Results 41 to 50 of about 6,042 (298)

Electromagnetic Simulations of Solar Radio Emissions [PDF]

Journal of Geophysical Research: Space Physics, 2019
AbstractSolar radio emissions are electromagnetic waves emitted in the solar wind as a consequence of electron beams accelerated during solar flares or interplanetary shocks such as interplanetary coronal mass ejections. Different physical mechanisms have been suggested to describe their origin. A good understanding of the emission process would enable
Henri, Pierre, Sgattoni, A., Briand, C., Amiranoff, François, Riconda, C.   +4 more
openaire   +2 more sources

X‐Functionality–Driven Photocatalytic Hydrogen Evolution in 2D 4‐X‐PEA2SnI4 Perovskites

Advanced Functional Materials, EarlyView.
We report a water‐based synthesis of 2D 4‐X‐PEA2SnI4 perovskite microcrystals with prominent photocatalytic (PC) activity for H2 production. The synergy between organic functionalization and HI‐derived iodide scavenges holes suppress octahedral distortion, and favor electron accumulation, enabling a PC H2 evolution ∼20 µmol·g−1 and long‐term stability ...
Taeyeon Kim, Gayoung Seo, Seong Yeon Park, Juwon Jang, Yunho Ahn, Samiksha Mukesh Jain, Samrat Das Adhikari, Harumi Correa‐Leiva, Ignacio Utreras‐Asenjo, Oscar A. Douglas‐Gallardo, Carina Pareja‐Rivera, Kayoung Cho, Byeongsung Kim, Jhonatan Rodriguez‐Pereira, Eunseo Choi, JaeHong Park, Jin Ho Bang, Danilo H. Jara‐Quinteros, Sixto Giménez, Seog Joon Yoon, Andrés F. Gualdrón‐Reyes, Iván Mora‐Seró   +21 more
wiley   +1 more source

Constraining Solar Emission Radius at 42 MHz During the 2024 Total Solar Eclipse Using a Student-commissioned Radio Telescope

The Astrophysical Journal
Low-frequency solar radio emission is sourced in the solar corona, with sub-100 MHz radio emission largely originating from the ∼10 ^5 K plasma around 2 optical radii.
Olivia R. Young, Timothy E. Dolch, Joseph F. Helmboldt, Christopher Mentrek, Louis P. Dartez, Michael T. Lam, Sophia V. Sosa Fiscella, Evan Bretl, Colin Joyce, Johannes Loock, Grace Meyer, Annabel Peltzer, Joseph Petullo, Parker Reed, Emerson Sigtryggsson, Benjamin Bassett, Andrew B. Hawken, Alejandro Z. Heredia, Paige Lettow, Whit Lewis, Mikayla Manna, Nicholas Mirochnikoff, Michael Zemcov   +22 more
doaj   +1 more source

A new approach to the maser emission in the solar corona

, 2015
Aims. The electron plasma frequency ωpe and electron gyrofrequency Ωe are two parameters that allow us to describe the properties of a plasma and to constrain the physical phenomena at play, for instance, whether a maser instability develops.
Regnier, Stephane, S. Régnier
core   +1 more source

Directional features of the downshifted peak observed in HF-induced stimulated electromagnetic emission spectra obtained using an interferometer [PDF]

, 2006
International audienceA high frequency (HF) ionospheric modification experiment was carried out between 25 September and 8 October 2004, using the EISCAT HF transmitter located near Tromsø, Norway.
Khudukon, B. Z., Rietveld, Michael T., Yurik, R.Yu, Brekke, A., M. Grill, A. Brekke, Tereshchenko, E., Khudukon, B., Rietveld, M., M. T. Rietveld, B. Isham, Belyey, Vasyl, Khudukon, B.Z., Tereshchenko, E.D., R. Yu. Yurik, T. Hagfors, Belyey, V., Isham, B., Hagfors, T., B. Z. Khudukon, Brekke, Asgeir, Rietveld, M. T., V. Belyey, Grill, M., Yurik, R. Yu., Yurik, R., Tereshchenko, E. D., E. D. Tereshchenko   +27 more
core   +1 more source

Cyclic Olefin Copolymers as Versatile Materials for Advanced Engineering Applications

Advanced Functional Materials, EarlyView.
Cyclic olefin copolymers (COCs) are presented as highly versatile materials combining tunable synthesis, excellent optical properties, and mechanical robustness. Their potential spans microfluidics, bioengineering, and advanced electronics, while emerging self‐healing and sustainable solutions highlight future opportunities.
Giulia Fredi, Norma Mallegni, Andrea Dorigato, Mario Milazzo   +3 more
wiley   +1 more source

Auto Recognition of Solar Radio Bursts Using the C-DCGAN Method

Frontiers in Physics, 2021
Solar radio bursts can be used to study the properties of solar activities and the underlying coronal conditions on the basis of the present understanding of their emission mechanisms. With the construction of observational instruments, around the world,
Weidan Zhang, Fabao Yan, Fabao Yan, Fuyun Han, Ruopu He, Enze Li, Zhao Wu, Yao Chen   +7 more
doaj   +1 more source

Signature of Saturn's auroral cusp: Simultaneous Hubble Space Telescope FUV observations and upstream solar wind monitoring [PDF]

, 2005
peer reviewedModel simulations by Bunce et al. (2005a) have shown that direct precipitation of electrons in Saturn's dayside cusp regions is not capable of producing significant FUV aurora.
Cowley, Stanley W.H., Badman, Sarah V, Cowley, Stanley W. H., Bunce, Emma J., Grodent, Denis, Bunce, Emma J, Gérard, Jean-Claude, Clarke, John T., Clarke, John T, Badman, Sarah V.   +9 more
core   +1 more source

Solar observations with single-dish INAF radio telescopes: Continuum imaging in the 18 – 26 GHz range [PDF]

, 2022
This is the final version. Available from Springer via the DOI in this record. This research used version 3.1.3 (The SunPy Community et al., 2020) of the SunPy open-source software package (Mumford et al., 2020).We present a new solar radio imaging ...
Pili, M, Mulas, S, Loru, S, Pisanu, T, Schirru, L, Egron, E, Messerotti, M, Murtas, G, Serra, G, Pellizzoni, A, Righini, S, Orfei, A, Iacolina, MN, Zanichelli, A, Buffa, F, Maccaferri, A, Guglielmino, SL, Marongiu, P, Marongiu, M, Bachetti, M, Zucca, P, Concu, R, Valente, G, Navarrini, A, Tiburzi, C, Ladu, A, Ortu, P, Melis, A, Saba, A, Pupillo, G, Deiana, GL   +30 more
core   +1 more source

Homogenous FACsPbI3 Perovskite Solar Cells Enabled by a Seed‐Facilitated Cation Exchange Strategy

Advanced Functional Materials, EarlyView.
A novel seed‐facilitated cation exchange strategy is designed for homogenous FACsPbI3 perovskites using the biomass‐derived solvent γ‐valerolactone. Pre‐deposited 0D Cs4PbI6 seeds induce rapid nucleation and efficient cation exchange, producing a uniform FA–Cs distribution and significantly reducing defect density, enabling high‐performance and stable ...
Meng Ren, Guodong Chen, Haifei Wang, Bowei Li, Yuetian Chen, Jiahao Guo, Yingping Fan, Shaowei Wang, Yanfeng Miao, Feng Gao, Yixin Zhao   +10 more
wiley   +1 more source