Results 71 to 80 of about 1,040 (180)
Interior Evolution of Magma Oceans Exoplanets
The magma ocean (MO) phase typically describes the early stage of rocky planets, during which the entire planet is molten due to heat generated by accretion processes. In the case of short-period exoplanets inside the runaway greenhouse limit, this phase may last Gyrs, until the inventory of major greenhouse gasses, such as H2O and H2, is exhausted ...
Mariana Sastre +4 more
openaire +2 more sources
Helium in the Extended Atmosphere of the Warm Superpuff TOI-1420b
The Astronomical JournalSuperpuffs are planets with exceptionally low densities ( ρ ≲ 0.1 g cm ^−3 ) and core masses ( M _c ≲ 5 M _⊕ ). Many lower-mass ( M _p ≲ 10 M _⊕ ) superpuffs are expected to be unstable to catastrophic mass loss via photoevaporation and/or boil-off ...
Shreyas Vissapragada +13 more
doaj +1 more source
Do Super-puffs Defy Core Accretion? Population-wide Interior Structure Constraints
The Astrophysical JournalSub-Saturn mass planets with extremely low bulk densities ( ρ ≲ 0.3 g cm ^−3 ), or “super-puffs,” are one of the most interesting and least understood populations of exoplanets.
Nicholas T. Marston +2 more
doaj +1 more source
Formation and evolution of exoplanets in different environments
, 2017 Invited Review. To appear in Astronomical Society of the Pacific (ASP) Conference Series "Non-Stable Universe: Energetic Resources, Activity Phenomena and Evolutionary Processes" dedicated to the 70th anniversary of Byurakan Astrophysical ...
openaire +2 more sources
The evolution of stellar surface activity and possible effects on exoplanets [PDF]
Proceedings of the International Astronomical Union, 2010 AbstractThe evolution of stellar activity involves a complex interplay between the interior dynamo mechanism, the emergent magnetic field configurations and their coupling with stellar winds, the subsequent angular momentum evolution, and fundamental stellar parameters.
openaire +1 more source
Sub-Neptune Memories. I. Implications of Inefficient Mantle Cooling and Silicate Rain
The Astrophysical JournalWe explore the evolution of sub-Neptune (radii between ∼1.5 and 4 R _⊕ ) exoplanet interior structures using our upgraded evolution code, APPLE , which self-consistently couples the thermal and compositional evolution of the whole structure.
Roberto Tejada Arevalo +5 more
doaj +1 more source
APPLE: An Evolution Code for Modeling Giant Planets
The Astrophysical JournalWe introduce APPLE , a novel planetary evolution code designed specifically for the study of giant exoplanet and Jovian planet evolution in the era of Galileo, Juno, and Cassini. With APPLE , state-of-the-art equations of state for hydrogen, helium, ice,
Ankan Sur +4 more
doaj +1 more source
Evolution of Exoplanet Detection Techniques
The discovery of exoplanets has transformed modern astrophysics, offering crucial insights helping us to understand planetary systems beyond our own. This paper reviews the various methods of exoplanet detection, outlining how these methods have improved and raised our understanding about the characteristics of these exoplanets.
openaire +2 more sources
Mapping out the time-evolution of exoplanet processes
, 2019 There are many competing theories and models describing the formation, migration and evolution of exoplanet systems. As both the precision with which we can characterize exoplanets and their host stars, and the number of systems for which we can make such a characterization increase, we begin to see pathways forward for validating these theories.
Christiansen, Jessie L. +4 more
openaire +2 more sources
The Astronomical JournalExoplanet systems are thought to evolve on secular timescales over billions of years. This evolution is impossible to directly observe on human timescales in most individual systems.
Stephen P. Schmidt +2 more
doaj +1 more source