The current census of planetary systems displays a wide range of architectures. Extending earlier work, this paper investigates the correlation between our classification framework for these architectures and host stellar […]
Stellar Cartography
Posted inAI - Data - Apps - Cybernetics, Astronomy & Telescopes, Exoplanets, -moons, -comets, Status Report, Stellar Cartography
ExoDNN: Boosting Exoplanet Detection With Artificial Intelligence. Application to Gaia Data Release 3
We combine Gaia Data Release 3 and artificial intelligence to enhance the current statistics of substellar companions, particularly within regions of the orbital period vs. mass parameter space that remain […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report, Stellar Cartography
The SPIRou Legacy Survey: Detection Of A Nearby World Orbiting In The Habitable Zone Of Gl725B
M dwarfs are prime targets in the search for exoplanets because of their prevalence and because low-mass planets can be better detected with radial velocity (RV) methods. In particular, the […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Press Release, Science Fiction, Stellar Cartography
Why Are Tatooine Planets Rare? Blame General Relativity
Of the more than 4,500 stars known to have planets, one puzzling statistic stands out. Even though nearly all stars are expected to have planets and most stars form in […]
Posted inExoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release, Stellar Cartography
A New Signal Around HD 206893 B: An Exomoon Candidate Revealed By Ultra-high-precision Astrometry
A study led by a researcher from the Paris Observatory-PSL within the Laboratory for Instrumentation and Research in Astrophysics (LIRA – CNRS / Sorbonne University / Université Paris Cité) reveals […]
Posted inExoplanets, -moons, -comets, Status Report, Stellar Cartography
Architectures of Exoplanetary Systems. IV: A Multi-planet Model for Reproducing the Radius Valley and Intra-system Size Similarity of Planets around Kepler’s FGK Dwarfs
The Kepler-observed distribution of planet sizes have revealed two distinct patterns: (1) a radius valley separating super-Earths and sub-Neptunes and (2) a preference for intra-system size similarity.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Stellar Cartography
Orbital Stability Of Compact Three-planet Systems III. The Role Of Three-body Resonances
Observational surveys show that at least ~ 30% of short-period multiplanetary systems host tightly packed planets, some of which are locked in stable chains of mean-motion resonances.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Stellar Cartography, Water/Hycean Worlds & Oceanography
Discovery and Characterisation of Two Exoplanets Orbiting the Metal-poor, Solar-type Star TOI-5788 with TESS, CHEOPS, and HARPS-N
We present the discovery and characterisation of two transiting exoplanets orbiting the metal-poor, solar-type star TOI-5788.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Status Report, Stellar Cartography
Orbital Stability Of Closely-Spaced Four-planet Systems
We investigate the orbital dynamics of four-planet systems consisting of Earth-mass planets on initially-circular, coplanar orbits around a star of one solar mass.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report, Stellar Cartography
Modeling the Impact of Unresolved Stellar Companions on Detection Sensitivity in Kepler’s Small Planet Occurrence Rates
Unresolved stellar companions can cause both under-estimations in the radii of transiting planets and over-estimations of their detectability, affecting our ability to reliably measure planet occurrence rates.