Results 61 to 70 of about 959 (264)

Anchoring Stellar Age Indicators: A Cross Calibration of [C/N] and Gyrochronology Ages via the Age–Velocity Dispersion Relation

The Astronomical Journal
Determining stellar ages is challenging, as it depends on other stellar parameters in a nonlinear way and often relies on stellar evolution models to infer the underlying relation between these parameters and age. This complexity increases when comparing
Yuxi(Lucy) Lu, Marc H. Pinsonneault, Yuan-Sen Ting, Phil R. Van-Lane, John D. Roberts, Jamie Tayar, Alexander Stone-Martinez, Amanda L. Ash   +7 more
doaj   +1 more source

Unveiling the 3D structure of the central molecular zone from stellar kinematics and photometry: The 50 and 20 km/s clouds

Astronomy & Astrophysics
Context. The central molecular zone (CMZ), surrounding the Galactic centre, is the largest reservoir of dense molecular gas in the Galaxy. Despite its relative proximity, the 3D structure of the CMZ remains poorly constrained, primarily due to projection
Nogueras-Lara Francisco, Barnes Ashley T., Henshaw Jonathan D., Fiteni Karl, Sofue Yoshiaki, Schödel Rainer, Martínez-Arranz Álvaro, Sormani Mattia C., Armijos-Abendaño Jairo, Colzi Laura, Jiménez-Serra Izaskun, Rivilla Víctor M., García Pablo, Ginsburg Adam, Hu Yue, Klessen Ralf S., Diederik Kruijssen J. M., Tolls Volker, Lazarian Alex, Lipman Dani R., Longmore Steven N., Lu Xing, Martín Sergio, Riquelme-Vásquez Denise, Pineda Jaime E., Sánchez-Monge Álvaro, Vasini Arianna, Mills Elisabeth A. C.   +27 more
doaj   +1 more source

Confirmation of an Anomalously Low Dark Matter Content for the Galaxy NGC 1052-DF4 from Deep, High-resolution Continuum Spectroscopy

The Astrophysical Journal, 2023
NGC 1052-DF4 was found to be the second “galaxy lacking dark matter” in the NGC 1052 group, based on its velocity dispersion of ${\sigma }_{\mathrm{gc}}={4.2}_{-2.2}^{+4.4}$ km s ^−1 as measured from the radial velocities of seven of its globular ...
Zili Shen, Pieter van Dokkum, Shany Danieli   +2 more
doaj   +1 more source

Tough, Ductile, and Strong Hard‐Soft Cementitious Composite Enabled by Multi‐Material Additive Manufacturing

Advanced Materials, EarlyView.
Drawing inspiration from the layered hard‐soft architecture found in sea sponges, this work establishes a new framework for architected cementitious composites (ACC) through multi‐material additive manufacturing (MMAM) process. The integration of mortar and elastomer phases into layered architectures enables synergistic toughening mechanisms, including
Aimane Najmeddine, Shashank Gupta, William Makinen, Zayvinn Lin, Krystal Delnoce, Reza Moini   +5 more
wiley   +1 more source

The Stellar Kinematics In the Main Meridional Section of the Galaxy [PDF]

Symposium - International Astronomical Union, 1993
In the framework of the programme of studying the meridional section of the Galaxy (MEGA) the catalogue of stellar data (about 26500 stars) had been compiled and investigated. The main part of the catalogue consist of the proper motions of stars with respect to the galaxies.
openaire   +1 more source

3D full-spectrum fitting: Algorithm comparison

Astronomy & Astrophysics
Context. Full-spectrum fitting is the prevailing method for extracting stellar kinematic and population measurements from 1D galaxy spectra. 3D methods refer to an analysis of integral field spectroscopy (IFS) data, where the spatial and spectral ...
Jethwa Prashin, Hubmer Simon, Ramlau Ronny, Van de Ven Glenn   +3 more
doaj   +1 more source

Weaving Intelligence: Thermally Drawn Multimaterial Fibers Toward AI‐Enabled Smart Textiles

Advanced Materials, EarlyView.
Thermally drawn multimaterial fibers are rapidly advancing as intelligent structural units for next‐generation smart textiles. Integrating multimaterial architectures with neuromorphic and spiking‐neural‐network principles enables fabrics that can sense, compute, and adapt autonomously.
Vuong Dinh Trung, Jiaxiang Yi, Hieu Nguyen‐Duc, Tien Nu Hoang Lo, Weili Zhao, Chaoqun Dong, Fabien Sorin, Baris Caglar, Lei Wei, Tung Nguyen‐Dang   +9 more
wiley   +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

All‐Polyimide‐Mediated Liquid Metal Assembly on Aerogels for Breathable and Robust Electronic Skins

Advanced Materials, EarlyView.
An all‐polyimide‐mediated assembly strategy resolves the fundamental conflict between physiological breathability and electromechanical robustness in wearable electronics. By integrating a polyamic acid‐encapsulated liquid metal ink onto an ultralight polyimide aerogel, imidization‐induced contraction enables low‐temperature conductive activation and ...
Haijun Zhu, Jiancheng Dong, Hao Qiu, Je Hyeong Kim, Xingyu Liu, Shiyin Lin, Mengting Zheng, Chang Zhou, Yuduo Zhang, Jiayu Hou, Kangjia Geng, Yuchen Wang, Yidong Peng, Haoran Liu, Guanzheng Wu, Yunpeng Huang, Yongsheng Luo, Steve Park, Tianxi Liu   +18 more
wiley   +1 more source

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