Results 41 to 50 of about 4,313 (174)

A chemical study of M67 candidate blue stragglers and evolved blue stragglers observed with APOGEE DR14 [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
Within the variety of objects populating stellar clusters, blue straggler stars (BSSs) are among the most puzzling ones. BSSs are commonly found in globular clusters, but they are also known to populate open clusters of the Milky Way. Two main theoretical scenarios (collisions and mass transfer) have been suggested to explain their formation, although ...
Bertelli Motta, Clio, Pasquali, Anna, Caffau, Elisabetta, Grebel, Eva K., Bertelli motta, Clio, Grebel, Eva   +5 more
openaire   +3 more sources

Thickness‐Dependent Skyrmion Evolution in Fe3GeTe2 During Magnetization Reversal

Advanced Functional Materials, EarlyView.
Thickness‐ and field‐dependent magnetic domain behavior in 2D van der Waals Fe3GeTe2 is studied using Lorentz TEM and micromagnetic simulations. A patch‐like domain phase evolves from skyrmions during magnetization reversal, and step edges between thickness regions act as pinning sites.
Jennifer Garland, John Fullerton, PeiYu Cai, Rabindra Basnet, Santosh Karki Chhetri, Jin Hu, Elton J. G. Santos, Yue Li, Charudatta Phatak, Amanda Petford‐Long   +9 more
wiley   +1 more source

The Blue Straggler Stars of Galactic Clusters [PDF]

International Astronomical Union Colloquium, 1993
AbstractThe origin and evolution of blue straggler stars (BS) in clusters is still an unsolved problem for our understanding of stellar evolution. Several rivalling theories exist, of which that of Saio & Wheeler (1980) is the most interesting one since it assumes additional mixing of fuel in the interior of BS.
D. SchÖNberner, R. Napiwotzki
openaire   +1 more source

Novel 3D‐Printed Biophotonic Scaffold Displaying Luminescence under Near‐Infrared Light for Photopharmacological Activation and Biological Signaling Compound Release

Advanced Healthcare Materials, EarlyView.
Despite significant efforts in developing novel biomaterials to regenerate tissue, only a few of them have successfully reached clinical use. It has become clear that the next generation of biomaterials must be multifunctional. Smart biomaterials can respond to environmental or external stimuli, interact in a spatial‐temporal manner, and trigger ...
Sonya Ghanavati, Ekin Opar, Virginia Alessandra Gobbo, Carlo Matera, Fabio Riefolo, Rossella Castagna, Julien Colombelli, Andrew Draganski, Joshua Baggott, Mika Lastusaari, Pau Gorostiza, Laeticia Petit, Jonathan Massera   +12 more
wiley   +1 more source

Multiple stellar populations and their influence on blue stragglers

, 2010
It has become clear in recent years that globular clusters are not simple stellar populations, but may host chemically distinct sub-populations, typically with an enhanced helium abundance. These helium-rich populations can make up a substantial fraction
Alexander, Alison Sills, Anders, Angulo, Bedin, Buchler, Böhm-Vitense, Campbell, Cassisi, Chen, Chen, Chen, D'Antona, D'Ercole, De Mink, Dearborn, Decressin, Eggleton, Eggleton, Eldridge, Evert Glebbeek, Ferraro, Ferraro, Ferraro, Formicola, Fujimoto, Fusi Pecci, Glebbeek, Glebbeek, Gratton, Han, Harris, Herwig, Härm, Iben, Iglesias, Kippenhahn, Kippenhahn, Knigge, Kroupa, Leigh, Leigh, Lejeune, Lejeune, Lombardi, Lombardi, Milone, Mocák, Nathan Leigh, Pancino, Piotto, Piotto, Piotto, Pols, Pols, Portegies Zwart, Refsdal, Renzini, Sandage, Saviane, Schlegel, Schröder, Schröder, Sills, Sills, Sills, Sills, Stancliffe, Stancliffe, Ventura, Ventura, Ventura, Ventura, Walker   +73 more
core   +1 more source

Spectroscopic and asteroseismic analysis of the remarkable main-sequence A star KIC 11145123 [PDF]

, 2017
A spectroscopic analysis was carried out to clarify the properties of KIC 11145123 -- the first main-sequence star with a determination of core-to-surface rotation -- based on spectra observed with the High Dispersion Spectrograph (HDS) of the Subaru ...
Kurtz, Donald W., Murphy, Simon J., Saio, Hideyuki, Sekii, Takashi, Shibahashi, Hiromoto, Takada-Hidai, Masahide, Takata, Masao   +6 more
core   +2 more sources

The Promise of Solid Lubricants for a Sustainable Future

Advanced Materials, EarlyView.
Lubricants are vital for technology, saving energy and resources. The industry seeks sustainable solutions beyond fossil fuels. Solid lubricants offer extremely low friction and reduce environmental impact, especially in harsh conditions. Can these solids truly replace liquid lubricants, or are they limited to extreme applications?
Philipp G. Grützmacher, Andrey A. Voevodin, András Korényi‐Both, Maria Clelia Righi, Christopher DellaCorte, Nazlim Bagcivan, Ali Erdemir, Carsten Gachot   +7 more
wiley   +1 more source

Néel Tensor Torque in Polycrystalline Antiferromagnets

Advanced Materials, EarlyView.
This work introduces a Néel tensor torque based on a rank‐two symmetric tensor capturing spin correlations in a polycrystalline antiferromagnet. It shows the Néel tensor can be shaped and reshaped through the spin‐orbit torque (SOT) technique, enabling field‐free SOT switching with a specific polarity of the adjacent ferromagnet. This discovery opens a
Chao‐Yao Yang, Sheng‐Huai Chen, Chih‐Hsiang Tseng, Hsiu‐Hau Lin, Chih‐Huang Lai   +4 more
wiley   +1 more source

The First Detection of Blue Straggler Stars in the Milky Way Bulge

, 2011
We report the first detections of Blue Straggler Stars (BSS) in the bulge of the Milky Way galaxy. Proper motions from extensive space-based observations along a single sight-line allow us to separate a sufficiently clean and well-characterized bulge ...
Albrow, Alvio Renzini, Andronov, Aparicio, Brown, Brown, Bureau, Carney, Carrera, Clarkson, Combes, Dante Minniti, Davies, Ferraro, Freeman, Gilliland, Howard E. Bond, Jay Anderson, Kailash C. Sahu, Kroupa, Kuijken, Lanzoni, Latham, Livio, Manuela Zoccali, Mario Livio, Mateo, Mateo, McCrea, McWilliam, McWilliam, Nataf, Nataf, Perets, Piotto, Preston, R. Michael Rich, T. Ed. Smith, Thomas M. Brown, van der Marel, W. I. Clarkson   +40 more
core   +1 more source

Rapid Fabrication of Self‐Propelled and Steerable Magnetic Microcatheters for Precision Medicine

Advanced Materials, EarlyView.
A rapid Joule heating fabrication method for the production of self‐propelling, adaptive microcatheters, with tunable stiffness and integrated microfluidic channels is presented. Demonstrated through three microrobotic designs, including a steerable guiding catheter, an untethered wave‐crawling TubeBot, and a distal‐end propelled microcatheter, it was ...
Zhi Chen, Boris Rivkin, David Castellanos‐Robles, Ivan Soldatov, Lukas Beyer, Mariana Medina‐Sánchez   +5 more
wiley   +1 more source