Results 121 to 130 of about 1,207,200 (332)

Hot Jupiters Have Giant Companions: Evidence for Coplanar High-eccentricity Migration

The Astrophysical Journal Letters, 2023
This study considers the characteristics of planetary systems with giant planets based on a population-level analysis of the California Legacy Survey planet catalog. We identified three characteristics common to hot Jupiters (HJs).
Jon K. Zink, Andrew W. Howard
doaj   +1 more source

Not a simple relationship between Neptune's migration speed and Kuiper belt inclination excitation [PDF]

, 2019
We present numerical simulations of giant planet migration in our solar system and examine how the speed of planetary migration affects inclinations in the resulting population of small bodies (test particles) scattered outward and subsequently captured into Neptune's 3:2 mean motion resonance (the Plutinos) as well as the hot classical Kuiper belt ...
arxiv   +1 more source

Twin Toughening‐Driven Martensitic Transformation Strategy Synergistic Improvement for Plasticity‐Thermal Shock Resistance of (Hf─Zr─Ti)C Ceramic Coating in Severe Thermal Environments

Advanced Science, EarlyView.
A “ceramic self‐toughening strategy” is introduced for enhancing the plasticity and thermal shock resistance of (Hf─Zr─Ti)C coatings through twin toughening‐driven martensitic transformations in oxide scales. It facilitated the formation of stable, dense, and high‐toughness oxide scales after repeat ablation, and endowed prepared coatings with superior
Jiachen Li, Yulei Zhang, Yanqin Fu, Tao Li, Jian Zhang, Deyu Yang, Lingfei Cao, Fanyu Lu, Junhao Zhao, Junshuai Lv, Hejun Li   +10 more
wiley   +1 more source

On the evolution of the water ocean in the plate-mantle system

Progress in Earth and Planetary Science, 2018
Here, we investigate a possible scenario of surface seawater evolution in the numerical simulations of surface plate motion driven by mantle dynamics, including thermo-chemical convection and water migration, from the early to present-day Earth to ...
Takashi Nakagawa, Hikaru Iwamori, Ryunosuke Yanagi, Atsushi Nakao   +3 more
doaj   +1 more source

High‐Performing Perovskite/Ruddlesden‐Popper Fuel Electrode for High‐Temperature Steam Electrolysis

Advanced Energy Materials, EarlyView.
By combining perovskite and Ruddlesden‐Popper phases, a Ni‐free fuel electrode with exceptional electrocatalytic activity and ionic conductivity is developed. This approach minimizes polarization resistance, achieving 0.053 Ω cm2 at 800 °C and 1.084 W cm−2 power density.
Yousef Alizad Farzin, Mohamad Khoshkalam, Siyuan Guo, Wolfgang Menesklou, Philipp Röse, André Weber   +5 more
wiley   +1 more source

Resonant Chains and the Convergent Migration of Planets in Protoplanetary Disks

The Astronomical Journal
An increasing number of compact planetary systems with multiple planets in a resonant chain have been detected. The resonant chain must be maintained by convergent migration of the planets due to planet–disk interactions if it is formed before the ...
Ka Ho Wong, Man Hoi Lee
doaj   +1 more source

Numerical simulations of type III planetary migration: II. Inward migration of massive planets [PDF]

, 2007
We present a numerical study of rapid, so called type III migration for Jupitersized planets embedded in a protoplanetary disc. We limit ourselves to the case of inward migration, and study in detail its evolution and physics, concentrating on the structure of the corotation and circumplanetary regions, and processes for stopping migration.
arxiv   +1 more source

Boon and Bane of Local Solid State Chemistry on the Performance of LSM‐Based Solid Oxide Electrolysis Cells

Advanced Energy Materials, EarlyView.
Cation diffusion causes an increase in the catalytically active MIEC region in solid oxide cells. Simultaneously, it leads to the additional formation and growth of secondary structures in the electrolyte, which reduces the oxygen diffusion. Abstract High‐temperature solid oxide cells are highly efficient energy converters.
Hanna Türk, Xuan Quy Tran, Patricia König, Adnan Hammud, Vaibhav Vibhu, Franz‐Philipp Schmidt, Dirk Berger, Sören Selve, Vladimir Roddatis, Daniel Abou‐Ras, Frank Girgsdies, Yu‐Te Chan, Thomas Götsch, Hebatallah Ali, Izaak C. Vinke, L.G.J (Bert) de Haart, Michael Lehmann, Axel Knop‐Gericke, Karsten Reuter, Rüdiger‐A. Eichel, Christoph Scheurer, Thomas Lunkenbein   +21 more
wiley   +1 more source

Global Surface Winds and Aeolian Sediment Pathways on Mars From the Morphology of Barchan Dunes

Geophysical Research Letters, 2023
In the absence of consistent meteorological data on Mars, the morphology of dunes can be employed to study its atmosphere. Specifically, barchan dunes, which form under approximately unimodal winds, are reliable proxies for the dominant wind directions ...
L. Rubanenko, A. Gunn, S. Pérez‐López, L. K. Fenton, R. C. Ewing, A. Soto, M. G. A. Lapôtre   +6 more
doaj   +1 more source

A Signature of Planetary Migration: The Origin of Asymmetric Capture in the 2:1 Resonance [PDF]

, 2004
The spatial distribution of Kuiper Belt objects (KBOs) in 2 : 1 exterior resonance with Neptune constrains that planet's migration history. Numerical simulations demonstrate that fast planetary migration generates a larger population of KBOs trailing ...
R. Murray-Clay, E. Chiang
semanticscholar   +1 more source