Results 131 to 140 of about 2,766,286 (295)

Enhanced magnetic activity in rapidly rotating binary stars

Stellar activity is fundamental to stellar evolution and the formation and habitability of exoplanets. Magnetic surface activity is driven by the interaction between convective motions and rotation in cool stars, resulting in a dynamo process.
Gizon, Laurent, Gehan, Charlotte, Nordhaus, Jason, Tayar, Jamie, Chen, Yajie, Gaulme, Patrick, Ting, Yuan-Sen, Murphy, Simon J., Bedding, Timothy R., Han, Zhanwen, Cameron, Robert H., Hekker, Saskia, Yu, Jie, Bi, Shaolan, Bazot, Michäel   +14 more
core   +1 more source

A Brown Dwarf Orbiting around the Planetary-nebula Central Binary KV Vel

The Astrophysical Journal
KV Vel is a noneclipsing short-period ( P = 0.3571 days) close binary containing a very hot subdwarf primary (77,000 K) and a cool low-mass secondary star (3400 K) that is located at the center of the planetary nebula DS 1.
S.-B. Qian, L.-Y. Zhu, F.-X. Li, L.-J. Li, Z.-T. Han, J.-J. He, L. Zang, L.-F. Chang, Q.-B. Sun, M.-Y. Li, H.-T. Zhang, F.-Z. Yan   +11 more
doaj   +1 more source

Revisiting Stability Criteria in Ball‐Milled High‐Entropy Alloys: Do Hume–Rothery and Thermodynamic Rules Equally Apply?

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez, Alejandro F. Manchón‐Gordón, Antonio Vidal‐Crespo, Rafael Caballero‐Flores, Jhon J. Ipus, Clara F. Conde   +5 more
wiley   +1 more source

MASS, ANGULAR-MOMENTUM, AND ENERGY-TRANSFER IN CLOSE BINARY STARS

, 2014
[[abstract]]The paper surveys some aspects of the dynamics and energetics of close binary stars which have heretofore not received a detailed review. Attention is directed to those processes of mass, angular momentum, and energy transfer that are thought
SHU F.H.;LUBOW S.H.
core  

Hidden Binaries in Star-forming Regions

The Astrophysical Journal
A significant fraction of, and possibly all, stars form in binary or multiple systems. For solar-mass stars in the Galactic field, the distribution of orbital separations is log-normal over 7 orders of magnitude, from 10 ^−2  to 10 ^5 au.
Mary H. Rawcliffe, Nathan Griffiths-Janvier, Richard J. Parker   +2 more
doaj   +1 more source

Microstructure Modification of Additively Manufactured Mo–9Si–8B by Annealing and Its Effects on High‐Temperature Mechanical Properties

Advanced Engineering Materials, EarlyView.
Postbuild annealing systematically modifies the phase fractions and morphology of EB‐PBF processed Mo–9Si–8B. Quantitative microstructure–property correlations reveal how controlled phase evolution enhances high‐temperature compressive strength and creep resistance.
Christopher Schmidt, Yong Chen, Georg Hasemann, Benjamin Wahlmann, Carolin Körner, Manja Krüger   +5 more
wiley   +1 more source

Long Photometric Cycles in Double-periodic Variables from Nodal Precession of a Tilted Accretion Disk

The Astrophysical Journal
We investigate whether the long photometric cycles observed in double-periodic variables (DPVs) can arise from nodal precession of a tilted accretion disk driven by the tidal torque of the companion.
Cheng-Liang Jiao, Er-gang Zhao, Liying Zhu, Azizbek Matekov   +3 more
doaj   +1 more source

Investigating the Effect of Inclination Angle and the Influence of Scan Parameters on the Appearance and Thermal and Mechanical Properties of Filigree Tension Rods of LPBF‐Manufactured NiTi Shape‐Memory Alloys

Advanced Engineering Materials, EarlyView.
This article investigates the dependence of the properties on the manufacturing orientation in the form of the inclination angle to the build plate of LPBF‐fabricated NiTi rods with a diameter of 150–220 µm. Metallographic, chemical, thermal, and mechanical characterization show behavior under identical manufacturing conditions that ranges from ...
Sandra Herzig, Michael Werner, Christian Rotsch   +2 more
wiley   +1 more source

Adaptive Foam 3D Printing of Ultralight and Multifunctional Materials

Advanced Engineering Materials, EarlyView.
Adaptive foam 3D printing, enabled by expandable microspheres, imparts cellular structures to thermoplastic and thermosetting polymers, manufactured through a variety of processes including fused filament fabrication, direct ink writing, digital light processing, and inkjet printing.
Nariman Rajabifar, Amir Ameli
wiley   +1 more source

High resolution measurements of close binary stars and the Probability Imaging technique

, 1996
International audienceWe report in this communication the rst experimental results in the visible range obtained by the Probability Imaging technique applied to close binary stars. Speckle data of the well known binary Del as well as the newly discovered
Carbillet, Marcel, Aristidi, E., Ricort, Gilbert, Aime, Claude   +3 more
core   +1 more source