SIMBAD references

2026ApJ...996L..13E - Astrophys. J., 996, L13 (2026/January-1)

A Cold and Superpuffy Planet on a Prograde Orbit.

ESPINOZA-RETAMAL J.I., BRAHM R., PETROVICH C., JORDAN A., HENNING T., TRIFONOV T., WINN J.N., REA E., GUNTHER M.N., AGABI A., BENDJOYA P., BHASKAR H., BOUCHY F., CATELAN M., CHARALAMBOUS C., DELOUPY V., DRANSFIELD G., EBERHARDT J., ESPINOZA N., FRECKELTON A.V., GUILLOT T., HOBSON M.J., JONES M.I., LENDL M., MEKARNIA D., MUNOZ D.J., NIELSEN D.L., ROJAS F.I., SCHMIDER F.-X., SEDAGHATI E., STEFANSSON G., STRIEGEL S., SUAREZ O., TALA PINTO M., TIMMERMANS M., TRIAUD A.H.M.J., UDRY S., ULMER-MOLL S. and ZIEGLER C.

Abstract (from CDS):

We report the discovery of TOI-4507 b, a transiting sub-Saturn with a density <0.2 g cm–3 on a 105 days prograde orbit around a 700 Myr old F star. The transits were detected using data from TESS as well as the Antarctic telescope ASTEP. A joint analysis of the light curves and radial velocities from HARPS, FEROS, and CORALIE confirmed the planetary nature of the signal, by limiting the mass to be below 20 M⊕ at 95% confidence. The radial velocities also exhibit the Rossiter-McLaughlin effect and imply that the planet orbits the star in a prograde orbit with a sky-projected obliquity $\lambda =-{15}_{-44}^{+50}$° (∣λ∣ < 80° at 3σ). With these characteristics, TOI-4507 is one of the longest-period systems for which the stellar obliquity has been measured, and the planet is among the longest-period and youngest “superpuff” planets yet discovered.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Transit photometry - Exoplanets - Radial velocity - Cold Neptunes

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 16

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