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Upper Limit for Lithium in Mercury's Atmosphere

Authors
Journal
Icarus
0019-1035
Publisher
Elsevier
Publication Date
Volume
123
Issue
2
Identifiers
DOI: 10.1006/icar.1996.0163

Abstract

Abstract High-resolution spectra of Mercury show no evidence of emission at the wavelength of the lithium resonance doublet, 6708 Å. Observations were made with the 1.5-m telescope at the Catalina Observatory, near Tucson, Arizona, with the LPL échelle spectrograph and cooled CCD camera system. With an rms noise level of ∼0.1% we set an upper limit for the Li vertical column abundance <8.4 × 10 7atoms cm −2, and the Li/Na ratio is <5.6 × 10 −4.

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