Results 61 to 70 of about 35,527 (304)
Variabiity of young stellar objects: Accretion, disks, outflows, and magnetic activity [PDF]
Astronomische Nachrichten, 2015 AbstractVariability is a key characteristic of young stars. Two major origins may be distinguished: a scaled‐up version of the magnetic activity seen on main‐sequence stars and various processes related to circumstellar disks, accretion, and outflows. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
openaire +2 more sources
Atomic Size Misfit for Electrocatalytic Small Molecule Activation
Advanced Functional Materials, EarlyView.This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong +3 more
wiley +1 more source
Planet Formation Regulated by Galactic-scale Interstellar Turbulence
The Astrophysical Journal LettersPlanet formation occurs over a few Myr within protoplanetary disks of dust and gas, which are often assumed to evolve in isolation. However, extended gaseous structures have been uncovered around many protoplanetary disks, suggestive of late-stage infall
Andrew J. Winter +2 more
doaj +1 more source
Injunction Against Prosecution of Divorce Actions in Other States [PDF]
, 1940 Aims: The formation scenario of extended counter-rotating stellar disks in galaxies is still debated. In this paper, we study the S0 galaxy IC 719 known to host two large-scale counter-rotating stellar disks in order to investigate their formation ...
Coccato, L. +6 more
core +3 more sources
Laser‐Induced Graphene from Waste Almond Shells
Advanced Functional Materials, EarlyView.Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova +9 more
wiley +1 more source
A Semi-analytical Model for Stellar Evolution in AGN Disks
The Astrophysical JournalDisks of gas accreting onto supermassive black holes may host numerous stellar-mass objects, formed within the disk or captured from a nuclear star cluster.
Alexander J. Dittmann, Matteo Cantiello
doaj +1 more source
THE MECHANISM OF ANGULAR MOMENTUM TRANSFER IN ACCRETION STELLAR DISKS BY LARGE VORTICAL STRUCTURES
Odessa Astronomical Publications, 2012 Large-scale vortical flows arising in shear flows of stellar accretion disks with Keplerian azimuthal velocity distributions is investigated. The two reasons of the development of large-scale instability is shown: hydrodynamical instability and ...
A. Lugovskiy, V. Chechetkin, K. Sychugov
doaj +1 more source
Biomass Native Structure Into Functional Carbon‐Based Catalysts for Fenton‐Like Reactions
Advanced Functional Materials, EarlyView.This study indicates that eight biomasses with 2D flaky and 1D acicular structures influence surface O types, morphology, defects, N doping, sp2 C, and Co nanoparticles loading in three series of carbon, N‐doped carbon, and cobalt/graphitic carbon. This work identifies how these structural factors impact catalytic pathways, enhancing selective electron
Wenjie Tian +7 more
wiley +1 more source
Accreting Binary Eccentricities Follow Predicted Equilibrium Values
The Astrophysical JournalWe investigate observations of circumbinary disks (CBDs) to find evidence for an equilibrium eccentricity predicted by current binary accretion theory.
Allen R. Murray, Paul C. Duffell
doaj +1 more source
Fragmentation of Massive Protostellar Disks [PDF]
, 2006 We examine whether massive-star accretion disks are likely to fragment due to self-gravity. Rapid accretion and high angular momentum push these disks toward fragmentation, whereas viscous heating and the high protostellar luminosity stabilize them.
Adams +59 more
core +4 more sources