Results 41 to 50 of about 72,949 (314)

Research progress in coronal magnetic field measurements

地球与行星物理论评, 2022
Different solar atmospheric layers are connected by the magnetic field of the Sun, which is the primary source for various types of solar activity. The magnetic activity of the Sun has a significant impact on the solar-terrestrial environment and human ...
Zihao Yang, Hui Tian, Wenxian Li, Jiale Zhang, Xianyong Bai, Yuhang Gao, Yajie Chen   +6 more
doaj   +1 more source

Case study of the mesospheric and lower thermospheric effects of solar x-ray flares: Coupled ion-neutral modelling and comparison with EISCAT and riometer measurements [PDF]

, 2008
Two case studies of upper mesospheric and lower thermospheric (UMLT) high-latitude effects of solar X-ray flares are presented. Sodankylä Ion-neutral Chemistry Model (SIC) electron density profiles agree with D-region EISCAT and riometer ...
Beharrell, M.J., A. Seppälä, Verronen, P.T., Seppälä, A., Ulich, T., C.-F. Enell, Enell, C.-F., Honary, F., P. T. Verronen, J. P. Vierinen, T. Ulich, A. Kero, E. Turunen, M. J. Beharrell, Vierinen, J.P., Turunen, E., F. Honary, Kero, A.   +17 more
core   +1 more source

Solar Flare Ribbon Fronts. I. Constraining Flare Energy Deposition with IRIS Spectroscopy

The Astrophysical Journal, 2023
Spectral lines formed at lower atmospheric layers show peculiar profiles at the “leading edge” of ribbons during solar flares. In particular, increased absorption of the BBSO/GST He i λ 10830 line, as well as broad and centrally reversed profiles in the ...
Vanessa Polito, Graham S. Kerr, Yan Xu, Viacheslav M. Sadykov, Juraj Lorincik   +4 more
doaj   +1 more source

Rapid variations of Si IV spectra in a flare observed by interface region imaging spectrograph at a sub-second cadence

Frontiers in Astronomy and Space Sciences, 2022
We report on observations of highly-varying Si IV 1402.77 Å line profiles observed with the Interface Region Imaging Spectrograph (IRIS) during the M-class flare from 18 January 2022 at an unprecedented 0.8 s cadence.
Juraj Lörinčík, Juraj Lörinčík, Vanessa Polito, Vanessa Polito, Vanessa Polito, Bart De Pontieu, Bart De Pontieu, Bart De Pontieu, Sijie Yu, Nabil Freij, Nabil Freij   +10 more
doaj   +1 more source

Numerical Simulations of Magnetoacoustic–Gravity Waves in the Solar Atmosphere [PDF]

, 2012
We investigate the excitation of magnetoacoustic–gravity waves generated from localized pulses in the gas pressure as well as in the vertical component of velocity.
R. Oliver, Murawski, Kris, Oliver, Ramón, J. A. McLaughlin, K. Murawski, Srivastava, Abhishek, McLaughlin, James, A. K. Srivastava   +7 more
core   +1 more source

Multi-wavelength observations and modeling of a microflare: constraining non-thermal particle acceleration

Frontiers in Astronomy and Space Sciences, 2023
In this work we analyze a small B-class flare that occurred on 29 April 2021 and was observed simultaneously by the Interface Region Imaging Spectrograph (IRIS) and the Nuclear Spectroscopic Telescope Array (NuSTAR) X-ray instrument.
Vanessa Polito, Vanessa Polito, Marianne Peterson, Lindsay Glesener, Paola Testa, Sijie Yu, Katharine K. Reeves, Xudong Sun, Jessie Duncan   +8 more
doaj   +1 more source

Evolution of the thermodynamic properties of a coronal mass ejection in the inner Corona

Frontiers in Astronomy and Space Sciences, 2023
The thermodynamic evolution of Coronal Mass Ejections (CMEs) in the inner corona (≤1.5 Rsun) is not yet completely understood. In this work, we study the evolution of thermodynamic properties of a CME core observed in the inner corona on 20 July 2017, by
Jyoti Sheoran, Vaibhav Pant, Ritesh Patel, Ritesh Patel, Dipankar Banerjee, Dipankar Banerjee, Dipankar Banerjee   +6 more
doaj   +1 more source

Orbit design for future SpaceChip swarm missions in a planetary atmosphere [PDF]

, 2012
The effect of solar radiation pressure and atmospheric drag on the orbital dynamics of satellites-on-a-chip (SpaceChips) is exploited to design equatorial long-lived orbits about the oblate Earth.
Colombo, Camilla, McInnes, Colin
core   +1 more source

Heating and dynamics of the Solar atmosphere

CoRR, 2023
The solar atmosphere shows anomalous variation in temperature, starting from the 5500 K photosphere to the million-degree Kelvin corona. The corona itself expands into the interstellar medium as the free streaming solar wind, which modulates and impacts the near-Earth space weather.
openaire   +2 more sources

Composites of Shellac and Silver Nanowires as Flexible, Biobased, and Corrosion‐Resistant Transparent Conductive Electrodes

Advanced Functional Materials, EarlyView.
Shellac, a centuries‐old natural resin, is reimagined as a green material for flexible electronics. When combined with silver nanowires, shellac films deliver transparency, conductivity, and stability against humidity. These results position shellac as a sustainable alternative to synthetic polymers for transparent conductors in next‐generation ...
Rahaf Nafez Hussein, Tiago Carneiro Gomes, Eliza Ng, Simon Rondeau‐Gagné, Tricia Breen Carmichael   +4 more
wiley   +1 more source