| Type |
Journal Article |
| Names |
G. J. Madsen, R. J. Reynolds, S. I. Ipatov, A. S. Kutyrev, J. C. Mather, S. H. Moseley, H. Krueger, A. Graps |
| Publication |
Dust in Planetary Systems |
| Volume |
643 |
| Pages |
61-64 |
| Date |
January 1, 2007 |
| URL |
http://adsabs.harvard.edu/abs/2007ESASP.643...61M |
| Library Catalog |
NASA ADS |
| Abstract |
We report on new observations of the motion of zodiacal dust using
optical absorption line spectroscopy of zodiacal light. We have measured
the change in the profile shape of the scattered solar Mg I 5184 line
toward several lines of sight in the ecliptic plane as well as the
ecliptic pole. The variation in line centroid and line width as a
function of helio-ecliptic longitude show a clear prograde signature and
suggest that significant fraction of the dust follows non-circular
orbits that are not confined to the ecliptic plane. When combined with
dynamical models, the data suggest that the zodiacal dust is largely
cometary, rather than asteroidal, in origin. |