Results 21 to 30 of about 2,343,483 (316)

Latitudinal Distribution of Sunspot and North-South Asymmetry Revisited [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2018
The solar magnetic field plays a central role in the field of solar research, both theoretically and practically. Sunspots are an important observational constraint since they are considered a discernable tracer of emerged magnetic flux tubes, providing ...
Heon-Young Chang
doaj   +1 more source

A NEW METHOD FOR NORTH-SOUTH ASYMMETRY OF SUN SPOT AREA ANALYSIS [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2007
We have studied the temporal variation in the North-South asymmetry of the sunspot area during the period from 1874 to 2007. Though the 9-year periodicity is commonly reported, shorter periodicities is still under study.
Heon-Young Chang
doaj   +1 more source

An Updated Line List for Spectroscopic Investigation of G Stars- I: Redetermination of the Abundances in the Solar Photosphere

open access: yesPhysics and Astronomy Reports, 2023
We propose a line list that may be useful for the abundance analysis of G-type stars in the wavelength range 4080 – 6780 Å. It is expected that the line list will be useful for surveys/libraries with overlapping spectral regions (e.g.
Timur Şahin   +3 more
doaj   +1 more source

A new species of the genus Leeonychiurus Sun & Arbea, 2014 (Collembola Onychiurinae, Onychiurini) from China, with a checklist of Chinese Onychiurini

open access: yes, 2020
Zhang, Shaoqing, Sun, Xin, Wu, Donghui (2020): A new species of the genus Leeonychiurus Sun & Arbea, 2014 (Collembola Onychiurinae, Onychiurini) from China, with a checklist of Chinese Onychiurini. Zootaxa 4743 (1): 137-143, DOI: https://doi.org/10.11646/
Wu, Donghui, Sun, Xin, Zhang, Shaoqing
core   +1 more source

Very high energy proton peak flux model

open access: yesJournal of Space Weather and Space Climate, 2020
Solar energetic particles (SEPs) pose a serious radiation hazard to spacecraft and astronauts. The highest energy SEPs are a significant threat even in heavily shielded applications.
Raukunen Osku   +9 more
doaj   +1 more source

The quiet sun at mm wavelengths as seen by ALMA

open access: yesFrontiers in Astronomy and Space Sciences, 2022
Solar observations at sub-mm, mm and cm wavelengths offer a straightforward diagnostic of physical conditions in the solar atmosphere because they yield measurement of brightness temperature which, for optically thick features, equals intrinsic ...
Costas E. Alissandrakis   +2 more
doaj   +1 more source

Exploring New Horizons for Wine Grapes: Modulating Functional Effects by Varying Harvest Timing and Solar Exposure

open access: yesFoods
Grenache (GN) and Cabernet Sauvignon (CS) are two traditional red grape varieties widely cultivated in the Mediterranean area and both late-ripening cultivars, which makes them less sensitive to global warming conditions and more stable to harvest timing.
Daniel Rico   +7 more
doaj   +1 more source

Coronal seismology by slow waves in non-adiabatic conditions

open access: yesFrontiers in Astronomy and Space Sciences, 2022
Slow magnetoacoustic waves represent an important tool for probing the solar coronal plasma. The majority of seismological methods with slow waves are based on a weakly non-adiabatic approach, which assumes the coronal energy transport has only weak ...
Dmitrii Y. Kolotkov
doaj   +1 more source

Vancouver Sun Seven Days [PDF]

open access: yes, 2001
Promotional listing from The Vancouver Sun.

core  

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