Results 81 to 90 of about 171,913 (339)
Water Enrichment from Pebble Drift in Disks with Gap-forming Planets
The Astrophysical JournalVolatiles like H _2 O are present as ice in solids in the cold outer regions of protoplanetary disks and as vapor in the warm inner regions within the water snow line.
Whittney Easterwood +2 more
doaj +1 more source
The Detection and Characterization of Extrasolar Planets
Challenges, 2014 We have now confirmed the existence of > 1800 planets orbiting stars other thanthe Sun; known as extrasolar planets or exoplanets. The different methods for detectingsuch planets are sensitive to different regions of parameter space, and so, we are ...
Ken Rice
doaj +1 more source
Properties of planets in binary systems. The role of binary separation [PDF]
, 2006 The statistical properties of planets in binaries were investigated. Any difference to planets orbiting single stars can shed light on the formation and evolution of planetary systems. As planets were found around components of binaries with very different separation and mass ratio, it is particularly important to study the characteristics of planets ...
arxiv +1 more source
Advanced Functional Materials, EarlyView.HKUST‐1/TiO2 composite materials show a very high photocatalytic hydrogen evolution rate which increases as a function of the irradiation time until reaching a plateau and even surpasses the performance of the 1%Pt/TiO2 material after three photocatalytic cycles.
Alisha Khan +9 more
wiley +1 more source
Broadening the Canonical Picture of EUV-driven Photoevaporation of Accretion Disks
The Astrophysical JournalPhotoevaporation driven by hydrogen-ionizing extreme-ultraviolet (EUV) radiation profoundly shapes the lives of diverse astrophysical objects. We construct an analytical model accounting for the finite timescales of photoheating and photoionization and ...
Riouhei Nakatani +2 more
doaj +1 more source
The frequency of planets in multiple systems [PDF]
, 2007 The frequency of planets in binaries is an important issue in the field of extrasolar planet studies, because of its relevance in estimating of the global planet population of our Galaxy and the clues it can give to our understanding of planet formation and evolution. However, only preliminary estimates are available in the literature.
arxiv +1 more source
Formation of Giant Planets [PDF]
AIP Conference Proceedings, 2004 This is a descriptive and non‐mathematical summary of giant planet formation theories. There are two end‐member models, core accretion and disk instability. In the core accretion model, several to ten Earth masses of solid (ice and rock) accumulate and this promotes subsequent gas accretion.
openaire +4 more sources
Optical Control of Ferroelectric Imprint in BiFeO3
Advanced Functional Materials, EarlyView.Above‐bandgap irradiation at room temperature enables on‐demand optical control of defect‐driven built‐in electric fields in BiFeO₃ thin films, fabricated via scalable, chemical spray pyrolysis. These fields, otherwise “frozen‐in,” can cause severe device degradation, including non‐switchable polarization, dead layers near interfaces, and polarization ...
Haoze Zhang +8 more
wiley +1 more source
Constraining the formation of WASP-39b using JWST transit spectroscopy [PDF]
A&A, volume 685, Article A64, Year 2024Understanding the formation history of planets is one of the goals of studying exoplanet atmospheres. The atmospheric composition of planets can provide insights into the formation pathways of planets. Even though the mapping of the atmospheric composition onto a formation pathway is not unambiguous, with the increasing sensitivity of modern ...
arxiv +1 more source
Low-Eccentricity Migration of Ultra-Short Period Planets in Multi-Planet Systems [PDF]
, 2019 Recent studies suggest that ultra-short period planets (USPs), Earth-sized planets with sub-day periods, constitute a statistically distinct sub-sample of {\it Kepler} planets: USPs have smaller radii ($1-1.4R_\oplus$) and larger mutual inclinations with neighboring planets than nominal {\it Kepler} planets, and their period distribution is steeper ...
arxiv +1 more source