Results 51 to 60 of about 6,735 (287)

The accretion of migrating giant planets [PDF]

Astronomy & Astrophysics, 2017
Most studies concerning the growth and evolution of massive planets focus either on their accretion or their migration only. In this work we study both processes concurrently to investigate how they might mutually affect each other. We modeled a 2-dimensional disk with a steady accretion flow onto the central star and embed a Jupiter mass planet at 5.2
Kley, Wilhelm, Dürmann, Christoph
openaire   +4 more sources

Configuration and Charge Dynamics of Defect‐Cluster‐Dipoles in CaTiO3 for Enhanced Permittivity

Advanced Electronic Materials, EarlyView.
In La‐doped CaTiO3, the clustering of La ion and Ca vacancies is clearly observed and the configuration of such defect‐cluster is validated. Combining photoelctronic and dielectric spectroscopy enables the dielectric relaxation process with the charge transfer routes.
Jian Wang, Zhuowen Zou, Jiajun Zhu, Dandan Gao, Wanbiao Hu   +4 more
wiley   +1 more source

JWST Directly Images Giant Planet Candidates Around Two Metal-polluted White Dwarf Stars

The Astrophysical Journal Letters
We report the discovery of two directly imaged, giant planet candidates orbiting the metal-rich, hydrogen atmosphere white dwarfs WD 1202−232 and WD 2105−82. JWST’s Mid-Infrared Instrument (MIRI) data on these two stars show a nearby resolved source at a
Susan E. Mullally, John Debes, Misty Cracraft, Fergal Mullally, Sabrina Poulsen, Loic Albert, Katherine Thibault, William T. Reach, J. J. Hermes, Thomas Barclay, Mukremin Kilic, Elisa V. Quintana   +11 more
doaj   +1 more source

Alternative Solid‐State Synthesis Route for Highly Fluorinated Disordered Rock‐Salt Cathode Materials for High‐Energy Lithium‐Ion Batteries

Advanced Energy Materials, EarlyView.
This work presents a tailored solid‐state route to enhance DRX fluorination and electrochemical performance. Using unconventional precursors, Li6MnO4, MnF2, and TiO2, prevents Mn‐based intermediates, which do not accommodate fluorines, enabling the formation of highly fluorinated DRX with a composition of Li1.23Mn0.40Ti0.37O2−yFy (y = 0.29–0.34 ...
Venkata Sai Avvaru, Tianyu Li, Gi‐Hyeok Lee, Young‐Woon Byeon, Krishna Prasad Koirala, Otavio Jovino Marques, Bernardine L. D. Rinkel, Yanbao Fu, David Milsted, Seonghun Jeong, Nathan J. Szymanski, Martin Kunz, Finn Babbe, Eunryeol Lee, Vincent Battaglia, Bryan D. McCloskey, Johanna Nelson Weker, Chongmin Wang, Wanli Yang, Raphaële J. Clément, Haegyeom Kim   +20 more
wiley   +1 more source

Breaking Giant Chains: Early-stage Instabilities in Long-period Giant Planet Systems

The Astrophysical Journal
Orbital evolution is a critical process that sculpts planetary systems, particularly during their early stages where planet–disk interactions are expected to lead to the formation of resonant chains.
Vighnesh Nagpal, Max Goldberg, Konstantin Batygin   +2 more
doaj   +1 more source

Long-term Stability of Planetary Systems Formed from a Transitional Disk

The Astrophysical Journal, 2023
Transitional disks are protoplanetary disks with large and deep central holes in the gas, possibly carved by young planets. Dong & Dawson simulated systems with multiple giant planets that were capable of carving and maintaining such gaps during the disk
Rory Bowens, Andrew Shannon, Rebekah Dawson, Jiayin Dong   +3 more
doaj   +1 more source

Ru Single Atoms Anchored on Co3O4 Nanorods for Efficient Overall Water Splitting under pH‐Universal Conditions

Advanced Energy Materials, EarlyView.
A Ru8%‐Co3O4 catalyst containing Ru single atoms (SAs) exhibits exceptional oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performance in acidic, neutral, and alkaline media. When used as the anode and cathode catalysts in an anion exchange membrane water electrolyzer (AEMWE) device, a low cell voltage of just 2.06 V is needed to
Yongfang Zhou, Yu Mao, Cuizhu Ye, Ziyun Wang, Shanghai Wei, John V. Kennedy, Yufei Zhao, Hui Yang, Bruce C. C. Cowie, Geoffrey I. N. Waterhouse   +9 more
wiley   +1 more source

High‐resolution drone imagery reveals drivers of fine‐scale giant otter habitat selection in the land‐water interface

Conservation Science and Practice, Volume 4, Issue 12, December 2022., 2022
Abstract Neotropical freshwater habitats are particularly sensitive to degradation by human activity. Piscivorous semi‐aquatic freshwater megafauna inhabit both the terrestrial and aquatic mediums and thus may be good indicators of wetland habitat quality.
Nicole Abanto Valladares, Alejandro Alarcon Pardo, Luca Chiaverini, Jessica Groenendijk, Lauren A. Harrington, David W. Macdonald, Ronald R. Swaisgood, Adi Barocas   +7 more
wiley   +1 more source

Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. V. Two Giant Planets in Kepler-511 but Only One Ran Away

The Astronomical Journal
Systems hosting multiple giant planets are important laboratories for understanding planetary formation and migration processes. We present a nearly decade-long Doppler spectroscopy campaign from the HIRES instrument on the Keck-I telescope to ...
Yayaati Chachan, Paul A. Dalba, Daniel P. Thorngren, Stephen R. Kane, Howard Isaacson, Eve J. Lee, Edward W. Schwieterman, Andrew W. Howard, Matthew J. Payne   +8 more
doaj   +1 more source

Electrodeposited Iron‐Incorporated Cobalt Phosphide for Improved Supercapacitor Applications

Advanced Energy and Sustainability Research, EarlyView.
The electrodeposition method has been used to synthesize Fe–CoP deposited on nickel foam, resulting in excellent cycling stability and capacitance retention compared to CoP and FeP. Furthermore, a detailed charge storage mechanism, emphasizing the enhanced electrochemical performance has been discussed. Supercapacitors have gained significant attention
Gaurav Pandey, Prashanth W. Menezes, Kamlendra Awasthi   +2 more
wiley   +1 more source