Results 31 to 40 of about 407 (188)

Blue straggler stars in dwarf spheroidal galaxies - II. Sculptor and Fornax [PDF]

Monthly Notices of the Royal Astronomical Society, 2009
The existence of blue straggler stars (BSSs) in dwarf spheroidal galaxies (dSphs) is still an open question. In fact, many BSS candidates have been observed in the Local Group dSphs, but it is unclear whether they are real BSSs or young stars. Shedding light on the nature of these BSS candidates is crucial, in order to understand the star formation ...
Mapelli, M., Ripamonti, E., Battaglia, G., Tolstoy, E., Irwin, M. J., Moore, B., Sigurdsson, S.   +6 more
openaire   +4 more sources

Blue Straggler Stars Beyond the Milky Way. III. Detection of Evolved Blue Straggler Candidates in Large Magellanic Cloud Clusters [PDF]

The Astronomical Journal, 2018
Abstract We analyze Hubble Space Telescope observations of nine Large Magellanic Cloud star clusters with ages of 1–2 Gyr to search for evolved counterparts of blue straggler stars. Near the red clump regions in the clusters’ color–magnitude diagrams, we find branches of evolved stars that are much brighter than normal evolved stars.
Chengyuan Li, Licai Deng, Kenji Bekki, Jongsuk Hong, Richard de Grijs, Bi-Qing For   +5 more
openaire   +2 more sources

Fractional Skyrmion Tubes in Chiral‐Interfaced 3D Magnetic Nanowires

Advanced Functional Materials, EarlyView.
In chiral 3D helical magnetic nanowires, the coupling between the geometric and magnetic chirality provides a way to create topological spin states like vortex tubes. Here, it is demonstrated how the breaking of this coupling in interfaced 3D nanowires of opposite chirality leads to even more complex topological spin states, such as fractional ...
John Fullerton, Naëmi Leo, Jakub Jurczyk, Claire Donnelly, Dédalo Sanz‐Hernández, Luka Skoric, Nicholas Mille, Stefan Stanescu, Donald A MacLaren, Rachid Belkhou, Aurelio Hierro‐Rodriguez, Amalio Fernández‐Pacheco   +11 more
wiley   +1 more source

Two‐Dimensional Materials as a Multiproperty Sensing Platform

Advanced Functional Materials, EarlyView.
Various sensing modalities enabled and/or enhanced by two‐dimensional (2D) materials are reviewed. The domains considered for sensing include: 1) optoelectronics, 2) quantum defects, 3) scanning probe microscopy, 4) nanomechanics, and 5) bio‐ and chemosensing.
Dipankar Jana, Shubhrasish Mukherjee, Dmitrii Litvinov, Magdalena Grzeszczyk, Sergey Grebenchuk, Makars Šiškins, Virgil Gavriliuc, Yihang Ouyang, Changyi Chen, Yuxuan Ye, Meng Yiming, Maciej Koperski   +11 more
wiley   +1 more source

First Evidence of Circumstellar Disks around Blue Straggler Stars [PDF]

The Astrophysical Journal, 2004
Accepted by ApJ Letters 10 pages, 2 ...
De Marco, Orsola, Lanz, Thierry, Ouellette, John A., Zurek, David, Shara, Michael M.   +4 more
openaire   +2 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

Blue straggler stars in Galactic open clusters and the effect of field star contamination [PDF]

Astronomy & Astrophysics, 2008
11 pages, 4 figurs, in press as Research Note in A& ...
CARRARO, GIOVANNI, R. A. Vázquez, A. Moitinho   +2 more
openaire   +4 more sources

Surface Diffusion in SnTe‐PbTe Monolayer Lateral Heterostructures

Advanced Functional Materials, EarlyView.
The lateral heterostructures between 2D materials often suffer from the interdiffusion at the interfaces. Here, a surface diffusion mechanism is found to be dominating at the interfaces between semiconducting SnTe and PbTe monolayers. Atomically sharp interfaces can be achieved by suppressing this diffusion process. ABSTRACT The construction of complex
Jing‐Rong Ji, Zi'Ang Gao, Shiva Prasad Poudel, Rui‐Qi Cao, Tianzhe Chen, Luxin Li, Chong Liu, Salvador Barraza‐Lopez, Stuart S. P. Parkin, Kai Chang   +9 more
wiley   +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

Blue straggler stars

This is a pre-print of a chapter for the Encyclopedia of Astrophysics (edited by I. Mandel, section editor F.R.N.
Wang, Chen, Ryu, Taeho
openaire   +2 more sources