Results 11 to 20 of about 432,324 (217)
ACTIVITY-BRIGHTNESS CORRELATIONS FOR THE SUN AND SUN-LIKE STARS [PDF]
The Astrophysical Journal, 2011 We analyze the effect of solar features on the variability of the solar irradiance in three different spectral ranges. Our study is based on two solar-cycles' worth of full-disk photometric images from the San Fernando Observatory, obtained with red, blue and Ca II K-line filters.
Preminger, Dora +2 more
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THE ORIGIN OF ENHANCED ACTIVITY IN THE SUNS OF M67 [PDF]
The Astrophysical Journal, 2009 We report the results of the analysis of high resolution photospheric line spectra obtained with the UVES instrument on the VLT for a sample of 15 solar-type stars selected from a recent survey of the distribution of H and K chromospheric line strengths in the solar-age open cluster M67.
Reiners, Ansgar, Giampapa, Mark S.
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Active Latitude Oscillations Observed on the Sun [PDF]
Solar Physics, 2016 Accepted for publication by Solar ...
Kilcik, Ali +4 more
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Solar neutrinos as indicators of the Sun’s activity [PDF]
International Journal of Modern Physics A, 2019 Opportunity of the solar flares (SFs) prediction observing the solar neutrino fluxes is investigated. In three neutrino generations, the evolution of the neutrino flux traveling the coupled sunspots (CSs) which are the SF source is considered. It is assumed that the neutrinos possess both the dipole magnetic moment and the anapole moment while the ...
O. M. Boyarkin, I. O. Boyarkina
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Faculae Cancel out on the Surfaces of Active Suns
The Astrophysical Journal Letters, 2022 Abstract Surfaces of the Sun and other cool stars are filled with magnetic fields, which are either seen as dark compact spots or more diffuse bright structures like faculae. Both hamper detection and characterization of exoplanets, affecting stellar brightness and spectra, as well as transmission spectra.
Nèmec, N.-E. +15 more
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Space Science Reviews, 1981 A brief summary is given of observations which will be required to investigate further the structure and energy balance of active regions.
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CMEs and active regions on the sun [PDF]
Advances in Space Research, 2013 The relationship between active regions (ARs) and coronal mass ejections (CMEs) is studied. For this purpose a statistical analysis of 694 CMEs associated with ARs was carried out. We considered the relationship between properties of the CMEs and ARs characterized using the McIntosh classification.
Michałek, Grzegorz, Yashiro, Seiji
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The EUV spectrum of the Sun: Quiet- and active-Sun irradiances and chemical composition [PDF]
Astronomy & Astrophysics, 2019 We benchmark new atomic data against a selection of irradiances obtained from medium-resolution quiet-Sun spectra in the extreme ultraviolet (EUV), from 60 to 1040 Å. We used as a baseline the irradiances measured during solar minimum on 2008 April 14 by the prototype (PEVE) of the Solar Dynamics Observatory Extreme ultraviolet Variability Experiment ...
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Optimizing photoexcitation conditions for time‐resolved X‐ray solution scattering experiments
FEBS Open Bio, EarlyView.Time‐resolved X‐ray solution scattering (TR‐XSS) is a powerful technique to visualize how proteins change their structure in real time after light activation. Selecting the right laser photoexcitation conditions—fluence, excitation geometry, and sample refresh rate—is critical to maximize the experimental signal while avoiding unwanted side effects ...
Matteo Levantino
wiley +1 more source
BCG vaccination potentiates oxidative phosphorylation in neonatal myeloid‐derived suppressor cells
FEBS Open Bio, EarlyView.BCG vaccination enhances oxidative phosphorylation in neonatal MDSCs, impairing their immunosuppressive function. It upregulates electron transport chain genes and mitochondrial activity, increasing ATP and oxygen consumption. Pharmacological OXPHOS inhibition partially restores suppressive capacity, confirming causality.
Yingying Chen, Hui Li
wiley +1 more source