Results 81 to 90 of about 327,173 (294)

Visual binary stars: data to investigate formation of binaries [PDF]

Baltic astronomy (2016), Vol. 25, pp. 419-426, 2017
Statistics of orbital parameters of binary stars as well as statistics of their physical characteristics bear traces of star formation history. However, statistical investigations of binaries are complicated by lacking or incomplete observational data and by a number of observational selection effects.
arxiv  

Development of Ternary Magnesium Alloys for Laser Powder Bed Fusion: Optimizing Oxide Layer Thickness

Advanced Engineering Materials, EarlyView.
Additive manufacturing of magnesium alloys by laser is difficult because the melting point of the oxide layer is much higher than the evaporation temperature of the metal underneath. Making the oxide layer thinner can solve this problem. Alloying magnesium with strontium makes the oxide layer thinner, especially at 0.5 wt%.
Elmar Jonas Breitbach, Stefan Julmi, Sabine Behrens, Tatiana Blank, Arvid Abel, Nicole Emminghaus, Ludger Overmeyer, Christian Klose, Hans Jürgen Maier   +8 more
wiley   +1 more source

A High-resolution Imaging Survey of Massive Young Stellar Objects in the Magellanic Clouds

The Astrophysical Journal
Constraints on the binary fraction of massive young stellar objects (mYSOs) are important for binary and massive star formation theory. Here, we present speckle imaging of 34 mYSOs located in the Large Magellanic Cloud (1/2 Z _⊙ ) and Small Magellanic ...
Venu M. Kalari, Ricardo Salinas, Hans Zinnecker, Monica Rubio, Gregory Herczeg, Morten Andersen   +5 more
doaj   +1 more source

Frequentist confidence intervals for orbits

, 2014
The problem of efficiently computing the orbital elements of a visual binary while still deriving confidence intervals with frequentist properties is treated. When formulated in terms of the Thiele-Innes elements, the known distribution of probability in
Lucy, L. B.
core   +1 more source

A Novel Approach to Produce Metal–Metal Composites by Leveraging Immiscibility: Laser Powder Bed Fusion of Nanosilver‐Dispersed Titanium

Advanced Engineering Materials, EarlyView.
Incorporating nanosized silver into titanium for antimicrobial materials exploits the metastable miscibility gap between silver and titanium. Silver nanoparticles are synthesized via pulsed laser ablation in liquid. Silver addition refines the microstructure, increases hardness by 30%, and reduces Staphylococcus capitis microbial adhesion by 70%, with ...
Hamed Shokri, Silja‐Katharina Rittinghaus, Janett Schmelzer, Jessica Bertrand, Bilal Gökce   +4 more
wiley   +1 more source

GAIA and Population II Visual Binaries [PDF]

arXiv, 2002
The results of a kinematical population classification of 497 Hipparcos orbital binaries are discussed. Less than 10% of the stars from the sample belong to the thick disk. Only seven stars have halo kinematics. There are no direct dynamical mass determinations for extreme halo stars. Some suggestions, concerning Population II visual binaries for which
arxiv  

KupferDigital: Ontology‐Based Digital Representation for the Copper Life Cycle

Advanced Engineering Materials, EarlyView.
It is demonstrated how data from different stages in the life cycle of a copper product can be stored in an ontology‐based data space. In order to showcase the methods and tools used in the project, four use cases are presented that show how data from different sources can be semantically described and queried from a shared data space.
Miriam Eisenbart, Thomas Hanke, Felix Bauer, Hossein Beygi Nasrabadi, Kurt Junghanns, Gordian Dziwis, Ladji Tikana, Ashak Mahmud Parvez, Karl Gerald van den Boogaart, Mohsin Sajjad, Valerie Friedmann, Johannes Preußner, Anantha Narayanan Ramakrishnan, Sandy Klengel, Lars‐Peter Meyer, Michael Martin, Ulrich Ernst Klotz, Birgit Skrotzki, Matthias Weber   +18 more
wiley   +1 more source

X-Ray Sources in Multiple Stars [PDF]

arXiv, 2009
Luminous X-ray stars are very often found in visual double or multiple stars. Binaries with periods of a few days possess the highest degree of coronal X-ray activity among regular, non-relativistic stars because of their fast, tidally driven rotation.
arxiv  

Partitioning and Coarsening Dynamics of Precipitate‐Strengthened Cr‐Si Alloys: The Role of Ge, Pt, and Mo

Advanced Engineering Materials, EarlyView.
The microstructure of Cr‐rich Cr‐Si‐alloys is maintained by alloying with Ge, Pt, and Mo. The effects of these elements on A15‐phase fraction, partitioning, microstructural stability, grain size, and hardness are combinable. Molybdenum is found to be the most promising alloying element for microstructural stability during high‐temperature exposure.
Anke Silvia Ulrich, Petra Pfizenmaier, Michael Kerbstadt, Lucas Pelchen, Ali Solimani, Uwe Glatzel, Mathias Christian Galetz   +6 more
wiley   +1 more source

WASP-180Ab: Doppler tomography of a hot Jupiter orbiting the primary star in a visual binary [PDF]

Monthly Notices of the Royal Astronomical Society, 2019
ABSTRACT We report the discovery and characterization of WASP-180Ab, a hot Jupiter confirmed by the detection of its Doppler shadow and by measuring its mass using radial velocities. We find the 0.9  ±  0.1 MJup, 1.24  ±  0.04 RJup planet to be in a misaligned, retrograde orbit around an F7 star with Teff  =  6500 K and a moderate ...
Monika Lendl, Francesco Pepe, L. Y. Temple, Coel Hellier, Emmanuel Jehin, Amaury H. M. J. Triaud, Oliver Turner, Oliver Turner, Daniel F. Evans, C. Murray, Damien Ségransan, Khalid Barkaoui, Khalid Barkaoui, Susan E. Thompson, B. Zouhair, D. J. A. Brown, Don Pollacco, Michaël Gillon, Pierre F. L. Maxted, Louise D. Nielsen, Richard G. West, A. Collier Cameron, David R. Anderson, Barry Smalley, Elsa Ducrot, L. Delrez, D. Queloz, James McCormac, François Bouchy, Stéphane Udry, Artem Burdanov   +30 more
openaire   +6 more sources