Results 61 to 70 of about 8,299 (260)

HESS upper limits on very high energy gamma-ray emission from the microquasar GRS 1915+105

, 2009
Context. High energy particles reside in the relativistic jets of microquasars, making them possible sources of very high energy radiation (VHE, >100 GeV). Detecting this emission would provide a new handle on jet physics. Aims.
H.E.S.S. Collaboration, Büsching, I., Raubenheimer, B.C., Venter, C., Holleran, M., Davids, I.D., De Jager, O.C., Acero, F.   +7 more
core   +1 more source

The BAT AGN Spectroscopic Survey. XVIII. Searching for supermassive black hole binaries in X-rays [PDF]

, 2020
Theory predicts that a supermassive black hole binary (SMBHB) could be observed as a luminous active galactic nucleus (AGN) that periodically varies on the order of its orbital timescale.
George, C Privon, Privon, George C., C, Megan Urry, Ricci, C., Urry, C. Megan, Powell, M., Urry, C., Mushotzky, Richard, Blecha, Laura, Mushotzky, R., Harrison, F., Kyuseok, Oh, Smith, K., Ichikawa, Kohei, Stern, D., Smith, Krista Lynne, Schawinski, K., Shimizu, T., Kakkad, Darshan, Koss, M., Oh, K., Stern, Daniel, Kakkad, D., Koss, Michael, Liu, Tingting, Powell, Meredith, Kohei, Ichikawa, Tingting, Liu, Laura, Blecha, Claudio, Ricci, Darshan, Kakkad, Trakhtenbrot, Benny, Urry, C. M., Ichikawa, K., Blecha, L., Ezequiel, Treister, Shimizu, T. T., Liu, T., Smith, K. L., Benny, Trakhtenbrot, Kevin, Schawinski, Treister, E., Richard, Mushotzky, Daniel, Stern, Treister, Ezequiel, Privon, G., Liu, T. T., Shimizu, T. Taro, T. Taro, Shimizu, Ricci, Claudio, Harrison, Fiona, Schawinski, Kevin, Oh, Kyuseok, Privon, G. C., Michael, Koss, Krista, Lynne Smith, Trakhtenbrot, B., Fiona, Harrison, Meredith, Powell   +58 more
core   +1 more source

Oxygen‐Tunnel Indium Tin Oxide Vertical Channel Transistors with Enhanced Current Density and Reliability for Monolithic 3D Compute‐In‐Memory Systems

Advanced Functional Materials, EarlyView.
Oxygen‐tunnel (OT) indium tin oxide (ITO) vertical channel transistors (VCTs) enable reliable, high‐density gain‐cell memory for monolithic 3D integration. A sandwiched SiN/SiO2/SiN OT stack selectively regulates oxygen transport, suppressing parasitic electrode oxidation while stabilizing channel oxygen vacancies, thereby suppressing carrier injection
Hyeonho Gu, Haksoon Jung, Yongwoo Lee, Hoichang Jeong, Yanfeng Zhao, Heesoo Yang, Minho Park, Hyeonjin Lee, Seunghun Baek, Minju Song, Junghwan Kim, Youngmin Jo, Hyunjin Park, Munhyeon Kim, Jae‐Joon Kim, Kyuho Jason Lee, Byungjo Kim, Jimin Kwon   +17 more
wiley   +1 more source

What can Simbol-X do for gamma-ray binaries?

, 2009
4 pages, 1 figure, Proceedings of the 2nd International Simbol-X symposium held in Paris, 2-5 December 2008Gamma-ray binaries have been uncovered as a new class of Galactic objects in the very high energy sky (> 100 GeV).
A. Szostek, Dubus, G., Henri, G., Cerutti, Benoit, B. Cerutti, Hill, Adam, B., Hill, A. B., Dubus, Guillaume, Henri, Gilles, G. Dubus, A. B. Hill, Phillippe Ferrando, Szostek, Anna, Jéro^me Rodriguez, G. Henri, Cerutti, B.   +15 more
core   +1 more source

Thermally Engineered Sodium‐Embedded Alumina with Programmable Synaptic Plasticity for Neuromorphic Transistors

Advanced Functional Materials, EarlyView.
A fully transparent, all‐metal‐oxide neuromorphic transistor using a sodium‐embedded alumina (SEA) electrolyte is demonstrated. By precisely tuning the thermal annealing process, the chemical composition of the SEA layer is controlled, allowing for the deterministic realization of both short‐term and long‐term synaptic plasticity within the same device
Yonghyun Albert Kwon, Jaeyeon Kim, Dong Yeon Won, Saeyoun Park, Youngjae Yoo, Seongchan Kim, Dong‐Hwan Kim, Jeong Ho Cho   +7 more
wiley   +1 more source

A study of X-ray binaries in the local universe

, 2013
In this thesis I present the research carried out on X-ray binaries in the Local Universe. These X-ray binaries are found in a wide variety of environments and display an array of interesting characteristics.
Joseph, Tana
core  

STATE TRANSITIONS IN BRIGHT GALACTIC X-RAY BINARIES: LUMINOSITIES SPAN BY TWO ORDERS OF MAGNITUDE

, 2009
Using X-ray monitoring observations with the All-Sky Monitor on board the Rossi X-Ray Timing Explorer and the Burst Alert Telescope on board the Swift, we are able to study the spectral state transitions occurred in about 20 bright persistent and ...
Yu, Wenfei, Yan, Zhen
core   +1 more source

Memristor‐Driven Active‐Matrix Organic Light‐Emitting Diode for Energy Efficient and High‐Resolution Displays

Advanced Functional Materials, EarlyView.
This study demonstrates that memristors can replace conventional 2T–1C driving circuits with simplified 1T–1 m architectures by exploiting resistance switching. With ultra‐low switching voltages (< ±0.2 V) and multi‐level resistance states, the memristors precisely control the current injected into organic light‐emitting diodes (OLEDs).
Dong Hyun Kim, Nahyun Kim, Seok Hee Hong, Ho Jin Lee, Jin Suk Oh, Jae Seong Park, Tae Geun Kim   +6 more
wiley   +1 more source

Millisecond Oscillations in X-Ray Binaries [PDF]

Annual Review of Astronomy and Astrophysics, 2000
▪ Abstract  The first millisecond X-ray variability phenomena from accreting compact objects have recently been discovered with the Rossi X-ray Timing Explorer. Three new phenomena are observed from low-mass X-ray binaries containing low-magnetic-field neutron stars: millisecond pulsations, burst oscillations, and kilohertz quasi-periodic oscillations.
openaire   +4 more sources

Multi-periodic variability in low mass x-ray binaries

, 1995
An introduction is given to the fields of low mass X-ray binaries (LMXBs), soft X-ray transients (SXTs) and related classes of objects. Aspects such as evolution, variability and populations are reviewed.The methods of time series analysis are listed and
Martin, Andrew, Martin, Andrew (Andrew Charles)   +1 more
core   +1 more source