Io's sodium emission profiles - Variations due to Io's phase and magnetic latitude

Details Io's sodium emission profiles - Variations due to Io's phase and magnetic latitude Io's sodium emission profiles - Variations due to Io's phase and magnetic latitude

Aug 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...215..971t&link_type=abstract

Astrophysical Journal, Part 1, vol. 215, Aug. 1, 1977, p. 971-976.

Astronomy and Astrophysics

Astrophysics

10

Cloud Cover, D Lines, Io, Planetary Radiation, Sodium, Magnetic Equator, Magnetic Variations, Planetary Atmospheres

Scientific paper

We present recent measurements of high-resolution sodium D2 emission line profiles of Io's atmosphere and cloud. The high-velocity skirts of these profiles are strongest when Io is on the magnetic equator where protons and heavy ions, which sputter atoms from Io's surface, are concentrated. The skirts are most prominent on the long-wavelength side of the line when Io is west of Jupiter, and they are most prominent on the short-wavelength side of the line when Io is east of Jupiter. Our observations also indicate that there is a shift in the emission peak with respect to Io which is correlated with Io's orbital phase angle.

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