Results 91 to 100 of about 20,557 (265)

Convection and differential rotation properties of G and K stars computed with the ASH code

, 2011
International audienceThe stellar luminosity and depth of the convective envelope vary rapidly with mass for G-and K-type main sequence stars. In order to understand how these properties influence the convective turbulence, differential rotation, and ...
Brun, A.S., Olivier Do Cao, Matt1, S.P., Brown, B.P., Benjamin P. Brown, Do Cao, O., Allan Sacha Brun, S.P. Matt, Sean P. Matt, B.P. Brown, O. Do Cao, A.S. Brun   +11 more
core   +1 more source

On the Lightweight Potential of Laser Additive Manufactured NiTi Triply Periodic Minimal Sheet Lattices

Advanced Engineering Materials, EarlyView.
This study explores the lightweight potential of laser additive‐manufactured NiTi triply periodic minimal surface sheet lattices. It systematically investigates the effects of relative density and unit cell size on surface quality, deformation recovery, compression behavior, and energy absorption.
Haoming Mo, Shuo Qu, Shiming Gao, Xu Song   +3 more
wiley   +1 more source

Limiting rotational period of neutron stars [PDF]

Physical Review D, 1992
Pulsars have been identified with the theoretical objects called neutron stars. The identification is convincing—but not proved. The short rotational periods of millisecond pulsars inform us that the average density (and, therefore, the central density) must be very high—higher than the density of nuclei (5.8).
openaire   +3 more sources

Prominences and magnetic activity on young single and binary stars

, 2008
In this thesis I study the magnetic activity of young stars via observations of stellar prominences on single stars and by applying the Zeeman Doppler imaging (ZDI) technique to map the magnetic fields and measure differential rotation of a young binary ...
Dunstone, Nicholas J.
core   +1 more source

A Workflow to Accelerate Microstructure‐Sensitive Fatigue Life Predictions

Advanced Engineering Materials, EarlyView.
This study introduces a workflow to accelerate predictions of microstructure‐sensitive fatigue life. Results from frameworks with varying levels of simplification are benchmarked against published reference results. The analysis reveals a trade‐off between accuracy and model complexity, offering researchers a practical guide for selecting the optimal ...
Luca Loiodice, Krzysztof S. Stopka, Michael D. Sangid   +2 more
wiley   +1 more source

Stellar chromospheric activity in main-sequence stars [PDF]

The research presented here presents a narrow slice of several largescale, ground-based astronomy surveys focused on chromospheric activity measurements of stars from the Keck Observatory.
Isaacson, Howard
core   +1 more source

Investigation of Laser Ablation and Brush Pre‐Treatments for AlCu Cold Roll Bonding in Oxygen‐Free Conditions

Advanced Engineering Materials, EarlyView.
It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti, Finn‐Lennard Janthur, Selina Raumel, Sascha Jan Zimmermann, Sarah Seffer, René Gustus, Sebastian Herbst, Marc C. Wurz, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Florian Nürnberger   +11 more
wiley   +1 more source

Rotating fermion-boson stars

Physical Review D
Rotating fermion-boson stars are hypothetical celestial objects that consist of both fermionic and bosonic matter interacting exclusively through gravity. Bosonic fields are believed to arise in certain models of particle physics describing dark matter and could accumulate within neutron stars, modifying some of their properties and gravitational wave ...
Mourelle, Jorge Castelo, Adam, Christoph, Bustillo, Juan Calderón, Sanchis-Gual, Nicolas   +3 more
openaire   +3 more sources

Rotation, differential rotation, and gyrochronology of active Kepler stars

, 2015
Context. In addition to the discovery of hundreds of exoplanets, the high-precision photometry from the CoRoT and Kepler satellites has led to measurements of surface rotation periods for tens of thousands of stars, which can potentially be used to infer
Gizon, Laurent, Reinhold, T., Timo Reinhold, Gizon, L., Laurent Gizon, Reinhold, Timo   +5 more
core   +1 more source

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source