Results 101 to 110 of about 112,298 (365)

Spectroscopic and photometric studies of white dwarfs in the Hyades [PDF]

, 2012
The Hyades cluster is known to harbour ten so-called classical white dwarf members. Numerous studies through the years have predicted that more than twice this amount of degenerate stars should be associated with the cluster.
Goldman, B., Jordan, S., Ludwig, H. -G., Röser, S., Schilbach, E., Tremblay, P. -E.   +5 more
core   +1 more source

Observation of 1/f 4 Noise in Organic Bilayer Ambipolar FETs and Proposition of Defect Engineering Method for Ultimate Noise Control

Advanced Electronic Materials, EarlyView.
The low‐frequency noise in organic bilayer ambipolar transistors is investigated, revealing a unique 1/f⁴ noise from correlated trapping/detrapping and generation/recombination processes. Inserting a thin parylene layer between the n/p junction effectively reduces this excess noise, suggesting a practical approach to enhanced device reliability in ...
Youngmin Han, Jaechan Song, Ryun‐Han Koo, Hocheon Yoo, Wonjun Shin   +4 more
wiley   +1 more source

Resistance Drift of Phase Change Materials Beyond the Power Law

Advanced Electronic Materials, EarlyView.
The timedependent resistance of phase change materials is important for their application as electronic memory. Here, resistance measurements of melt‐quenched germanium telluride from nanoseconds to minutes are presented. By going far beyond the usually considered measurement regime, deviations from the ubiquitous power law behavior are observed, that ...
Jakob Ballmaier, Sebastian Walfort, Martin Salinga   +2 more
wiley   +1 more source

Evolution of the Postmerger Remnants from the Coalescence of Oxygen–Neon and Carbon–Oxygen White Dwarf Pairs

The Astrophysical Journal Letters, 2023
Although multidimensional simulations have investigated the processes of double white dwarf (WD) mergers, postmerger evolution only focused on the carbon–oxygen (CO) or helium (He) WD merger remnants.
Chengyuan Wu, Heran Xiong, Jie Lin, Yunlang Guo, Xiaofeng Wang, Zhanwen Han, Bo Wang   +6 more
doaj   +1 more source

Exsolution process in white dwarf stars

Astronomy & Astrophysics
Context. White dwarf stars are considered to be suitable cosmic laboratories for studying the physics of dense plasma. Furthermore, the use of white dwarf stars as cosmic clocks to date stellar populations and main sequence companions demands an appropriate understanding of the physics of white dwarfs in order to provide precise ages for these stars ...
Camisassa, María Eugenia, Baiko, Denis A., Torres Gil, Santiago, Rebassa Mansergas, Alberto   +3 more
openaire   +4 more sources

Unique Na5−xSbSe Phase Enables High‐Rate Performance of Sb2Se3 Anodes in Na‐Ion Batteries

Advanced Energy Materials, EarlyView.
The (de)sodiation mechanism of Sb2Se3 is revealed through advanced operando techniques and ab initio simulations and underscores the value of complementary methods in exploring battery mechanisms. A new Na5−xSbSe phase is identified as the final sodiation product of Sb2Se3 anodes in Na‐ion batteries (NIBs), which enables the remarkably high‐rate ...
Amalie Skurtveit, Andrew Pastusic Jr., Anders Brennhagen, Faduma M. Maddar, Chris Erik Mohn, Abhoy Karmakar, Christopher A. O'Keefe, Ivana Hasa, Carmen Cavallo, Bjørnar Arstad, Helmer Fjellvåg, David S. Wragg, Alexey Y. Koposov   +12 more
wiley   +1 more source

Post-merger evolution of carbon-oxygen + helium white dwarf binaries and the origin of R Coronae Borealis and extreme helium stars [PDF]

, 2014
Orbital decay by gravitational-wave radiation will cause some close-binary white dwarfs (WDs) to merge within a Hubble time. The results from previous hydrodynamical WD-merger simulations have been used to guide calculations of the post-merger evolution ...
Xianfei Zhang, C. Jeffery, Xuefei Chen, Zhanwen Han   +3 more
semanticscholar   +1 more source

The mass ratio distribution of short period double degenerate stars [PDF]

, 2002
Short period double degenerates (DDs) are close white dwarf - white dwarf binary stars which are the result of the evolution of interacting binary stars.
Marsh, T. R., Maxted, P. F. L., Moran, C. K. J.   +2 more
core   +2 more sources

Management of Cardiovascular Health Issues in Turner Syndrome: Expert Insights and Expanded Recommendations From the 2024 Guideline Development Team

American Journal of Medical Genetics Part C: Seminars in Medical Genetics, EarlyView.
ABSTRACT Turner syndrome (TS) is frequently complicated by congenital heart disease (CHD). While left‐sided lesions such as bicuspid aortic valve (BAV) and coarctation of the aorta are the most common structural heart lesions in TS, other anomalies, such as aortic arch malformations, hypoplastic left heart syndrome (HLHS), persistent left superior vena
Katya de Groote, Sheetal R. Patel, Kristian Havmand Mortensen, Isabel Witvrouwen, Anthonie Duijnhouwer, Nicole M. Brown, Jasmine Grewal, Kathryn C. Chatfield, Aaron T. Dorfman, Siddharth K. Prakash   +9 more
wiley   +1 more source

Asteroseismology of One of the Most Rapidly Rotating DBV Stars: EPIC 248705247

The Astrophysical Journal
We present a comprehensive analysis of oscillations of the helium-rich white dwarf DBV star EPIC 248705247 (SDSS J102106.69+082724.8). We extract the light curves from 79.7 days of K2 Campaign 14 data and identify 21 independent frequencies, including ...
Jiayi Zhang, Jianning Fu, Tianqi Cang, Jie Su, Yanhui Chen, Xiaoyu Ma, Gang Meng   +6 more
doaj   +1 more source