Results 31 to 40 of about 155,544 (195)
One-Minute Quasi-Periodic Pulsations during an M-Class Solar Flare
Universe, 2022 We study the Quasi-Periodic Pulsations (QPPs) of an M4.4 class solar flare, which occurred in active region NOAA 11165 on 8 March 2011. With the Fast Fourier Transform (FFT) method, we decompose the flare light curve into fast- and slowly-varying ...
Fanpeng Shi, Dong Li, Zongjun Ning
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A First Comparison of Millimeter Continuum and Mg ii Ultraviolet Line Emission from the Solar Chromosphere [PDF]
, 2017 We present joint observations of the Sun by the Atacama Large Millimeter/submillimeter Array (ALMA) and the Interface Region Imaging Spectrograph (IRIS). Both millimeter/submillimeter-λ continuum emission and ultraviolet (UV) line emission originate from
T. Bastian +6 more
semanticscholar +1 more source
ABRUPT LONGITUDINAL MAGNETIC FIELD CHANGES AND ULTRAVIOLET EMISSIONS ACCOMPANYING SOLAR FLARES [PDF]
The Astrophysical Journal, 2012 We have used Transition Region and Coronal Explorer (TRACE) 1600 images and Global Oscillation Network Group (GONG) magnetograms to compare ultraviolet (UV) emissions from the chromosphere to longitudinal magnetic field changes in the photosphere during four X-class solar flares.
Johnstone, B. M. +2 more
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Observations and modeling of the ultraviolet emission of solar flares [PDF]
Proceedings of the International Astronomical Union, 2015 AbstractIn this paper we present the method of using far UV spectra of the flare observed by Interface Region Imaging Spectrograph (IRIS) for determination of the contribution of the continuum emission to the total UV radiation observed e.g. by SDO in 1600 Å channel.
Katarzyna Mikuła +2 more
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Solar-blind ultraviolet-C persistent luminescence phosphors
Nature Communications, 2020 Visible-light and infrared-light persistent phosphors are extensively studied and are being used as self-sustained glowing tags in darkness. In contrast, persistent phosphors for higher-energy, solar-blind ultraviolet-C wavelengths (200–280 nm) are ...
Xianli Wang +3 more
semanticscholar +1 more source
Emirates Mars Ultraviolet Spectrometer's (EMUS) Observation of Argon in the Martian Thermosphere
Geophysical Research Letters, 2022 The Emirates Mars Ultraviolet Spectrometer (EMUS) is a far ultraviolet spectrometer on‐board the Emirates Mars Mission's (EMM) which arrived at Mars on 9 February 2021.
Fatma Hussain Lootah +11 more
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Emission lines of H2 in the extreme-ultraviolet solar spectrum
The Astrophysical Journal, 1978 A sunspot EUV spectrum covering the wavelength range from 1175 to 1714 A with high spatial and spectral resolution is examined which contains about 200 lines not previously reported in solar spectra. Many of the lines are identified as transitions in the Lyman bands of H2.
Jordan, C +4 more
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Ultraviolet emission lines of Si ii in cool star and solar spectra [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 Recent atomic physics calculations for Si II are employed within the Cloudy modelling code to analyse Hubble Space Telescope (HST) STIS ultraviolet spectra of three cool stars, Beta-Geminorum, Alpha-Centauri A and B, as well as previously published HST/GHRS observations of Alpha-Tau, plus solar quiet Sun data from the High Resolution Telescope and ...
Laha, Sibasish +8 more
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Extreme ultraviolet emission lines of Ni XII in laboratory and solar spectra [PDF]
Monthly Notices of the Royal Astronomical Society, 2000 Wavelengths for emission lines arising from 3s23p5-3s3p6 and 3s23p5-3s23p43d transitions in Ni XII have been measured in extreme ultraviolet spectra of the Joint European Torus(JET) tokamak. The 3s23p5 2P1/2-3s23p4(3P)3d 2D3/2 line is found to lie at 152.90 ± 0.02 A, a significant improvement over the previous experimental determination of 152.95 ± 0.5
Keenan, Francis +4 more
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A Model for Gradual-phase Heating Driven by MHD Turbulence in Solar Flares
The Astrophysical Journal, 2023 Coronal flare emission is commonly observed to decay on timescales longer than those predicted by impulsively driven, one-dimensional flare loop models.
William Ashfield IV, Dana Longcope
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