Results 51 to 60 of about 3,019,248 (252)

On the nature of soft Gamma-ray repeaters

, 2001
Soft gamma-ray repeaters (SGRs) and Anomalous X-ray pulsars (AXPs) are generally accepted to be magnetars. Recently, Zhang, Xu & Qiao (2000, ApJ, 545, L127) proposed an alternative viewpoint about the nature of the SGRs (and AXPs). In this picture, SGR bursts are attributed to the impacts of some comet-like objects with the central bare strange ...
openaire   +2 more sources

Soft Gamma-ray Repeaters in clusters of massive stars [PDF]

AIP Conference Proceedings, 2000
Infrared observations of the environment of the two Soft Gamma-ray Repeaters (SGRs) with the best known locations on the sky show that they are associated with clusters of massive stars. Observations with ISO revealed that SGR 1806−20 is in a cluster of giant massive stars, still enshrouded in a dense cloud of gas and dust [1].
openaire   +1 more source

Soft and Transient Bioelectronics Enabled by Polymer‐Free Ti3C2Tx MXene Hydrogels

Advanced Materials, EarlyView.
We present Ti3C2Tx MXene hydrogel (MXgel) bioelectronics, a soft, flexible, and fully transient platform for high‐fidelity neural recording and stimulation. MXgel bioelectronics exhibit exceptional electrical conductivities, low electrochemical impedances, and high charge injection capacities.
Raghav Garg, Franco A. Laimo, Stefano Ippolito, Prastuti Upadhyay, Spencer R. Averbeck, Dimitris Boufidis, Charles‐Antoine Assenmacher, Dayo O. Adewole, Sai Panigrahy, Bita Soltan Mohammadlou, Lucy Plant, Yuan Zhang, Andrew G. Richardson, Yury Gogotsi, D. Kacy Cullen, Flavia Vitale   +15 more
wiley   +1 more source

Eclipsed X-Ray Bursts from Magnetar SGR J1935+2154 and the Fireball Measurements

The Astrophysical Journal
In theory, burst activity of the magnetar can lead to the formation of fireballs trapped by the magnetic field and corotating with the star. However, smoking-gun observational evidence of the fireball is elusive.
Sheng-Lun Xie, Aming Chen, Yun-Wei Yu, Shao-Lin Xiong, Hua Feng, Shuang-Nan Zhang, Zi-Gao Dai, Wang-Chen Xue, Ming-Yu Ge, Xiao-Bo Li, Liang-Duan Liu, Jia-Cong Liu, Wen-Jun Tan, Chen-Wei Wang, Shu-Xu Yi, Peng Zhang, Yan-Qiu Zhang, Zhen Zhang, Chao Zheng, Xiao-Ping Zheng   +19 more
doaj   +1 more source

On the radio quiescence of anomalous x-ray pulsars and soft gamma-ray repeaters

, 2001
In the hot environments of the anomalous X-ray pulsars (AXPs) and the soft gamma-ray repeaters (SGRs), as indicated by their luminous, pulsed, quiescent X-ray emission, gamma rays generated from the inner gaps may have shorter attenuation lengths via two-
Zhang, Bing
core   +1 more source

Thickness‐Defined Transport Regime Toward Near‐Ideal Area‐Type Switching

Advanced Materials, EarlyView.
By thinning the oxide layer, memristors pass from diode‐like and battery‐effect‐dominated behavior toward eventual short‐circuit failure. Within the intermediate 5–6 nm window, they reach a near‐ideal analog area‐type switching regime, featuring symmetric hysteresis, area‐dependent conductance, and continuous linear programming of HRS and LRS with ...
Cuo Wu, Junjie Zhao, Richard Schroedter, Jason Vincent, Hampus Hoffman, Leif Riemenschneider, Abdallh Herbawe, Hao Shen, Ronald Tetzlaff, Stefan Slesazeck, Gianaurelio Cuniberti, Thomas Mikolajick, Benjamin Max   +12 more
wiley   +1 more source

Fermi GBM Observations of the Galactic Magnetar SGR 1935+2154 during Its 2022 January Activity

The Astrophysical Journal
The X-ray and radio burst-emitting soft gamma-ray repeater SGR 1935+2154 has been the most active magnetar during the past decade, with at least one active episode each year since 2019.
Noor ul Sabah Rehan, Alaa I. Ibrahim
doaj   +1 more source

Millifluidic Synthesis of Core–Shell Resonators For Tunable Sonic BandGaps in Acoustic Metamaterials

Advanced Materials Interfaces, EarlyView.
Millimeter‐scale core–shell acoustic resonators are fabricated by a gravity‐assisted dripping approach and incorporated into epoxy composites at controlled volume fractions. The resulting alumina–core resonator composites show tunable low‐frequency acoustic attenuation, demonstrating a scalable route for integrating locally resonant metamaterial units ...
Colton Steiner, Xiaohui Shen, Bianka Pajo, Chin‐Teh Sun, Jeffrey P. Youngblood, Carlos Martinez   +5 more
wiley   +1 more source

Physics of magnetospheric emission in soft gamma-ray repeaters

The Astrophysical Journal, 1995
Soft gamma-ray repeaters appear to be relatively young, strongly magnetized neutron stars embedded within plerions. The observationally inferred presence of teragauss fields and energetic outflows in these sources provides some support for a model in which the bursts results from crustal disturbances that load and energize the magnetosphere with the ...
Fulvio Melia, Marco Fatuzzo
openaire   +1 more source

Reducing Interfacial Separation Force in High‐Speed Constrained‐Surface Projection Stereolithography Using a Dual‐Modulus Silicone Release Film

Advanced Materials Interfaces, EarlyView.
A dual‐modulus silicone release film creates distributed stress concentrations at high‐/low‐modulus boundaries, triggering multi‐site crack initiation and rapid interfacial detachment. The architecture lowers the peak separation force by 97.6%, shortens detachment time, and enables stable continuous projection stereolithography at 720 mm h−1, offering ...
Xiaogang Li, Xiaoqing Kang, Hong Xiao, Yugang Duan   +3 more
wiley   +1 more source