Results 81 to 90 of about 531,438 (331)

Structure, kinematics, and ages of the young stellar populations in the Orion region [PDF]

Astronomy & Astrophysics, 2019
We present a study of the three dimensional structure, kinematics, and age distribution of the Orion OB association, based on the second data release of the Gaia satellite (Gaia DR2). Our goal is to obtain a complete picture of the star formation history
E. Zari, Anthony G. A. Brown, P. Zeeuw
semanticscholar   +1 more source

Entangled Multistable Origami with Reprogrammable Stiffness Amplification and Damping

Advanced Functional Materials, EarlyView.
This study introduces a class of origami‐inspired metamaterials that overcome the limitations of existing multistable metamaterials by eliminating the need for rigid lateral confinements. Panel entanglement, snap‐through interactions, and instabilities synergy enable them to achieve extensive shape‐shifting, enhanced stiffness, and remarkable energy ...
Amin Jamalimehr, Abdolhamid Akbarzadeh, Damiano Pasini   +2 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

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

SDSSJ150634.27+013331.6: the second compact elliptical galaxy in the NGC5846 group

, 2010
We report the discovery of the second compact elliptical (cE) galaxy SDSSJ150634.27+013331.6 in the nearby NGC5846 group by the Virtual Observatory (VO) workflow .
Abazajian, Bekki, Bekki, Bertin, Cappellari, Chilingarian, Chilingarian, Chilingarian, Chilingarian, Chilingarian, Chilingarian, Chilingarian, Davidge, Djorgovski, Drinkwater, Eigenthaler, Emsellem, Faber, Ferrarese, Fioc, Gilles Bergond, Graham, Graham, Hewett, Hilker, Igor V. Chilingarian, Jordi, Karick, Kormendy, Kroupa, Lawrence, Le Borgne, Matteucci, Mieske, Mieske, Price, Roth, Salpeter, Schlegel, Simien, Smith Castelli, Smith Castelli, Spitzer, Sérsic, Thomas, Tully, Worthey   +46 more
core   +1 more source

The stellar kinematics of corotating spiral arms in Gaia mock observations [PDF]

, 2015
We have observed an N-body/Smoothed Particle Hydrodynamics simulation of a Milky Way like barred spiral galaxy. We present a simple method that samples N-body model particles into mock Gaia stellar observations and takes into account stellar populations,
Jason A. S. Hunt, D. Kawata, R. Grand, I. Minchev, S. Pasetto, M. Cropper   +5 more
semanticscholar   +1 more source

Multiband Switchable Microwave Absorbing Metamaterials Based on Reconfigurable Kirigami–Origami

Advanced Functional Materials, EarlyView.
A reconfigurable metamaterial featuring tunable microwave‐absorbing and load‐bearing performance is proposed. Stretchable kirigami and bistable origami configurations are integrated as actuating components, and the synergistic deformation mechanisms are systematically analyzed.
Weimin Ding, Zhong Zhang, Zeang Zhao, Shengyu Duan, Panding Wang, Xiaogang Guo, Hongshuai Lei, Daining Fang   +7 more
wiley   +1 more source

Spectral decomposition of the stellar kinematics in the polar disk galaxy NGC 4650A [PDF]

, 2014
Context. The prototype of Polar Ring Galaxies NGC 4650A contains two main structural components, a central spheroid, which is the host galaxy, and an extended polar disk.
Arnaboldi, M., Coccato, L., Iodice, E.
core   +1 more source

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