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

@misc{heidari2026sophie,
  title = {{SOPHIE and TESS characterization of fourteen TESS Objects of Interest: nine planetary systems and five low-mass stellar companions}},
  author = {N. Heidari and G. Hébrard and S. Sousa and T. Forveille and F. Destriez and J. D. Eastman and J. M. Almenara and D. W. Latham and B. S. Safonov and R. Brahm and K. G. Stassun and K. A. Collins and D. Dragomir and J. Janík and I. Boisse and J. G. Barrientos and J. Serrano Bell and F. Kiefer and A. Bieryla and Xavier Bonfils and Z. Balkóová and G. Conzo and M. Deleuil and O. D. S. Demangeon and X. Delfosse and R. F. Díaz and Z. Essack and J. Eberhardt and Y. N. E. Eschen and A. C. Frommer and F. R. Frustagia and D. Feliz and A. F. Gupta and N. Hara and T. Henning and S. B. Howell and A. Jordán and J. Köhler and J. F. Kielkopf and H. A. Knutson and J. Lipták and C. R. Mann and E. Martioli and C. Moutou and F. Murgas and B. Nicholson and P. Pintr and M. Tala Pinto and S. N. Quinn and H. M. Relles and P. Rowden and R. P. Schwarz and R. Sefako and A. Shporer and G. Srdoc and C. Stockdale and I. A. Strakhov and B. Skinner and B. M. Tofflemire and T. Trifonov},
  howpublished = {HAL},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.08584},
  eprint = {2610.08584},
  archivePrefix = {arXiv},
  url = {https://hal.science/hal-05843569v1},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - SOPHIE and TESS characterization of fourteen TESS Objects of Interest: nine planetary systems and five low-mass stellar companions
AU  - N. Heidari
AU  - G. Hébrard
AU  - S. Sousa
AU  - T. Forveille
AU  - F. Destriez
AU  - J. D. Eastman
AU  - J. M. Almenara
AU  - D. W. Latham
AU  - B. S. Safonov
AU  - R. Brahm
AU  - K. G. Stassun
AU  - K. A. Collins
AU  - D. Dragomir
AU  - J. Janík
AU  - I. Boisse
AU  - J. G. Barrientos
AU  - J. Serrano Bell
AU  - F. Kiefer
AU  - A. Bieryla
AU  - Xavier Bonfils
AU  - Z. Balkóová
AU  - G. Conzo
AU  - M. Deleuil
AU  - O. D. S. Demangeon
AU  - X. Delfosse
AU  - R. F. Díaz
AU  - Z. Essack
AU  - J. Eberhardt
AU  - Y. N. E. Eschen
AU  - A. C. Frommer
AU  - F. R. Frustagia
AU  - D. Feliz
AU  - A. F. Gupta
AU  - N. Hara
AU  - T. Henning
AU  - S. B. Howell
AU  - A. Jordán
AU  - J. Köhler
AU  - J. F. Kielkopf
AU  - H. A. Knutson
AU  - J. Lipták
AU  - C. R. Mann
AU  - E. Martioli
AU  - C. Moutou
AU  - F. Murgas
AU  - B. Nicholson
AU  - P. Pintr
AU  - M. Tala Pinto
AU  - S. N. Quinn
AU  - H. M. Relles
AU  - P. Rowden
AU  - R. P. Schwarz
AU  - R. Sefako
AU  - A. Shporer
AU  - G. Srdoc
AU  - C. Stockdale
AU  - I. A. Strakhov
AU  - B. Skinner
AU  - B. M. Tofflemire
AU  - T. Trifonov
PY  - 2026
DA  - 2026/10/06
PB  - HAL
DO  - 10.48550/arxiv.2610.08584
UR  - https://hal.science/hal-05843569v1
AB  - We present a study of fourteen TESS Objects of Interest (TOIs) observed as part of the SOPHIE-TESS follow-up program. Using TESS photometry, SOPHIE radial velocities (RVs), ground-based photometry, and high-spatial resolution imaging, we characterized all targets and established their true nature. Among them, nine systems-TOI-6457, TOI-6883A, TOI-6649, TOI-6842A, TOI-5217A, TOI-6893A, TOI-7025, TOI-7176, and TOI-5893-are shown to host planets. We find that TOI-6649 b, TOI-6842A b, and TOI-5217A b are transiting hot Jupiters with orbital periods of approximately 4.4-6.0 d, radii of 1.3-1.6 R J , and masses of 0.3-1.3 M J , corresponding to bulk densities of 0.1-0.6 g cm -3 . Our RV data further reveal that TOI-5217A hosts an outer companion, TOI-5217A c, with a period of ∼1761 d, a minimum mass of ∼ 13 M J , and a significantly eccentric orbit (e = 0.53 ± 0.02). We also characterize TOI-5893 b, TOI-6893A b, TOI-6457 b, TOI-7176 b, and TOI-7025 b as transiting warm Jupiters, a relatively scarce population. Their orbital periods range from 40.4 to 67.0 days, with radii of 0.8-1.2 R J and masses of 0.5-1.0 M J . In addition, TOI-6883A b-a recently reported transiting warm Jupiter-is further characterized using new ground-and space-based photometry together with SOPHIE and TRES RVs. The remaining five systems-TOI-5621AB, TOI-5321AB, TOI-3678AB, TOI-5906AB and TOI-5308AB-exhibit large RV semi-amplitudes indicative of eclipsing binaries. The companions have estimated masses of 0.1-0.6 M ⊙ and radii of 0.1-0.6 R ⊙ . Among our sample, TOI-6842A b stands out as an extremely low-density giant planet (ρ p = 0.08 ± 0.01 g cm -3 ), placing it in the super-puff category and ranking it among the nine lowest-density planets known to date. With a transmission spectroscopy metric of ∼250, it represents an excellent target for atmospheric characterization. Additionally, transiting planets TOI-6883A b, TOI-6893A b, TOI-6457 b, TOI-5893 b, TOI-7176 b, and TOI-7025 b-each with equilibrium temperatures between 377 and 846 K-provide valuable low-irradiation benchmarks for control models of hot-Jupiter inflation. Furthermore, TOI-7025 b stands out due to its orbital eccentricity of 0.82±0.02, one of the largest planetary eccentricities discovered so far for a planet orbiting a single star. Finally, using the Gaia astrometric excess noise, we detect TOI-5906 B, marking the first discovery of an object identified using all three techniques: transit, RV, and astrometry.
ER  -