán·J. Köhler·J. F. Kielkopf·H. A. Knutson·J. Lipták·C. R. Mann·E. Martioli·C. Moutou·F. Murgas·B. Nicholson·P. Pintr·M. Tala Pinto·S. N. Quinn·H. M. Relles·P. Rowden·R. P. Schwarz·R. Sefako·A. Shporer·G. Srdoc·C. Stockdale·I. A. Strakhov·B. Skinner·B. M. Tofflemire·T. Trifonov·S. Ulmer-Moll·L. Vanzi·F. P. Wilkin·C. Ziegler
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Abstract

We present fourteen TESS Objects of Interest (TOIs) from the SOPHIE-TESS follow-up program. Combining TESS photometry, SOPHIE radial velocities (RVs), ground-based photometry, and high-resolution imaging, we establish the nature of all targets. Nine systems (TOI-6457, TOI-6883A, TOI-6649, TOI-6842A, TOI-5217A, TOI-6893A, TOI-7025, TOI-7176, and TOI-5893) host planets. TOI-6649 b, TOI-6842A b, and TOI-5217A b are transiting hot Jupiters with periods of 4.4-6.0 d, radii of 1.3-1.6 RJ, masses of 0.3-1.3 MJ, and densities of 0.1-0.6 g/cm3. TOI-5217A also hosts an outer companion, TOI-5217A c, with a period of about 1761 d, a minimum mass of about 13 MJ, and an eccentric orbit (e = 0.53 +/- 0.02). TOI-5893 b, TOI-6893A b, TOI-6457 b, TOI-7176 b, and TOI-7025 b are transiting warm Jupiters with periods of 40.4-67.0 d, radii of 0.8-1.2 RJ, and masses of 0.5-1.0 MJ. TOI-6883A b, a recently reported warm Jupiter, is further characterized with new photometry and SOPHIE and TRES RVs. The other five systems (TOI-5621AB, TOI-5321AB, TOI-3678AB, TOI-5906AB, TOI-5308AB) show large RV amplitudes indicating eclipsing binaries (companions of 0.1-0.6 Msun and 0.1-0.6 Rsun). TOI-6842A b is a super-puff (density 0.08 +/- 0.01 g/cm3), among the nine lowest-density planets known, and with a transmission spectroscopy metric of about 250 it is an excellent target for atmospheric characterization. The six warm Jupiters, with equilibrium temperatures of 377-846 K, are low-irradiation benchmarks for hot-Jupiter inflation models. TOI-7025 b has an eccentricity of 0.82 +/- 0.02, one of the largest known for a planet orbiting a single star. Finally, using Gaia astrometric excess noise, we detect TOI-5906 B, the first object identified by transit, RV, and astrometry.

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N. Heidari, G. Hébrard, S. Sousa, T. Forveille, F. Destriez, J. D. Eastman, J. M. Almenara, D. W. Latham, B. S. Safonov, R. Brahm, K. G. Stassun, K. A. Collins, D. Dragomir, J. Janík, I. Boisse, J. G. Barrientos, J. Serrano Bell, F. Kiefer, A. Bieryla, X. Bonfils, Z. Balkóová, G. Conzo, M. Deleuil, O. D. S. Demangeon, X. Delfosse, R. F. Díaz, Z. Essack, J. Eberhardt, Y. N. E. Eschen, A. C. Frommer, F. R. Frustagia, D. Feliz, A. F. Gupta, N. Hara, T. Henning, S. B. Howell, A. Jordán, J. Köhler, J. F. Kielkopf, H. A. Knutson, J. Lipták, C. R. Mann, E. Martioli, C. Moutou, F. Murgas, B. Nicholson, P. Pintr, M. Tala Pinto, S. N. Quinn, H. M. Relles, P. Rowden, R. P. Schwarz, R. Sefako, A. Shporer, G. Srdoc, C. Stockdale, I. A. Strakhov, B. Skinner, B. M. Tofflemire, T. Trifonov, S. Ulmer-Moll, L. Vanzi, F. P. Wilkin, C. Ziegler. 2026-10-06. SOPHIE and TESS characterization of fourteen TESS Objects of Interest: nine planetary systems and five low-mass stellar companions. https://arxiv.org/abs/2610.08584

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