Other
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987p%26ss...35.1021h&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 35, Aug. 1987, p. 1021-1027. SRC-supported research.
Other
2
Doppler Effect, Interplanetary Dust, Zodiacal Light, Absorption Spectra, Eccentricity, Light Scattering, Radial Flow, Radiation Pressure, Solar Radiation, Spectral Line Width
Scientific paper
Doppler shifts in zodiacal light are calculated for various eccentricities, dust sizes, and assumptions about radiation pressure. The purpose is to determine what effects in spectra might be observed which would enhance our understanding of the origin and lifetimes of interplanetary dust. The solar absorption line half-width in the scattered light is a much more difficult measurement to make, but it is a better indication of orbital eccentricity than the first moment of the line can ever be. While the first moment of the line (which is close to the displacement of the maximum of the line) is similar for both orbital eccentricity and radiation pressure and difficult to sort out from other effects like radial outflow, the line half-width tends to broaden most for elliptical orbits at all elongations especially in the Gegenschein (backward scattering angle) where all other effects (excepting radial outflow which reddens the line) cause no change in the original solar line.
Beard David B.
Hirschi D. C.
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