Results 71 to 80 of about 278,885 (252)

A Galactic Transformation—Understanding the SMC’s Structural and Kinematic Disequilibrium

The Astrophysical Journal
The SMC is in disequilibrium. Gas line-of-sight (LOS) velocity maps show a gradient of 60–100 km s ^−1 , generally interpreted as a rotating gas disk consistent with the Tully–Fisher relation. Yet, the stars don’t show rotation.
Himansh Rathore, Gurtina Besla, Roeland P. van der Marel, Nitya Kallivayalil   +3 more
doaj   +1 more source

Re-visiting the Canis Major star-forming region with Gaia data release 3 data

Astronomy & Astrophysics
Context. The Canis Major (CMa) star-forming region, a remote molecular cloud complex within the recently discovered Radcliffe Wave, remains under-explored in the literature. Aims.
Nogueira-Silva S., Galli P. A. B., Olivares J., Bouy H., Popowicz B. P., Merino P. M., Santos-Silva T., Gregorio-Hetem J., Miret-Roig N., Alves J.   +9 more
doaj   +1 more source

Programming Actuation in 3D‐Printed Micro‐Architectures via Interfacial Adhesion Control

Advanced Materials Technologies, EarlyView.
A two‐phase meniscus‐guided 3D printing method directly fabricates microscale poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and poly(vinyl alcohol) (PVA) bilayers with in situ programmable interfaces. Modulating the meniscus stretching speed switches the interface between separated and bonded states, which controls the mechanical ...
Xiao Huan, Juhyung Kim, Yujin Park, Shiqi Hu, Jihyuk Yang, Nan Huang, Feipeng Chen, Yu Liu, Sixi Cao, Zhuoran Wang, Ho Cheung Shum, Barbara Pui Chan, Dongwoon Shin, Ji Tae Kim   +13 more
wiley   +1 more source

A JWST/MIRI View of the Interstellar Medium in M83. I. Resolved Molecular Hydrogen Properties, Star Formation, and Feedback

The Astrophysical Journal
We present a spatially resolved (∼3 pc pixel ^−1 ) analysis of the distribution, kinematics, and excitation of warm H _2 gas in the nuclear starburst region of M83.
Logan H. Jones, Svea Hernandez, Linda J. Smith, Aditya Togi, Tanio Diaz-Santos, Alessandra Aloisi, William Blair, Alec S. Hirschauer, Leslie K. Hunt, Bethan L. James, Nimisha Kumari, Vianney Lebouteiller, Matilde Mingozzi, Lise Ramambason   +13 more
doaj   +1 more source

Uncovering the dark matter distribution by combining stellar kinematics and integrated H I spectra: Method validation

Astronomy & Astrophysics
We determined the dark matter (DM) distribution in galaxies by jointly modelling stellar kinematics from integral field unit (IFU) observations and the gaseous kinematics encoded in a single integrated neutral hydrogen (H I ) spectrum.
Lei Yu, Yang Meng, Zhu Ling
doaj   +1 more source

Elimination of Necking and Aspect Ratio Dependence in Uniaxial Actuators by Continuous Fiber Reinforcement

Advanced Robotics Research, EarlyView.
A novel carbon fiber reinforcement for dielectric elastomer actuators enhances actuation force while decoupling electromechanical performance from the actuator's aspect ratio. Unlike conventional fiber reinforcements, it enables a uniform planar stretch state along the entire actuator.
Markus Koenigsdorff, Stefania Konstantinidi, Anett Endesfelder, Petr Osipov, Johannes Mersch, E.‐F. Markus Vorrath, Martina Zimmermann, Yves Perriard, Gerald Gerlach   +8 more
wiley   +1 more source

Learning Highly Dynamic Skills Transition for Quadruped Jumping Through Constrained Space

Advanced Robotics Research, EarlyView.
A quadruped robot masters dynamic jumps through constrained spaces with animal‐inspired moves and intelligent vision control. This hierarchical learning approach combines imitation of biological agility with real‐time trajectory planning. Although legged animals are capable of performing explosive motions while traversing confined spaces, replicating ...
Zeren Luo, Jiahui Zhang, Yimin Han, Ji Ma, Minghao Lu, Ioannis Havoutis, Peng Lu   +6 more
wiley   +1 more source

Multiobjective Codesign Optimization of a Planar Pneumatic Artificial Muscle‐Based Snake‐Like Robot for Enhanced Agility and Energy Efficiency

Advanced Robotics Research, EarlyView.
A codesign multiobjective optimization framework was developed to enhance the morphology and controller of a snake‐like robot driven by artificial muscles. It improved planar locomotion, agility, and power efficiency. The approach optimized link geometry and controller gains, revealing that shorter muscles near joints and longer linkages maximize ...
Ayla Valles, Mahdi Haghshenas‐Jaryani
wiley   +1 more source

The Angular Momentum of Stars Reflects the Relationship between Star-forming Environment and Galactic Evolution History

The Astrophysical Journal
This study focuses on stars with masses above the Kraft break in the Kepler field. Their rotational angular momenta are essentially the same as those at the zero-age main sequence.
Yu-Fu Shen, Yan Xu, Yi-Bo Wang, Xiu-Lin Huang, Xing-Xing Hu, Qi Yuan   +5 more
doaj   +1 more source

Beyond compactness

Astronomy & Astrophysics
Context. Ultra-compact massive galaxies (UCMGs) often exhibit elevated stellar-to-dynamical mass ratios when dynamical masses are estimated using standard virial prescriptions. This discrepancy has been interpreted as evidence for structural non-homology
Spiniello Chiara
doaj   +1 more source