Results 71 to 80 of about 41,311 (309)

X‐Ray Tomography Analysis of Damage Mechanisms in Metal Matrix Syntactic Foams During Compression

Advanced Engineering Materials, EarlyView.
In situ synchrotron X‐ray tomography is used to investigate the internal damage mechanisms of AlSi12 metal matrix syntactic foam with ceramic hollow spheres during compressive loading. It is concluded that a homogeneous distribution of the second‐phase filler material results in a sequential collapse in a localized region; this leads to controlled and ...
Indrajeet Tambe, János Endre Maróti, Imre Norbert Orbulov, Zoltan Hegedűs, Markus Ziehmer, Carl E. Krill III, Håkan Hallberg, Pär A. T. Olsson, Johan Hektor   +8 more
wiley   +1 more source

QPEs from EMRI Debris Streams Impacting Accretion Disks in Galactic Nuclei

The Astrophysical Journal
Quasi-periodic eruption (QPE) sources in galactic nuclei are often associated with a stellar object orbiting a supermassive black hole with an hours to days period, which is brought in as an extreme mass-ratio inspiral (EMRI).
Itai Linial, Brian D. Metzger, Eliot Quataert   +2 more
doaj   +1 more source

Models of Individual Blue Stragglers

, 2014
This chapter describes the current state of models of individual blue stragglers. Stellar collisions, binary mergers (or coalescence), and partial or ongoing mass transfer have all been studied in some detail.
A. Hypki, A. Maeder, A. Procter Sills, A. Sills, A. Sills, A. Sills, A. Sills, A. Sills, A. Sills, B. Tian, C. A. Nelson, C. D. Bailyn, D. Lauterborn, E. Gaburov, E. Glebbeek, E. Glebbeek, E. Glebbeek, E. Glebbeek, E. L. Sandquist, F. D’Antona, J. A. Ouellette, J. C. Lombardi Jr, J. C. Lombardi Jr, J. C. Lombardi Jr, J. G. Hills, J. R. Hurley, K. Belczynski, M. Templeton, N. Ivanova, N. Ivanova, P. J. T. Leonard, P. Lu, P. Santolamazza, R. E. Cohen, R. Kippenhahn, S. Chatterjee, S. D. Kawaler, S. F. Portegies Zwart, S. J. Aarseth, S. Matt, S. Portegies Zwart, W. Benz, X. Chen, X. Chen, X. Chen   +44 more
core   +1 more source

Tidal spin-up of stars in dense stellar cusps around massive black holes [PDF]

, 2000
We show that main-sequence stars in dense stellar cusps around massive black holes are likely to rotate at a significant fraction of the centrifugal breakup velocity due to spin-up by hyperbolic tidal encounters. We use realistic stellar structure models
Brandt J. C., Genzel R., Gingold R. A., Kippenhahn R., Meylan G., Monaghan J. J., Pawan Kumar, Royczka M., Ruffert M., Schaerer D., Tal Alexander, Zahn J.-P.   +11 more
core   +3 more sources

Heating of stellar systems by binary collisions [PDF]

Monthly Notices of the Royal Astronomical Society, 1983
On a utilise des resultats d'integrations numeriques de rencontres binaire-binaire aleatoires pour etudier le chauffage et la perte de masse des systemes stellaires denses par suite de collisions binaires. On en deduit une simulation des collisions binaires dans un systeme a distribution des vitesses presque maxwellienne.
openaire   +1 more source

Red giant stellar collisions in the Galactic Centre [PDF]

Monthly Notices of the Royal Astronomical Society, 2009
We show that collisions with stellar--mass black holes can partially explain the absence of bright giant stars in the Galactic Centre, first noted by Genzel et al, 1996. We show that the missing objects are low--mass giants and AGB stars in the range 1-3 M$_{\odot}$.
Dale, James E., Davies, Melvyn B., Church, Ross P., Freitag, Marc   +3 more
openaire   +2 more sources

Advancing Research on Biomaterials and Biological Materials with Scanning Electron Microscopy under Environmental and Low Vacuum Conditions

Advanced Engineering Materials, EarlyView.
Herein, environmental scanning electron microscopy (ESEM) is discussed as a powerful extension of conventional SEM for life sciences. By combining high‐resolution imaging with variable pressure and humidity, ESEM allows the analysis of untreated biological materials, supports in situ monitoring of hydration‐driven changes, and advances the functional ...
Jendrian Riedel, Lea Dierker, Antoine Eyram Kwame, Kim Nora Wagner, Jonas J. Unterholzner, Jan‐Henning Dirks, Dorothea Brüggemann   +6 more
wiley   +1 more source

The pure non-collisional Blue Straggler population in the giant stellar system omega Centauri

, 2005
We have used high spatial resolution data from the Hubble Space Telescope and wide-field ground-based observations to search for blue straggler stars (BSS) over the entire radial extent of the large stellar system omega Centauri.
Bellazzini, M., Ferraro, F. R., Origlia, L., Pancino, E., Rood, R. T., Sollima, A.   +5 more
core   +2 more sources

Frequency of Stellar Collisions in Three-Body Heating [PDF]

Symposium - International Astronomical Union, 1996
The probability for collisional interaction of three body binaries is calculated as a function of the physical radius and mass of the stellar objects and the depth of the cluster potential well. For typical cluster parameters, there is a significant chance of physical collision for objects as small as white dwarfs.
David F. Chernoff, Xiaolan Huang
openaire   +1 more source

Fabrication of Multifunctional FeSi Gyroid Lattice Composites via Additive Manufacturing and Polymer Infiltration

Advanced Engineering Materials, EarlyView.
A two‐step approach combining laser powder bed fusion of FeSi electrical steel with Bakelite infiltration enables the fabrication of multifunctional gyroid lattice composites. The resulting structures exhibit high strength, magnetic anisotropy, and complete polymer infiltration, demonstrating a simple and scalable route toward lightweight, mechanically
Angelo F. Andreoli, Mayumi A. Nakahashi, Vitor E. Pinotti, Felipe O. C. Bernardo, Lidiane C. Costa, Francisco G. Coury, Ronei C. de Oliveira, Adilson J. A. de Oliveira, Carlos E. H. Ventura, Piter Gargarella   +9 more
wiley   +1 more source