Resonance scattering from optically thin expanding cometary atmospheres

Details Resonance scattering from optically thin expanding cometary atmospheres Resonance scattering from optically thin expanding cometary atmospheres

May 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....40..373m&link_type=abstract

Astronomy and Astrophysics, vol. 40, no. 4, May 1975, p. 373-380.

Astronomy and Astrophysics

Astrophysics

3

Atmospheric Scattering, Emission Spectra, Kohoutek Comet, Light Scattering, Resonance Scattering, Astronomical Models, Hydrogen Atoms, Lyman Alpha Radiation, Optical Thickness, Radial Flow, Skylab 4, Sunlight

Scientific paper

Emission-line profiles are computed for optically thin expanding cometary atmospheres, assuming resonance scattering of sunlight as the excitation mechanism. Application is made to atomic hydrogen, both ignoring and allowing for the effect of radiation pressure. Lyman-alpha line profiles are computed for Comet Kohoutek both to illustrate the theory and to assess the degree of geocoronal absorption of images taken by Skylab-4. The effect of a varying solar flux on brightness (the Greenstein Effect) is investigated for atomic oxygen.

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