English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A collection of the best solar and laboratory spectra in the soft X-rays isused here to perform a preliminary benchmark in this wavelength region, bycomparing observed vs. predicted wavelengths and calibrated solar irradiances.The benchmark focuses on the Fe IX - Fe XIV ions,for which we have recentlycalculated the relevant atomic data, however a few other ions have also beenbenchmarked. The iron ions are dominating the soft X-rays, however a largefraction of the strongest soft X-ray lines due to n=4 -> n=3 transitions werepreviously unidentified. The strongest transitions are all identified here, inparticular the decays from the core-excited levels (3s 3p^l 4s, l=$ 5,4,3,2,1for Fe X, Fe XI, Fe XII, Fe XIII, and Fe XIV respectively) which are thestrongest soft X-ray transitions from these ions. Many new identifications areproposed, some only tentatively. Good agreement in terms of solar irradiancesbetween the soft X-ray and EUV (n=3 -> n=3) transitions is found, confirmingthe reliability of the new large-scale calculations. Some of the new atomicdata and identifications are particularly important for the Solar DynamicObservatory (SDO) Atmospheric Imaging Assembly (AIA) 94 A band.

Benchmarking atomic data for astrophysics: a first look at the soft X-ray lines