Results 41 to 50 of about 45,240 (301)

The occurrence of classical Cepheids in binary systems

, 2014
Classical Cepheids, like binary stars, are laboratories for stellar evolution and Cepheids in binary systems are especially powerful ones. About one-third of Galactic Cepheids are known to have companions and Cepheids in eclipsing binary systems have ...
Evans, Nancy R., Izzard, Robert G., Langer, Norbert, Neilson, Hilding R., Schneider, Fabian R. N.   +4 more
core   +1 more source

Hot Stars With Cool Companions [PDF]

, 2014
Young intermediate-mass stars have become high-priority targets for direct-imaging planet searches following the recent discoveries of planets orbiting e.g. HR 8799 and Beta Pictoris.
Dodson-Robinson, Sarah, Gullikson, Kevin, Kraus, Adam   +2 more
core   +3 more sources

Prospects of Electric Field Control in Perpendicular Magnetic Tunnel Junctions and Emerging 2D Spintronics for Ultralow Energy Memory and Logic Devices

Advanced Functional Materials, EarlyView.
Electric control of magnetic tunnel junctions offers a path to drastically reduce the energy requirements of the device. Electric field control of magnetization can be realized in a multitude of ways. These mechanisms can be integrated into existing spintronic devices to further reduce the operational energy.
Will Echtenkamp, Brahmdutta Dixit, Yifei Yang, Deyuan Lyu, Thomas Peterson, Qi Jia, Yu‐Chia Chen, Jian‐Ping Wang   +7 more
wiley   +1 more source

Characterization of the Host Binary of the Directly Imaged Exoplanet HD 143811 AB b

The Astrophysical Journal Letters
HD 143811 AB is the host star to the directly imaged planet HD 143811 AB b, which was recently discovered using data from the Gemini Planet Imager and Keck NIRC2.
Anne E. Peck, William Roberson, Eric L. Nielsen, Robert J. De Rosa, Nathalie Jones, Jason Wang, Bruce A. Macintosh, Briley L. Lewis, Gaspard Duchêne, Stanimir Metchev, Asif Abbas, Jerry W. Xuan, Aniket Sanghi, Jennifer Patience, Travis S. Barman, Joanna Bulger, Jeffrey K. Chilcote, Thomas M. Esposito, Michael P. Fitzgerald, Katherine B. Follette, Hannah Gallamore, Stephen Goodsell, James R. Graham, Alexandra Z. Greenbaum, Pascale Hibon, Patrick Ingraham, Paul Kalas, Quinn M. Konopacky, Franck Marchis, Jérôme Maire, Christian Marois, Brenda Matthews, Dimitri Mawet, Maxwell A. Millar-Blanchaer, Rebecca Oppenheimer, David W. Palmer, Marshall D. Perrin, Lisa Poyneer, Laurent Pueyo, Abhijith Rajan, Julien Rameau, Fredrik T. Rantakyrö, Bin Ren, Jean-Baptiste Ruffio, Dmitry Savransky, Adam C. Schneider, Anand Sivaramakrishnan, Adam J. R. W. Smith, Inseok Song, Remi Soummer, Sandrine Thomas, Kimberly Ward-Duong, Schuyler G. Wolff   +52 more
doaj   +1 more source

Discovery of the Exceptionally Short Period Ultracool Dwarf Binary LP 413-53AB

The Astrophysical Journal Letters, 2023
We report the detection of large-amplitude, rapid radial velocity (RV) variations and line-splitting in high-resolution Keck/NIRSPEC spectra of the M9 dwarf LP 413-53. We attribute these features to binary motion.
Chih-Chun Hsu, Adam J. Burgasser, Christopher A. Theissen   +2 more
doaj   +1 more source

The Smallest Mass Ratio Young Star Spectroscopic Binaries [PDF]

, 2002
Using high resolution near-infrared spectroscopy with the Keck telescope, we have detected the radial velocity signatures of the cool secondary components in four optically identified pre-main-sequence, single-lined spectroscopic binaries.
Baraffe I., Bate M. R., Covino E., D. Norman, Duquennoy A., I. S. McLean, L. Prato, M. Simon, Mazeh T., Rousselot P., S. Zucker, Siess L., T. Mazeh   +12 more
core   +3 more sources

Z‐Scheme Water Splitting Systems Based on Solid‐State Electron Conductors

Advanced Functional Materials, EarlyView.
This review examines the latest advances in Z‐scheme overall water splitting (OWS) systems for solar hydrogen production. These systems consist of suspended or immobilized hydrogen evolution photocatalysts (HEPs) and oxygen evolution photocatalysts (OEPs).
Chen Gu, Takashi Hisatomi, Tsuyoshi Takata, Kazunari Domen   +3 more
wiley   +1 more source

An observed population of intermediate-mass helium stars that have been stripped in binaries - Raw Spectroscopic Data

, 2023
M. R. Drout, Y. Götberg, Bethany Ludwig, J. H. Groh, S. E. de Mink, Anna J. G. O’Grady, Nathan Smith   +6 more
openalex   +2 more sources

The Long-period Spectroscopic Orbit and Dust Creation in the Wolf–Rayet Binary System WR 125

The Astrophysical Journal
Several long-period binaries with a carbon-rich Wolf–Rayet star and an OB star produce dust in their wind collisions. In eccentric binaries, this is seen most strongly near periastron passage.
Noel D. Richardson, Andrea R. Daly, Peredur M. Williams, Grant M. Hill, Victor I. Shenavrin, Izumi Endo, André-Nicolas Chené, Nicole Karnath, Ryan M. Lau, Anthony F. J. Moffat, Gerd Weigelt   +10 more
doaj   +1 more source

Positive‐Tone Nanolithography of Antimony Trisulfide with Femtosecond Laser Wet‐Etching

Advanced Functional Materials, EarlyView.
A butyldithiocarbamic acid (BDCA) etchant is used to fabricate various micro‐ and nanoscale structures on amorphous antimony trisulfide (a‐Sb2S3) thin film via femtosecond laser etching. Numerical analysis and experimental results elucidate the patterning mechanism on gold (reflective) and quartz (transmissive) substrates.
Abhrodeep Dey, Uwe Hübner, Albane Benardais, Xiaofei Wu, Andrea Dellith, Jan Dellith, Torsten Wieduwilt, Henrik Schneidewind, Markus A Schmidt, Virginie Nazabal, Volker Deckert, Jer‐Shing Huang, Wei Wang   +12 more
wiley   +1 more source