Results 61 to 70 of about 49,810 (294)

Nova AQL 1918: A Nude Old Nova [PDF]

International Astronomical Union Colloquium, 1981
AbstractIUE observations at high and low resolution of Nova Aql 1918 show neither evidence of outflow nor the presence of nebular lines. This indicates that the shell ejected at the time of the outburst and surrounding the system for many years (Mustel and Boyarchuck, 1970) has by now disappeared.The high excitation spectrum presents rapid variations ...
P.L. Selvelli, A. Cassatella
openaire   +1 more source

Polymer Interface Enables Reversible Quasi‐Solid Sulfur Conversion in Sodium‐Sulfur Batteries

Advanced Functional Materials, EarlyView.
The polymer interface enables a stable quasi‐solid sulfur conversion pathway in room‐temperature Na─S batteries. The coating regulates Na+ transport, stabilizes the cathode–electrolyte interphase, and accommodates mechanical stress, suppressing electrolyte decomposition and sulfur migration, thereby improving reaction uniformity, reducing polarization,
Reza Andaveh, Ying Zhao, Enzhong Jin, Zixin Zhang, Vinicius Martins, Parham Pirayesh, Yi Gan, Yi Yuan, Yijia Wang, Frederick Benjamin Holness, Changhong Cao, Jun Song, Yang Zhao   +12 more
wiley   +1 more source

Helium-deficient ER UMa-type Dwarf Nova below the Period Minimum with a Hot Secondary

The Astrophysical Journal
We present the discovery of a peculiar dwarf nova KSP-OT-201712a using high-cadence, multicolor observations made with the Korea Microlensing Telescope Network.
Youngdae Lee, Dae-Sik Moon, Sang Chul Kim, Hong Soo Park, Yuan Qi Ni   +4 more
doaj   +1 more source

Submillimeter-wave emission of three Galactic red novae: cool molecular outflows produced by stellar mergers

, 2018
Red novae are optical transients erupting at luminosities typically higher than those of classical novae. Their outbursts are believed to be caused by stellar mergers.
Kaminski, T., Menten, K. M., Patel, N. A., Steffen, W., Tylenda, R., Young, K. H.   +5 more
core   +1 more source

Recurrent novae [PDF]

International Astronomical Union Colloquium, 1990
AbstractThermonuclear models of recurrent novae demand white dwarf accretors near the Chandrasekhar mass. In this case, the known recurrent novae should possess classical counterparts bearing the same structural parameters and space distribution, save for having only marginally less massive white dwarfs.
openaire   +1 more source

When does an old nova become a dwarf nova? Kinematics and age of the nova shell of the dwarf nova AT Cancri [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
8 pages, 8 ...
Shara, Michael M., Drissen, Laurent, Martin, Thomas, Alarie, Alexandre, Stephenson, F. Richard   +4 more
openaire   +3 more sources

Solution‐Processed Two‐Dimensional Indium Oxide on Sodium‐Embedded Alumina for Reconfigurable Optoelectronic Synaptic Transistors

Advanced Functional Materials, EarlyView.
Wafer‐scale two‐dimensioanl In2Se3 oxidized into InOx on sodium‐embedded beta‐alumina enables multifunctional reconfigurable electronics. Sodium ions accumulate within distinct spatial distribution under drain‐controlle and gate‐controlled operation. Drain‐control operation gives controllability of ultraviolet‐driven optoelectronic synaptic conductance
Jinhong Min, Yonghyun Albert Kwon, Hyunbin Kim, Jihyun Kim, Myeongjin Jung, Jaewon Heo, Gwang Ya Kim, Vlastimil Mazanek, Zdeněk Sofer, In Soo Kim, Jeong Ho Cho, Hyesung Park, Sang Min Won, Joohoon Kang   +13 more
wiley   +1 more source

The Contribution of a Community Event to Expert Work: An Activity Theoretical Perspective

Outlines, 2004
Becoming an expert in any knowledge domain takes time and a great deal of learning, both theoretical and experiential.  The individual’s knowledge is often supplemented through knowledge exchanges with other experts.
Alanah Kazlauskas, Kathryn Crawford
doaj  

3D‐Printed Piezoionic/Bioelectronic Hydrogel for Electro‐Metabolic Regulation of Osteogenic Differentiation

Advanced Healthcare Materials, EarlyView.
A 3D‐printed piezoionic GPMx hydrogel enables stable electromechanical signal generation under mechanical loading, exhibiting long‐term durability and low fatigue. As a bioactive patch, it restores endogenous bioelectricity to stimulate osteogenesis via Ca2+ influx and mitochondrial activation, while simultaneously enabling label‐free alkaline ...
Sayan Deb Dutta, Myoung Joon Jeon, Youjin Seol, Ki‐Taek Lim   +3 more
wiley   +1 more source

Evolution of cataclysmic variables under different magnetic braking prescriptions

Astronomy & Astrophysics
Context. The evolution of cataclysmic variables (CVs) – interacting binaries where a low-mass donor transfers matter to a white dwarf via an accretion disk – is critically controlled by magnetic braking (MB).
Zhou Bingyao, Zhu Chunhua, Lü Guoliang, Guo Sufen, Liu Helei, Khamrakulov Farkhodjon   +5 more
doaj   +1 more source