On the Relation between OH and CH Radicals, Molecular/Neutral Hydrogen and Major 5780/5797 Diffuse Interstellar Bands

A precise relation between column densities of OH and CH molecule in the ISM has been found based on spectra of 24 stars (four of them new) and new published oscillator strengths of lines near 3078 Å and 30828 Å of OH molecule (0.001007 and 0.0006226, respectively). Observed column density ratio of OH and CH molecules in the ISM is equal to 3.20±0.17. A very good relation (with correlation coefficient equal to 0.85) between abundances of OH molecule and molecular hydrogen is also presented.

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Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024)