Results 31 to 40 of about 1,126,700 (167)

Scientific problems addressed by the Spektr-UV space project (world space Observatory—Ultraviolet) [PDF]

, 2016
The article presents a review of scientific problems and methods of ultraviolet astronomy, focusing on perspective scientific problems (directions) whose solution requires UV space observatories.
Ayres, T., Kanev, E. N., Sachkov, M. E.,, Ayres, T.,, Sachkov, M. E., L. Fossati, Sichevskii, S. G., Piskunov, Nikolai,, Fossati, L.,, Bisikalo, D. V.,, Wiebe, D. Z., Shchekinov, Yu. A.,, Werner, K.,, Mashonkina, L. I.,, Yu. A. Shchekinov, J.-C. Gérard, Fossati, Luca, A. A. Boyarchuk, Kanev, E. N.,, A. G. Zhilkin, Boyarchuk, A. A., Kil'pio, E. Yu.,, Strassmeier, K. G., Ustamuich, S.,, Kaigorodov, P. V.,, Bisikalo, D. V., Zwintz, S. K., T. Ayres, Lamzin, S. A., Sichevskii, S. G.,, P. V. Kaigorodov, Voshchinnikov, N. V.,, K. G. Strassmeier, Lamzin, S. A.,, M. E. Sachkov, A. I. Gomez de Castro, Chugai, N. N.,, Jeffrey, S., Ustamuich, S., S. Ustamuich, P. B. Ivanov, Hubert, B.,, B. Hubert, Mashonkina, L. I., Zwintz, S. K.,, D. Z. Wiebe, Zhilkin, A. G., S. A. Lamzin, Savanov, I. S., N. V. Voshchinnikov, Gomez de Castro, A. I.,, L. I. Mashonkina, I. S. Savanov, S. G. Sichevskii, Kil'pio, E. Yu., K. Werner, Shustov, B. M.,, Ryabchikova, T. A.,, Chugai, N. N., Wiebe, D. Z.,, D. Shulyak, D. V. Bisikalo, S. K. Zwintz, T. A. Ryabchikova, Boyarchuk, A. A.,, Ryabchikova, Tanya, Gomez de Castro, Ana I., Shematovich, V. I.,, Ivanov, P. B.,, N. Piskunov, Gerard, J. -C, Shulyak, D., Hubert, B., Lammer, H.,, E. N. Kanev, Savanov, I. S.,, Strassmeier, K. G.,, Piskunov, Nikolai E., B. M. Shustov, V. I. Shematovich, H. Lammer, Shustov, B. M., Lammer, H., Shematovich, V. I., Zhilkin, A. G.,, Ivanov, P. B., E. Yu. Kil’pio, S. Jeffrey, Voshchinnikov, N. V., Kaigorodov, P. V., Shulyak, D.,, Gerard, J.-C., N. N. Chugai, Werner, Katharina, Shchekinov, Yu. A., Jeffrey, S.,   +95 more
core   +1 more source

The Extreme-ultraviolet Precursors and Postcursors of Solar Flares

The Astrophysical Journal
EUV brightenings are small-scale magnetic reconnection events that consistently appear before and after solar flares. However, it is not well understood how EUV precursors might foreshadow flares and what the physical connection is between the EUV ...
Larisza D. Krista
doaj   +1 more source

Improving High‐Temperature Operational Stability of Inverted Perovskite Solar Cells Through MXene Heat‐Dissipating Layers

Advanced Science, EarlyView.
MeO‐2PACz‐functionalized MXene nanosheets create a thermally conductive buried interface in inverted perovskite solar cells. The interface improves heat spreading, suppresses defects and ion migration, and strengthens charge extraction, extending T80 at 65°C from 141 to 687 h while maintaining competitive efficiency.
Masoud Karimipour, Nil Monrós Oliveras, Zhenchuan Tian, Timm Swoboda, Francesco Salutari, Marianna Sledzinska, Maria Chiara Spadaro, Kenedy Tabah Tanko, Javier Rodríguez‐Viejo, Jordi Arbiol, Tiankai Zhang, Feng Gao, Monica Lira‐Cantu   +12 more
wiley   +1 more source

Nonthermal phase transitions in semiconductors induced by a femtosecond extreme ultraviolet laser pulse [PDF]

, 2013
Part of Focus on High Energy Density Physics. In this paper, we present a novel theoretical approach, which allows the study of nonequilibrium dynamics of both electrons and atoms/ions within free-electron laser excited semiconductors at femtosecond time
Jeschke, H. O., Ziaja, Beata, Jeschke, Harald O., Medvedev, Nikita   +3 more
core   +1 more source

Detecting Solar Flare Precursors Using DEFT

The Astrophysical Journal
The Detection and EUV Flare Tracking (DEFT) tool automatically identifies flare precursors in extreme ultraviolet (EUV) observations in a fast and consistent manner, with minimal computational overhead. DEFT currently uses GOES/SUVI 304 Å observations to
Larisza D. Krista
doaj   +1 more source

Direct SMBH Formation Driven by Runaway Stellar Collisions in Globally Unstable Stellar Systems

Astronomische Nachrichten, EarlyView.
ABSTRACT The fueling problem addresses the ultimate fate of the reservoirs of gas and stars driven into the deepest gravitational potential wells of galaxies, thus it may contain the Universe's densest concentrations of gas and stars. This raises a key question: does the infalling material collapse directly into a supermassive black hole, or can it ...
Marcelo C. Vergara, Andrés Escala
wiley   +1 more source

Optical performance of LPP multilayer collector mirrors

, 2022
Paper 832217The usable power and the collector optics lifetime of high-power extreme ultraviolet light sources at 13.5 nm are considered as the major challenges in the transitioning of EUV lithography from the current pre-production phase to high volume ...
Perske, Marco, Pauer, Hagen, Yulin, Sergiy, Hoffmann, Kay, Cummings, Kevin D., Trost, Marcus, Ershov, Alex, Tünnermann, Andreas, Fiedler, Tobias, Kaiser, Norbert, Feigl, Torsten, Schroeder, Sven, Böwering, Norbert, Duparré, Angela, La Fontaine, Bruno   +14 more
core   +1 more source

Simulations of Coronal Mass Ejections on a Young Solar-type Star and Their Detectability Through Coronal Spectral Observations

The Astrophysical Journal
There is a growing interest in searching for coronal mass ejections (CMEs) in other stellar systems, because they are thought to be one of the important factors shaping planetary atmospheres.
Yu Xu, Hui Tian, Julián D. Alvarado-Gómez, Jeremy J. Drake, Gustavo Guerrero   +4 more
doaj   +1 more source

Neutrino Oscillation in a Minimal Length Spacetime

Astronomische Nachrichten, EarlyView.
ABSTRACT We investigate how neutrino oscillations are modified in a non‐commutative spacetime characterized by a minimal length scale, described by the Quesne–Tkachuk algebra. By incorporating the algebra's deformation parameter β$$ \beta $$ into the effective neutrino mass, we derive the two‐flavor oscillation probability in this non‐commutative ...
Luísa Nadal‐Camargo, Thiago Oliveira Ferreira, Dimiter Hadjimichef, César A. Z. Vasconcellos   +3 more
wiley   +1 more source

Validation of an Extreme-ultraviolet Desaturation Technique for the Atmospheric Imaging Assembly on Board the Solar Dynamics Observatory Using Observations from the Extreme Ultraviolet Imager on Board Solar Orbiter

The Astrophysical Journal Letters
High-dynamic-range imaging in the extreme-ultraviolet regime is frequently compromised by detector saturation and charge blooming during intense solar flares, preventing reliable photometry of flare cores.
Sabrina Guastavino, David Berghmans, Cis Verbeeck, Stefan J. Hofmeister, Emil Kraaikamp, Ewan C. M. Dickson, Federico Benvenuto, Paolo Massa, Anna Maria Massone, Michele Piana   +9 more
doaj   +1 more source