Results 81 to 90 of about 3,131 (230)

Diverse Landscape of Tunable Magnetic, Topological, and Ferroelectric States in 2D Ti3Se3Te2

Advanced Science, EarlyView.
Ti3Se3Te2 emerges as a multifunctional 2D van der Waals platform. The monolayer is a dynamically stable ferromagnetic quantum anomalous Hall insulator. In bilayers, two stacking configurations yield distinct phases: AA‐stacking hosts an altermagnetic quantum spin Hall insulator, while AA′‐stacking exhibits three‐state in‐plane ferroelectricity ...
Jiangtao Yu, Jingbo Bai, Yali Yang, Shifeng Qian, Xiaotian Wang, Zhuhong Liu   +5 more
wiley   +1 more source

A MegaCam Survey of Outer Halo Satellites. VI: The Spatially Resolved Star Formation History of the Carina Dwarf Spheroidal Galaxy [PDF]

, 2016
We present the spatially resolved star formation history (SFH) of the Carina dwarf spheroidal galaxy, obtained from deep, wide-field g,r imaging and a metallicity distribution from the literature.
Côté, Patrick, de Boer, T. J. L., Djorgovski, S. G., Geha, Marla, Guzmán, Andrés E., Muñoz, Ricardo R., Santana, Felipe A., Simon, Joshua D., Stetson, Peter   +8 more
core   +3 more sources

Comprehensive Analysis of NGC 6134: Structure, Dynamics, and Blue Straggler Star Candidates

The Astrophysical Journal Supplement Series
Open clusters play a critical role in the study of both stellar and Galactic evolution. We present a comprehensive analysis of the open cluster NGC 6134 using Gaia DR3 astrometric and photometric data, supplemented with multiwavelength observations from ...
Dexin Zeng, Ying Mei, Huanbin Chi, Hui Deng, Feng Wang   +4 more
doaj   +1 more source

Spectroscopy of Blue Stragglers and Turnoff Stars in M67 (NGC 2682)

, 2000
We have analyzed high-resolution spectra of relatively cool blue stragglers and main sequence turnoff stars in the old open cluster M67 (NGC 2682).
Ahumada J., Andrievsky S. M., Anupama G. C., Belloni T., Chevalier C., Edvardsson B., Eric L. Sandquist, Faraggiana R., Goranskij V. P., Gratton R. G., Harlow J. J. B., Mathys G., Matthew D. Shetrone, Murray C. A., Murray C. A., Perryman M. A. C., Sanders W. L., Sanders W. L., Sarna M. J., Talon S., van den Berg M., Varenne O., Zhao J. L.   +22 more
core   +1 more source

Wireless, Adaptable and Fully Implantable Battery‐powered Devices for Optical Stimulation of the Spinal Cord in Small Rodents

Advanced Science, EarlyView.
Current technologies for spinal cord optogenetic stimulation rely on external power sources and face reliability constraints in freely behaving animals. Here, a fully implantable, battery‐powered optoelectronic device is introduced, enabling operation in any selected environment with wireless recharging for months‐long stimulation.
Shahriar Shalileh, Adan Moallemi, Elham Mohseni Vadeghani, Samuel Tretjakov, Brianna Tsuyuki, Alexander Golab, Benjamin Rever, Wolfram Tetzlaff, Dena Shahriari   +8 more
wiley   +1 more source

WIYN Open Cluster Study. XC. Radial-velocity Measurements and Spectroscopic Binary Orbits in the Open Cluster NGC 2506

The Astronomical Journal
NGC 2506 is a rich, intermediate-age (2.0 Gyr), metal-poor ([Fe/H] ∼ −0.2) open cluster. This work presents the results of 12,157 spectroscopic radial-velocity measurements of 2442 stars in the NGC 2506 field obtained over 41 yr, made as part of the WIYN
Evan Linck, Robert D. Mathieu, David W. Latham   +2 more
doaj   +1 more source

Dynamical Processes in Globular Clusters

, 2014
Globular clusters are among the most congested stellar systems in the Universe. Internal dynamical evolution drives them toward states of high central density, while simultaneously concentrating the most massive stars and binary systems in their cores ...
A. Ahmad, A. C. Fabian, A. D’Ercole, A. D’Ercole, A. Karakas, A. P. Milone, A. Renzini, A. Tanikawa, A. Whitehead, B. Gao, B. Moore, C. Einsel, D. Bacon, D. C. Heggie, D. C. Heggie, D. C. Heggie, D. C. Heggie, D. F. Chernoff, D. Lynden-Bell, D. Lynden-Bell, E. Bettwieser, E. Carretta, E. Gaburov, E. Gaburov, E. Vesperini, E. Vesperini, E. Vesperini, F. I. Pelupessy, F. I. Pelupessy, G. A. Drukier, G. D. Quinlan, G. Kupi, G. Piotto, G. Piotto, H. Baumgardt, H. Baumgardt, H. C. Plummer, H. Cohn, H. Cohn, H. Cohn, I. R. King, J. Barnes, J. Binney, J. C. Lombardi, J. E. Grindlay, J. G. Hills, J. G. Hills, J. Goodman, J. Goodman, J. M. Fregeau, J. M. Fregeau, J. M. Fregeau, J. Makino, J. Makino, J. Makino, J. R. Hurley, J. R. Hurley, J. R. Hurley, J. S. Stodolkiewicz, J. S. Stodolkiewicz, K. Bekki, K. J. Joshi, K. Nitadori, K. Nitadori, K. Takahashi, K. Takahashi, K. Takahashi, K. Takahashi, L. J. Spitzer, L. Spitzer, L. Spitzer, M. A. Gürkan, M. Freitag, M. Freitag, M. Freitag, M. Fujii, M. Giersz, M. Giersz, M. Giersz, M. Giersz, M. Giersz, M. Giersz, M. Giersz, M. Giersz, M. Hénon, N. Prantzos, P. Hut, P. Hut, P. Hut, P. Kroupa, P. L. Cottrell, P. P. Eggleton, R. Capuzzo-Dolcetta, R. G. Belleman, R. Spurzem, S. Deiters, S. E. Mink de, S. F. Portegies Zwart, S. F. Portegies Zwart, S. F. Portegies Zwart, S. F. Portegies Zwart, S. F. Portegies Zwart, S. F. Portegies Zwart, S. F. Portegies Zwart, S. Inagaki, S. J. Aarseth, S. L. W. McMillan, S. L. W. McMillan, S. L. W. McMillan, S. Portegies Zwart, T. Decressin, T. Decressin, T. Ebisuzaki, T. Fukushige, T. Fukushige, V. A. Antonov, W. Benz, W. Dehnen   +117 more
core   +1 more source

Engineering Neuronal Network Connectivity Through Precise and Scalable Electrical Modulation

Advanced Science, EarlyView.
This study presents a scalable all‐electrical method for precise neuronal‐circuit reconfiguration based on high‐density microelectrode arrays. By employing biologically inspired plasticity rules, targeted connectivity changes were successfully induced and quantified across diverse neuronal preparations.
Sreedhar S. Kumar, Yannaël Bossard, Rachel Sava, Tobias Gänswein, Lorenca Sadiraj, Jean‐Samuel Dupré, Manuel Schröter, J. Gray Camp, Fernando Cardes, Julian Bartram, Andreas Hierlemann   +10 more
wiley   +1 more source

Searching for Variability in the Blue Straggler Star Region of the Globular Cluster NGC 6397

The Astronomical Journal
We studied stellar variability in the subgiant branch and blue straggler stars region of the globular cluster NGC 6397. The aim of this research is to identify and characterize new short-period, low-amplitude variable stars.
T. Cisternas-Araya, C. C. Cortés, S. Villanova, J. A. Ahumada, M. C. Parisi   +4 more
doaj   +1 more source

Mergers of close primordial binaries

, 2005
We study the production of main sequence mergers of tidally-synchronized primordial short-period binaries. The principal ingredients of our calculation are the angular momentum loss rates inferred from the spindown of open cluster stars and the ...
Ahumada J., D. M. Terndrup, de Kool M., de la Fuente Marcos R., Duquennoy A., Kaluzny J., Kaluzny J., Keppens R., Lapasset E., M. H. Pinsonneault, McCrea W. H., Mermilliod J. C., N. Andronov, Rucinski S. M., Spite F., Stepien K., Vant Veer F., Vilhu O., Zahn J.-P.   +18 more
core   +1 more source