High-Resolution Spectra of Sodium in Mercury's Atmosphere

Details High-Resolution Spectra of Sodium in Mercury's Atmosphere High-Resolution Spectra of Sodium in Mercury's Atmosphere

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000dps....32.2406a&link_type=abstract

American Astronomical Society, DPS Meeting #32, #24.06; Bulletin of the American Astronomical Society, Vol. 32, p.1036

Astronomy and Astrophysics

Astronomy

Scientific paper

High-resolution (R ~100,000) spectral images of the sodium (Na) D1 and D2 lines in Mercury's atmosphere were obtained using a Fabry-Perot interferometer on the Dunn Solar Telescope at Sacramento Peak, NM. Observations were made from May 29 to June 4, 2000 when Mercury was at ~20.5 and 23.2 degrees E elongation with a radial velocity of ~-34.9 and -33.2 km/s, respectively. Preliminary analysis of the data suggests the atmosphere was optically thicker than when these emissions were first observed (Potter and Morgan 1985). This is attributed to the fact that those observations were made close to solar minimum, whereas our measurements were made closer to solar maximum. The observed D1 and D2 emission lines were blue shifted by ~0.74 and 0.71 Å, respectively, corresponding to Doppler shifts of ~-37.65 and -36.29 km/s.
Potter, A. E. and Morgan, T. H. 1985, Science 229, 651.

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