Revisited mass-radius relations for exoplanets below 120 M⊕

JF Otegi, F Bouchy, R Helled - Astronomy & Astrophysics, 2020 - aanda.org
The masses and radii of exoplanets are fundamental quantities needed for their
characterisation. Studying the different populations of exoplanets is important for …

Framework for the architecture of exoplanetary systems-I. Four classes of planetary system architecture

L Mishra, Y Alibert, S Udry, C Mordasini - Astronomy & Astrophysics, 2023 - aanda.org
We present a novel, model-independent framework for studying the architecture of an
exoplanetary system at the system level. This framework allows us to characterise, quantify …

A pair of sub-Neptunes transiting the bright K-dwarf TOI-1064 characterized with CHEOPS

TG Wilson, E Goffo, Y Alibert, D Gandolfi… - Monthly Notices of …, 2022 - academic.oup.com
We report the discovery and characterization of a pair of sub-Neptunes transiting the bright K-
dwarf TOI-1064 (TIC 79748331), initially detected in the Transiting Exoplanet Survey …

A super-massive Neptune-sized planet

L Naponiello, L Mancini, A Sozzetti, AS Bonomo… - Nature, 2023 - nature.com
Neptune-sized planets exhibit a wide range of compositions and densities, depending on
factors related to their formation and evolution history, such as the distance from their host …

The GAPS Programme at TNG-XLII. A characterisation study of the multi-planet system around the 400 Myr-old star HD 63433 (TOI-1726)

M Damasso, D Locci, S Benatti, A Maggio… - Astronomy & …, 2023 - aanda.org
Context. The GAPS collaboration is carrying out a spectroscopic and photometric follow-up
of a sample of young stars with planets (age≲ 600 Myr) to characterise planetary systems at …

A relationship between stellar age and spot coverage

BM Morris - The Astrophysical Journal, 2020 - iopscience.iop.org
We investigate starspot distributions consistent with space-based photometry of F, G, and K
stars in six stellar associations ranging in age from 10 Myr to 4 Gyr. We show that a simple …

Hydrogen recombination continuum as the radiative model for stellar optical flares

PJA Simões, A Araújo, A Válio… - Monthly Notices of the …, 2024 - academic.oup.com
The study of stellar flares has increased with new observations from CoRoT, Kepler, and
TESS satellites, revealing the broad-band visible emission from these events. Typically …

Tidal inflation reconciles low-density sub-Saturns with core accretion

S Millholland, E Petigura, K Batygin - The Astrophysical Journal, 2020 - iopscience.iop.org
While the solar system contains no planets between the sizes of Uranus and Saturn, our
current exoplanet census includes several dozen such planets with well-measured masses …

Dynamical masses of two young transiting sub-Neptunes orbiting HD 63433

M Mallorquín, VJS Béjar, N Lodieu, MRZ Osorio… - Astronomy & …, 2023 - aanda.org
Context. Although the number of exoplanets reported in the literature exceeds 5000 so far,
only a few dozen of them are young planets (≤ 900 Myr). However, a complete …

Constraining stellar rotation and planetary atmospheric evolution of a dozen systems hosting sub-Neptunes and super-Earths

A Bonfanti, L Fossati, D Kubyshkina… - Astronomy & …, 2021 - aanda.org
Context. Planetary atmospheric evolution modelling is a prime tool for understanding the
observed exoplanet population and constraining formation and migration mechanisms, but it …