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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The absorption of infrared and visible radiation from stellar emissionspectra by the negatively charged hydrogen ions H$^{-}$ is considered. Wederive the explicit formulas for the bound-free absorption coefficient$a_{\nu}$ for the negatively charged hydrogen ion ${}^{\infty}$H$^{-}$ and itsisotopes ${}^{1}$H$^{-}$ (protium) and ${}^{2}$H$^{-}$ (deuterium or D$^{-}$).The bound-free absorption coefficient $a_{\nu}$ is used to evaluate the actualabsorption of infrared and visible radiation by the H$^{-}$ ion in photospheresof many cold stars with surface temperatures $T_s \le$ 8,250 $K$.

On the absorption of radiation by the negatively charged hydrogen ion. I. General theory and construction of the wave functions