Results 81 to 90 of about 736 (237)
Visual Orbits & Alignments of Planet Hosting Binary Systems
, 2023 Roughly half of Solar-type planet hosts have stellar companions, so understanding how these binary companions affect the formation and evolution of planets is an important component to understanding planetary systems overall.
Gnilka, Crystal +9 more
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Long-term Spectroscopic Survey of the Hyades Cluster: The Binary Population
The Astrophysical Journal Supplement SeriesWe report the results of a radial velocity monitoring program in the Hyades region, carried out at the Center for Astrophysics over a period of more than 45 yr.
Guillermo Torres +2 more
doaj +1 more source
Ferroelectricity in Antiferromagnetic Wurtzite Nitrides
Advanced Functional Materials, EarlyView.We establish MnSiN2${\rm MnSiN}_2$ and MnGeN2${\rm MnGeN}_2$ as aristotypes of a new multiferroic wurtzite family that simultaneously exhibits ferroelectricity and antiferromagnetism with altermagnetic spin splitting. By strategically substituting alkaline‐earth metals, we predict new materials with coexisting switchable polarization, spin texture, and
Steven M. Baksa +3 more
wiley +1 more source
Southern Binaries with the Zorro Speckle Camera @ Gemini South
The Astronomical JournalWe present measurements in the context of a survey of southern hemisphere binary and multiple stellar systems observed with the Zorro Speckle dual diffraction-limited optical imaging camera on the 8.1 m Gemini South telescope carried out between 2019 and
Rene A. Mendez +3 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Optoelectronic synaptic devices based on solution‐processed molecular telluride GST‐225 phase‐change inks are demonstrated for three‐factor learning. A global optical signal broadcast through a silicon waveguide induces non‐volatile conductance updates exclusively in locally electrically flagged memristors.
Kevin Portner +14 more
wiley +1 more source
, 1906 Aitken (R. -G.). — A Catalogue of the orbits of visual binary stars. (Lick Observatory Bulletin. n° 84.). In: Bulletin astronomique, tome 23, 1906.
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Some Aspects of Visual Binary Star Orbit Determination [PDF]
International Astronomical Union Colloquium, 1983 The problem under consideration is that of determining the seven elements (the vector ) characterizing the relative three-dimensional motion of the components of a binary star, using observations of the two-dimensional projection on the sky of the relative positions of those components as a function of time.
openaire +1 more source
Advanced Functional Materials, EarlyView.Oxygen‐tunnel (OT) indium tin oxide (ITO) vertical channel transistors (VCTs) enable reliable, high‐density gain‐cell memory for monolithic 3D integration. A sandwiched SiN/SiO2/SiN OT stack selectively regulates oxygen transport, suppressing parasitic electrode oxidation while stabilizing channel oxygen vacancies, thereby suppressing carrier injection
Hyeonho Gu +17 more
wiley +1 more source
A Spectroscopic Survey for Binary Stars in the Globular Cluster NGC 5053 [PDF]
, 1996 We carried out a radial velocity survey for spectroscopic binaries in the low density globular cluster NGC 5053. Our sample contains a total of 77 cluster member giant and subgiant stars with visual magnitudes of 14.5-18.6.Of these 77 stars, 66 stars ...
Yan, Lin, Cohen, J. G.
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The Discovery of Three Galactic Wolf–Rayet Stars
The Astronomical JournalWolf–Rayet stars (WRs) are evolved massive stars in the brief stage before they undergo core collapse. Not only are they rare, but they also can be particularly difficult to find due to the high extinction in the Galactic plane.
Laurella C. Marin +3 more
doaj +1 more source