Results 111 to 120 of about 232,000 (280)

The Orbit and Dynamical Mass of Polaris: Observations with the CHARA Array

The Astrophysical Journal
The 30 yr orbit of the Cepheid Polaris has been followed with observations by the Center for High Angular Resolution Astronomy (CHARA) Array from 2016 through 2021.
Nancy Remage Evans, Gail H. Schaefer, Alexandre Gallenne, Guillermo Torres, Elliott P. Horch, Richard I. Anderson, John D. Monnier, Rachael M. Roettenbacher, Fabien Baron, Narsireddy Anugu, James W. Davidson Jr., Pierre Kervella, Garance Bras, Charles Proffitt, Antoine Mérand, Margarita Karovska, Jeremy Jones, Cyprien Lanthermann, Stefan Kraus, Isabelle Codron, Howard E. Bond, Giordano Viviani   +21 more
doaj   +1 more source

Advances in Topological Thermoelectrics: Harnessing Quantum Materials for Energy Applications

Advanced Materials, EarlyView.
Topological materials offer a novel platform for thermoelectric energy conversion through unique band features, including band inversion, linear Dirac bands, surface states, and Berry curvature. These quantum characteristics enable enhanced longitudinal and transverse thermoelectric effects, establishing topological thermoelectrics as a promising ...
Guangsai Yang, Lina Sang, Chao Zhang, Khay See, Alex Hamilton, Michael Fuhrer, Ning Ye, G. Jeffrey Snyder, Xiaolin Wang   +8 more
wiley   +1 more source

Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. IV. Long-term Doppler Spectroscopy for 11 Stars Thought to Host Cool Giant Exoplanets

The Astrophysical Journal Supplement Series
Discovering and characterizing exoplanets at the outer edge of the transit method’s sensitivity has proven challenging owing to geometric biases and the practical difficulties associated with acquiring long observational baselines.
Paul A. Dalba, Stephen R. Kane, Howard Isaacson, Benjamin Fulton, Andrew W. Howard, Edward W. Schwieterman, Daniel P. Thorngren, Jonathan Fortney, Noah Vowell, Corey Beard, Sarah Blunt, Casey L. Brinkman, Ashley Chontos, Fei Dai, Steven Giacalone, Michelle L. Hill, Molly Kosiarek, Jack Lubin, Andrew W. Mayo, Teo Močnik, Joseph M. Akana Murphy, Erik A. Petigura, Malena Rice, Ryan A. Rubenzahl, Judah Van Zandt, Lauren M. Weiss, Diana Dragomir, David Kipping, Matthew J. Payne, Arpita Roy, Alex Teachey, Steven Villanueva Jr.   +31 more
doaj   +1 more source

Highly Efficient Platinum‐Free Photocatalytic Hydrogen Evolution From Low‐cost Conjugated Polymer Nanoparticles

Advanced Materials, EarlyView.
Platinum‐free hydrogen photocatalysis is achieved using dibenzothiophene‐S,S‐sulfoxide‐based conjugated polymers, self‐assembled into nanoparticles via nanoprecipitation. Through side chain engineering and donor–acceptor design, these materials reach a hydrogen evolution rate of 209 mmol g⁻¹ h⁻¹. The structure–function insights presented here establish
Alexandre Holmes, Jingwen Pan, Li Wang, Leandro Franco, Rafael R. Bicudo, Bo Albinsson, C. Moyses Araujo, Weiguo Zhu, Dongbo Wang, Thuc‐Quyen Nguyen, Jiefang Zhu, Ergang Wang   +11 more
wiley   +1 more source

Evaluation of the KASI Det

Journal of Astronomy and Space Sciences, 2018
The characterization of detectors installed in space- and ground-based instruments is important to evaluate the system performance. We report the development of a detector performance test system for astronomical applications using the Andor iKon M CCD
Young Sam Yu, Jinsol Kim, Chan Park, Woong-Seob Jeong, Minjin Kim, Seonghwan Choi, Sung-Joon Park   +6 more
doaj   +1 more source

Photothermal Boost of Laser‐Synthesized TiC Colloidal Variants with Engineered Solid‐State Interfaces and Nitridation

Advanced Materials, EarlyView.
TiC Colloidal variants are synthesized via a green and waste‐free laser fragmentation technique. The surface and elemental composition of the TiC colloids are tuned through laser‐induced carbon nucleation and nitridation while maintaining their crystal integrity. These changes maximize light–colloid interactions, thereby improving photo thermalization.
Farman Ullah, Reza Karimi, Holly M. Fruehwald, Rodney D. L. Smith, Joseph Sanderson, Kevin P. Musselman   +5 more
wiley   +1 more source

How Are the Abnormally Hot Chromosphere and Corona Heated by the Solar Magnetic Fields?

The Astrophysical Journal
The corona is a structure possessed by stars, including the Sun. The abnormal heating of the solar corona and chromosphere is one of the greatest mysteries in modern astronomy.
K. J. Li, J. C. Xu, W. Feng, J. L. Xie, X. J. Shi, L. H. Deng   +5 more
doaj   +1 more source

Flux and color variations of the quadruply imaged quasar HE 0435-1223

, 2011
We present VRi photometric observations of the quadruply imaged quasarHE0435-1223, carried out with the Danish 1.54 m telescope at the La Silla Observatory.
Ricci, D., Anguita A., Timo
openaire   +4 more sources

Detecting the Six Polytypes of Five‐Layer Graphite

Advanced Materials, EarlyView.
The six possible periodic crystals—so‐called polytypes of Penta layer graphene are identified using Raman, second harmonic, and electric surface potential measurements. The measurements reveal the polytypes’ abundance, relative stability, and annihilation dynamics, crucial for future multiferroic SlideTronic applications.
Nirmal Roy, Shaked Amitay, Simon Salleh Atri, Harel Kabla, Oren Ben Moshe, Moshe Ben Shalom   +5 more
wiley   +1 more source

Scalable Programming of LaAlO3/SrTiO3 Interfaces via Ultra‐Low‐Voltage Electron‐Beam Lithography

Advanced Materials Interfaces, EarlyView.
Ultra‐low‐voltage electron beam lithography (ULV‐EBL) enables rapid and scalable patterning of LaAlO3/SrTiO3 interfaces into nanowires, barriers, and waveguides that reveal 1D superconductivity, nonlinear current‐voltage response, and ballistic transport.
Dengyu Yang, Ranjani Ramachandran, Muqing Yu, Kitae Eom, Kyoungjun Lee, Patrick Irvin, Chang‐Beom Eom, Jeremy Levy   +7 more
wiley   +1 more source