SIMBAD references

2024A&A...683A.192J - Astronomy and Astrophysics, volume 683A192 (2024/3-1)

A long-period transiting substellar companion in the super-Jupiters to brown dwarfs mass regime and a prototypical warm-Jupiter detected by TESS.

JONES M.I., REINARZ Y., BRAHM R., TALA PINTO M., EBERHARDT J., ROJAS F., TRIAUD A.H.M.J., GUPTA A.F., ZIEGLER C., HOBSON M.J., JORDAN A., HENNING T., TRIFONOV T., SCHLECKER M., ESPINOZA N., TORRES-MIRANDA P., SARKIS P., ULMER-MOLL S., LENDL M., UZUNDAG M., MOYANO M., HESSE K., CALDWELL D.A., SHPORER A., LUND M.B., JENKINS J.M., SEAGER S., WINN J.N., RICKER G.R., BURKE C.J., FIGUEIRA P., PSARIDI A., AL MOULLA K., MOUNZER D., STANDING M.R., MARTIN D.V., DRANSFIELD G., BAYCROFT T., DRAGOMIR D., BOYLE G., SUC V., MANN A.W., TIMMERMANS M., DUCROT E., HOOTON M.J., ZUNIGA-FERNANDEZ S., SEBASTIAN D., GILLON M., QUELOZ D., CARSON J. and LISSAUER J.J.

Abstract (from CDS):

We report on the confirmation and follow-up characterization of two long-period transiting substellar companions on low-eccentricity orbits around TIC 4672985 and TOI-2529, whose transit events were detected by the TESS space mission. Ground-based photometric and spectroscopic follow-up from different facilities, confirmed the substellar nature of TIC 4672985 b, a massive gas giant in the transition between the super-Jupiters and brown dwarfs mass regime. From the joint analysis we derived the following orbital parameters: P = 69.0480–0.0005+0.0004 d, Mp = 12.74–1.01+1.01Mj, Rp = 1.026–0.067+0.065Rj and e = 0.018–0.004+0.004. In addition, the RV time series revealed a significant trend at the ∼350 m s–1 yr–1 level, which is indicative of the presence of a massive outer companion in the system. TIC 4672985 b is a unique example of a transiting substellar companion with a mass above the deuterium-burning limit, located beyond 0.1 AU and in a nearly circular orbit. These planetary properties are difficult to reproduce from canonical planet formation and evolution models. For TOI-2529 b, we obtained the following orbital parameters: P = 64.5949–0.0003+0.0003 d, Mp = 2.340–0.195+0.197Mj, Rp = 1.030–0.050+0.050Rj and e = 0.021–0.015+0.024, making this object a new example of a growing population of transiting warm giant planets.

Abstract Copyright: © The Authors 2024

Journal keyword(s): techniques: photometric - techniques: radial velocities - planets and satellites: composition - planets and satellites: detection - planets and satellites: formation - planets and satellites: gaseous planets

Simbad objects: 4

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