Pioneer 10 observations of zodiacal light brightness near the ecliptic: Changes with heliocentric distance
Sky maps made by the Pioneer 10 Imaging Photopolarimeter (IPP) at sun-spacecraft distances from 1 to 3 AU have been analyzed to derive the brightness of the zodiacal light near the ecliptic at elongations greater than 90 degrees.The change in zodiacal light brightness with heliocentric distance is compared with models of the spatial distribution of the dust. Use of background starlight brightnesses derived from IPP measurements beyond the asteroid belt, where the zodiacal light is not detected, and, especially, use of a corrected calibration lead to considerably lower values for zodiacal light than those reported by us previously.
KeywordsHeliocentric Distance Ecliptic Plane Brightness Variation Asteroid Belt Dust Density
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- Hanner, M. S. and C. Leinert, 1972, The Zodiacal Light as seen from the Pioneer F/G and Helios Probes, Space Research XII, 445–455.Google Scholar
- Hanner, M. S. and J. L. Weinberg, 1973, Gegenschein Observations from Pioneer 10, Sky and Telescope, 45, 217–218.Google Scholar
- Hanner, M. S. and J. L. Weinberg, 1974, Changes in Zodiacal Light with Heliocentric Distance: Preliminary Results from Pioneer 10, Space Research XIV, 769–771.Google Scholar
- Hanner, M. S., J. L. Weinberg, L. M. DeShields II, B. A. Green, and G. N. Toller, 1974, Zodiacal Light and the Asteroid Belt: The View from Pioneer 10, J. Geophys. Res. 79, 3671–3675.Google Scholar
- Hayes, D. S. and D. W. Latham, 1975, A Rediscussion of the Atmospheric Extinction and the Absolute Spectral Energy Distribution of Vega, Astrophys. J. 197, 593–601.Google Scholar
- Johnson, F. S., 1954, The Solar Constant, J. Meteorol. 11, 431–439.Google Scholar
- Labs, D. and H. Neckel, 1970, Transformation of the Absolute Solar Radiation Data into the International Practical Temperature Scale of 1968, Solar Phys. 15, 79–87.Google Scholar
- Pellicori, S. F., E. E. Russell, and L. A. Watts, 1973, Pioneer Imaging Photopolarimeter Optical System, Appl. Opt. 12, 1246–1257.Google Scholar
- Stebbins, J. and G. E. Kron, 1957, Six-Color Photometry of Stars. X. The Stellar Magnitude and Color Index of the Sun, Astrophys. J. 126, 266–280.Google Scholar
- Weinberg, J. L., M. S. Hanner, H. M. Mann, P. B. Hutchison, and R. Fimmel, 1973, Observations of Zodiacal Light from the Pioneer 10 Asteroid-Jupiter Probe: Preliminary Results, Space Research XIII, 1187–1192.Google Scholar
- Weinberg, J. L., M. S. Hanner, D. E. Beeson, L. M. DeShields II, and B. A. Green, 1974, Background Starlight Observed from Pioneer 10, J. Geophys. Res. 79, 3665–3670.Google Scholar