High-contrast, high-angular resolution view of the GJ 367 exoplanet system [PDF]
Monthly notices of the Royal Astronomical Society, 2022 We search for additional companions in the GJ 367 exoplanet system, and aim at better constraining its age and evolutionary status. We analyse high contrast direct imaging observations obtained with HST/NICMOS, VLT/NACO, and VLT/SPHERE.
W. Brandner +3 more
semanticscholar +1 more source
Exoplanet atmospheres at high resolution through a modest-size telescope. Fe II in MASCARA-2b and KELT-9b with FIES on the Nordic Optical Telescope [PDF]
Astronomy & Astrophysics, 2022 Ground-based, high-resolution spectrographs are providing us with an unprecedented view of the dynamics and chemistry of the atmospheres of planets outside the Solar System.
A. Bello-Arufe +6 more
semanticscholar +1 more source
Evolution of Planetary Obliquity: The Eccentric Kozai–Lidov Mechanism Coupled with Tide
The Astrophysical Journal, 2023 Planetary obliquity plays a significant role in determining the physical properties of planetary surfaces and climate. As direct detection is constrained due to the present observation accuracy, kinetic theories are helpful for predicting the evolution ...
Xiumin Huang +4 more
doaj +1 more source
The Astronomical Journal, 2023 We present a validation of a long-period ( ${91.68278}_{-0.00041}^{+0.00032}$ days) transiting sub-Neptune planet, TOI-1221 b (TIC 349095149.01), around a Sun-like ( m _V = 10.5) star.
Christopher Mann +27 more
doaj +1 more source
Kepler-80 Revisited: Assessing the Participation of a Newly Discovered Planet in the Resonant Chain
The Astronomical Journal, 2023 In this paper, we consider the chain of resonances in the Kepler-80 system and evaluate the impact that the additional member of the resonant chain discovered by Shallue & Vanderburg has on the dynamics of the system and the physical parameters that can ...
D. Weisserman +2 more
doaj +1 more source
Exploring Climate with Obliquity in a Variable-eccentricity Earth-like World
The Astronomical Journal, 2023 Exploring planetary systems similar to our solar system can provide a means to explore a large range of possibly temperate climates on Earth-like worlds.
M. J. Way +2 more
doaj +1 more source
Longitudinally Asymmetric Stratospheric Oscillation on a Tidally Locked Exoplanet [PDF]
Astrophysical Journal, 2021 Using a three-dimensional general circulation model, we show that the atmospheric dynamics on a tidally locked Earth-like exoplanet, simulated with the planetary and orbital parameters of Proxima Centauri b, support a longitudinally asymmetric ...
Maure J. Cohen +6 more
semanticscholar +1 more source
exoMMR: A New Python Package to Confirm and Characterize Mean Motion Resonances
The Astronomical Journal, 2023 The study of orbital resonances allows for the constraint of planetary properties of compact systems. We can predict a system’s resonances by observing the orbital periods of the planets, as planets in or near mean motion resonance (MMR) have period ...
Mariah G. MacDonald +4 more
doaj +1 more source
A survey of exoplanet phase curves with Ariel [PDF]
Experimental astronomy (Print), 2021 The ESA-Ariel mission will include a tier dedicated to exoplanet phase curves corresponding to ∼10%\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs}
B. Charnay +14 more
semanticscholar +1 more source
Tidal Dissipation Regimes among the Short-period Exoplanets
The Astrophysical Journal Letters, 2023 The efficiency of tidal dissipation provides a zeroth-order link to a planet’s physical properties. For super-Earth and sub-Neptune planets in the range R _⊕ ≲ R _p ≲ 4 R _⊕ , particularly efficient dissipation (i.e., low tidal quality factors) may ...
Emma M. Louden +2 more
doaj +1 more source