Results 131 to 140 of about 843,058 (298)
The Astrophysical JournalInterband lags in the optical continua of active galactic nuclei (AGNs) have been observed over years of monitoring, yet their physical origins remain unclear.
Zhen-Bo Su +4 more
doaj +1 more source
Advanced Science, EarlyView.Terahertz resonances in crystalline heterostructures could close a spectral gap between conventional electronics and photonics while opening new windows on non‐equilibrium lattice dynamics. Femtosecond optical screening of the depolarization field in epitaxial PbTiO3/SrTiO3 superlattices launches a collective polar mode that oscillates near 1 THz and ...
Deepankar Sri Gyan +13 more
wiley +1 more source
First Results from the PanRadio Gamma-Ray Burst Collaboration: The 400-day Afterglow of GRB 230815A
The Astrophysical Journal LettersWe introduce the PanRadio Gamma-ray Burst (GRB) program carried out on the Australia Telescope Compact Array: a systematic, multiyear, radio survey of all southern Swift GRB events, comprehensively following the multifrequency evolution of their ...
James K. Leung +28 more
doaj +1 more source
Ground-based very high energy gamma ray astronomy: Observational highlights [PDF]
It is now more than 20 years since the first ground based gamma ray experiments involving atmospheric Cerenkov radiation were undertaken. The present highlights in observational ground-based very high energy (VHE) gamma ray astronomy and the optimism ...
Turver, K. E.
core +1 more source
Advanced Science, EarlyView.Hyperfine coupling to 29Si$^{29}{\rm Si}$ and 73Ge$^{73}{\rm Ge}$ nuclear spins limits hole spin‐qubit coherence in Ge heterostructures. We demonstrate device‐grade, nuclear‐spin‐free 70Ge$^{70}{\rm Ge}$/28Si70Ge$^{28}{\rm Si}^{70}{\rm Ge}$ quantum wells grown on industrial SiGe buffers with minimal use of enriched precursors.
Patrick Daoust +11 more
wiley +1 more source
Ag Nanowire‐Integrated MoS2/ZnO Heterojunctions for Highly Efficient Photogenerated Charge Transfer
Advanced Electronic Materials, Volume 11, Issue 6, May 2025.A versatile strategy is reported for fabricating multi‐dimensional heterojunctions with significantly improved charge transfer capability. By integrating Ag nanowires with a MoS2/ZnO heterojunction, a fourfold increase in surface photovoltage is achieved, reaching 200 mV under visible light illumination.
Anh Thi Nguyen +8 more
wiley +1 more source
Low‐Power Control Of Resistance Switching Transitions in First‐Order Memristors
Advanced Electronic Materials, EarlyView.Joule losses are a serious concern in modern integrated circuit design. In this regard, minimizing the energy necessary for programming memristors should be handled with care. This manuscript presents an optimal control framework, allowing to derive energy‐efficient programming voltage protocols for resistance switching devices. Following this approach,
Valeriy A. Slipko +3 more
wiley +1 more source
Stellar X-Ray Variability and Planetary Evolution in the DS Tucanae System
The Astrophysical JournalWe present an analysis of four Chandra observations of the 45 Myr old DS Tuc binary system. We observed X-ray variability of both stars on timescales from hours to months, including two strong X-ray flares from star A.
George W. King +7 more
doaj +1 more source
Time-Domain Astronomy with the Fermi Gamma-Ray Burst Monitor [PDF]
No abstract ...
Hui, C. Michelle
core +1 more source
Astro-COLIBRI: Empowering Citizen Scientists in Time Domain Astronomy
Proceedings Journ\'ees 2024 de la Soci\'et\'e d'Astronomie & d'Astrophysique (SF2A), Atelier: "Gemini - Collaborations Pro-Amateurs"
Schüssler, Fabian +3 more
openaire +2 more sources