Results 81 to 90 of about 155,544 (195)
The Astrophysical Journal Supplement SeriesAccurate estimation of the solar vacuum ultraviolet irradiance between 0.1 and 200 nm is critical for the study of planetary aeronomy. Previous empirical models have relied on a limited number of reference spectra, or on multiple data sets with various ...
Zhen Xu, Jianqi Qin
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Propagating and Stationary Bright Knots in the Quiet Solar Corona
The Astrophysical JournalSmall-sized localized brightenings are an important candidate for resolving the problem of the solar atmospheric heating. They are spread over the whole solar disk and are suggested to be caused by magnetic reconnection or wave dissipation.
Shaoxuan Tong, Jun Zhang
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Emission of Extreme Ultraviolet Line Radiation from Solar Centers of Activity.
The Astronomical Journal, 1963 Correlation of extreme ultraviolet radiation spectral line emission intensity with active regions on solar disk based on corona electron temperature and ...
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The Astrophysical JournalHigh-resolution EUV spectroscopy provides an informative diagnostic tool for the early evolution of coronal mass ejections (CMEs) since it can directly measure many physical properties of CME plasma close to the Sun that cannot be determined from white ...
E. M. Wraback +3 more
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Extreme-ultraviolet Polarimetric Diagnostics of the Solar Corona: The Hanle Effect of Ne viii 770 Å
The Astrophysical JournalMagnetic fields are the primary driver of the plasma thermodynamics in the upper solar atmosphere, especially in the corona. However, magnetic field measurements in the solar corona are sporadic, thereby limiting us from the complete understanding of ...
Raveena Khan +3 more
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Time-dependent Hinode/EIS Atlas of a Coronal Mass Ejection Containing Cool Material
The Astrophysical JournalWe report the first time-dependent spectral atlas of a coronal mass ejection (CME) observed by the Hinode/Extreme Ultraviolet Imaging Spectrometer (EIS).
E. M. Wraback +2 more
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Evolution of Flare Ribbon Bead-like Structures in a Solar Flare
The Astrophysical Journal LettersWe present fast-cadence and high-resolution observations of flare ribbons from the Solar Orbiter Extreme Ultraviolet Imager (EUI). Utilizing the short-exposure observations from the EUI High Resolution Imager in the extreme-ultraviolet, we find small ...
Ryan J. French +8 more
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Extreme-ultraviolet Synthesis of Nanojet-like Ejections due to Coalescing Flux Ropes
The Astrophysical Journal LettersDetection and characterization of small-scale energetic events such as nanoflares and nanojets remain challenging owing to their short lifetimes, small spatial extent, and relatively low energy release, despite their potential role in coronal heating ...
Samrat Sen +5 more
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Emission lines in the solar ultraviolet spectrum.
The Astronomical Journal, 1955 F. S. Johnson +3 more
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Morphological Study of Quiescent Streamers during Solar Minimum by Ultraviolet Emission Lines
The Astrophysical Journal, 2007 We perform, by utilizing spectroscopic measurements made with SOHO/UVCS, a morphological characterization of the quiescent streamer during solar minimum, by means of both a comprehensive survey of daily synoptic observations over 33 weeks from 1996 April to November and detailed analysis of several specialized observations targeting quiescent streamers.
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