NASA NTRS · 19820035891
Discovery of interstellar rubidium
Abstract
Interstellar rubidium is detected through observations of the resonance line of Rb I at 7800 A towards zeta Oph. The abundance ratio of rubidium to potassium is estimated to be approximately solar, and if rubidium is generally found to have an abundance similar to potassium, it is indicated that the local interstellar medium is well mixed with a wide variety of the products of nucleosynthesis.
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Jura, M., Smith, W. H.. 1981-12-01. Discovery of interstellar rubidium. https://ntrs.nasa.gov/citations/19820035891
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