C. Hellier

A four-planet system orbiting the old thick disk star TOI-1203

D. Gandolfi, A. Alnajjarine, L. M. Serrano, J. A. Egger et autres

TOI-1203 is a bright (V=8.6) G3 V star known to host a transiting warm sub-Neptune on a 25.5 d orbit. Here we report on an intensive high-precision radial velocity and photometric follow-up campaign carried out with the HARPS spectrograph and the CHEOPS …

NGTS-30b/TOI-4862b: An ~1 Gyr old 98-day transiting warm Jupiter

Matthew P. Battley, K. A. Collins, Soléne Ulmer-Moll, Samuel N. Quinn et autres

Context. Long-period transiting exoplanets bridge the gap between the bulk of transit- and Doppler-based exoplanet discoveries, providing key insights into the formation and evolution of planetary systems. The wider separation between these planets and their host stars results in the exoplanets typically …

Two Young Planetary Systems around Field Stars with Ages between 20 and 320 Myr from TESS

Colm Stockdale, A. Bieryla, C.E. Brasseur, P. Berlind et autres

Planets around young stars trace the early evolution of planetary systems. We report the discovery and validation of two planetary systems with ages <∼300Myr from observations by the Transiting Exoplanet Survey Satellite (TESS). The 40 V320 Myr old G star TOI-251 hosts …

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TIC 278956474: Two Close Binaries in One Young Quadruple System Identified by TESS

K.G. Stassun, J. Schlieder, E.B. Ting, N. Law et autres

We have identified a quadruple system with two close eclipsing binaries in Transiting Exoplanet Survey Satellite (TESS) data. The object is unresolved in Gaia and appears as a single source at parallax 1.08 ± 0.01 mas. Both binaries have observable primary and …

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