Results 1 to 10 of about 1,066,639 (291)
Element Abundances in Impulsive Solar Energetic-Particle Events
Universe, 2023 Impulsive solar energetic-particle (SEP) events were first distinguished as the streaming electrons that produce type III radio bursts as distinct from shock-induced type II bursts. They were then observed as the surprisingly enhanced 3He-rich SEP events,
Donald Reames
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Solar and stellar photospheric abundances
Living Reviews in Solar Physics, 2016 The determination of photospheric abundances in late-type stars from spectroscopic observations is a well-established field, built on solid theoretical foundations.
Carlos Allende Prieto
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PEPSI Investigation, Retrieval, and Atlas of Numerous Giant Atmospheres (PIRANGA). IV. High-resolution Phased-resolved Spectroscopy of the Ultra-hot-Jupiter KELT-20 b [PDF]
The Astronomical JournalWe present five datasets of high-resolution optical emission spectra of the ultra-hot-Jupiter KELT-20 b with the PEPSI spectrograph. Using a Bayesian retrieval framework, we constrain its dayside pressure–temperature profile and abundances of Fe, Ni, and
Victoria Bonidie +9 more
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Element Abundances of Solar Energetic Particles and the Photosphere, the Corona, and the Solar Wind
Atoms, 2019 From a turbulent history, the study of the abundances of elements in solar energetic particles (SEPs) has grown into an extensive field that probes the solar corona and physical processes of SEP acceleration and transport.
Donald Reames
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Solar data uncertainty impacts on MCMC methods for r-process nucleosynthesis
Frontiers in Physics, 2022 In recent work, we developed a Markov Chain Monte Carlo (MCMC) procedure to predict the ground state masses capable of forming the observed Solar r-process rare-earth abundance peak.
Nicole Vassh +4 more
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The Astrophysical Journal, 2023 The plasma composition of the solar corona is different from that of the solar photosphere. Elements that have a low first ionization potential (FIP) are preferentially transported to the corona and therefore show enhanced abundances in the corona ...
Teodora Mihailescu +8 more
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Understanding the Relationship between Solar Coronal Abundances and F10.7 cm Radio Emission
The Astrophysical Journal, 2023 Sun-as-a-star coronal plasma composition, derived from full-Sun spectra, and the F10.7 radio flux (2.8 GHz) have been shown to be highly correlated ( r = 0.88) during solar cycle 24.
Andy S. H. To +9 more
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The Astrophysical Journal Letters, 2023 We employ the differential evolution (DE) method to analyze observations from the Solar X-Ray Monitor on board the Chandrayaan-2 spacecraft. DE belongs to the family of evolutionary algorithms that find solutions using mechanisms inspired by biological ...
Anna Kępa +4 more
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Chemical Composition of RR Lyn – an Eclipsing Binary System with Am and λ Boo Type Components [PDF]
Journal of Astronomy and Space Sciences, 2017 High-resolution spectroscopic observations of the eclipsing binary system RR Lyn were made using the 1.8 m telescope at the Bohuynsan Optical Astronomical Observatory in Korea.
Yeuncheol Jeong +4 more
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Extended MCDHF Calculations of Energy Levels and Transition Data for N i
The Astrophysical Journal Supplement Series, 2023 Accurate and extensive atomic data are essential for spectroscopic analyses of stellar atmospheres and other astronomical objects. We present energy levels, lifetimes, and transition probabilities for neutral nitrogen, the sixth most abundant element in ...
M. C. Li +4 more
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