On the detection of rubidium in diffuse interstellar clouds

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Absorption Spectra, Abundance, Astronomical Spectroscopy, Interstellar Gas, Rubidium, B Stars, O Stars, Photoionization, Supergiant Stars

Scientific paper

A search for absorption from neutral rubidium at 7800 A was conducted. No evidence for absorption to a 3 sigma limit of less than 1.5 mA was seen in the diffuse interstellar gas toward the stars omicron Persei, zeta Persei, and zeta Ophiuchi. Present results do not confirm the detection by Jura and Smith (1981) toward zeta Oph. A possible reason for the discrepancy is presented. In light of the present measurements, the abundance of interstellar rubidium in reconsidered.

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