Results 51 to 60 of about 50,322 (326)

Reconfigurable Metamirrors Based on Compliant Mechanisms

Advanced Functional Materials, EarlyView.
Providing the basis for numerous practical applications, the reconfigurability of metadevices is of great importance. Through the integration of controlled mechanical deformation with chiral meta‐atoms, a compliant mechanism based metamirror is demonstrated for active control over the polarization of electromagnetic waves.
Galestan Mackertich‐Sengerdy, Lei Kang, Sawyer D. Campbell, Douglas H. Werner   +3 more
wiley   +1 more source

Jormungandr: A Large Substructure Circling the Milky Way Identified from Gaia DR3 Data

The Astrophysical Journal
We report the discovery of a large substructure in the Milky Way passing through the solar neighborhood, detected in actions $\left({J}_{\phi },{J}_{{\rm{R}}}\right)$ calculated from Gaia DR3 data.
Xianhao Ye, Gang Zhao, Carlos Allende Prieto, Jingkun Zhao, Yong Yang, Wenbo Wu   +5 more
doaj   +1 more source

SPar: Estimating Stellar Parameters from Multiband Photometries with Empirical Stellar Libraries

The Astronomical Journal, 2023
Modern large-scale photometric surveys have provided us with multiband photometries of billions of stars. Determining the stellar atmospheric parameters, such as the effective temperature ( T _eff ) and metallicities ([Fe/H]), absolute magnitudes ( M _G )
Mingxu Sun, Bingqiu Chen, Helong Guo, He Zhao, Ming Yang, Wenyuan Cui   +5 more
doaj   +1 more source

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

Advanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou, Yu Mao, Mengyao Chang, Ziyun Wang, Wenke Xie, Cuizhu Ye, Shanghai Wei, Lars Thomsen, Geoffrey I. N. Waterhouse   +8 more
wiley   +1 more source

Kinematic Age of the β-Pictoris Moving Group

The Astrophysical Journal
Accurate age estimation of nearby young moving groups (NYMGs) is important as they serve as crucial testbeds in various fields of astrophysics, including the formation and evolution of stars and planets, as well as loose stellar associations.
Jinhee Lee, Inseok Song
doaj   +1 more source

The SAMI Galaxy Survey: Unveiling the nature of kinematically offset active galactic nuclei

, 2015
We have observed two kinematically offset active galactic nuclei (AGN), whose ionised gas is at a different line-of-sight velocity to their host galaxies, with the SAMI integral field spectrograph (IFS).
Allen, J. T., Bland-Hawthorn, J., Bryant, J. J., Croom, S. M., Fogarty, L. M. R., Goodwin, M., Green, A. W., Ho, I. -T., Konstantopoulos, I. S., Lawrence, J. S., Leslie, S. K., Medling, A. M., Owers, M. S., Richards, S. N., Schaefer, A. L., Scott, N., Sharp, R.   +16 more
core   +1 more source

Observation of Relativistic Domain Wall Motion in Amorphous Ferrimagnets

Advanced Functional Materials, EarlyView.
Domain walls in ferrimagnets and antiferromagnets move as relativistic sine‐Gordon solitons, with the spin‐wave velocity setting their speed limit. Such relativistic domain‐wall motion is demonstrated in amorphous GdFeCo near angular momentum compensation, where current‐driven walls reach 90% of the 2 kms−1 spin‐wave speed, enabling ultrafast, device ...
Pietro Diona, Luca Maranzana, Sergey Artyukhin, Giacomo Sala   +3 more
wiley   +1 more source

The MASSIVE Survey. XX. A Triaxial Stellar Dynamical Measurement of the Supermassive Black Hole Mass and Intrinsic Galaxy Shape of Giant Radio Galaxy NGC 315

The Astrophysical Journal
We present a new dynamical measurement of the supermassive black hole mass and intrinsic shape of the stellar halo of the massive radio galaxy NGC 315 as part of the MASSIVE survey.
Jacob Pilawa, Emily R. Liepold, Chung-Pei Ma, Jonelle L. Walsh, Jenny E. Greene   +4 more
doaj   +1 more source

Nonextensive Behavior of Stellar Rotation in the Galactic Disk Components

The Astrophysical Journal, 2023
The solar neighborhood is a unique stellar astrophysical laboratory formed by a variety of stars from different origins. In particular, two of the most notable populations known are the thick and thin disk stars, each characterized by distinct chemical ...
M. P. da Silva, M. M. F. de Lima, E. N. Velloso, J.-D. do Nascimento Jr.   +3 more
doaj   +1 more source

2D mapping of young stars in the inner 180 pc of NGC 1068: correlation with molecular gas ring and stellar kinematics [PDF]

, 2012
We report the first two-dimensional mapping of the stellar population and non-stellar continua within the inner 180 pc (radius) of NGC 1068 at a spatial resolution of 8 pc, using integral field spectroscopy in the near-infrared.
Cid Fernandes, Crenshaw, Davies, García-Lorenzo, Gerhard, Krips, Marco, Marlon R. Diniz, Matsushita, Müller-Sánchez, Peter J. McGregor, Riffel, Riffel, Riffel, Rogemar A. Riffel, Rogério Riffel, Sakamoto, Schinnerer, Schmitt, Storchi-Bergmann, Storchi-Bergmann, Thaisa Storchi-Bergmann, Thatte, Tibério Borges Vale, Vale, Winge   +25 more
core   +2 more sources