Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.5403r&link_type=abstract
American Astronomical Society, DPS meeting #39, #54.03; Bulletin of the American Astronomical Society, Vol. 39, p.524
Astronomy and Astrophysics
Astronomy
Scientific paper
The fragments and debris from the split comet 73P/Schwassmann-Wachmann 3 were observed with the Spitzer and Hubble Space Telescopes, revealing the distribution of fragments on sizes from the major nuclei (km) down to dust (10 microns). The dust particles form a tail in the antisolar direction due to radiation pressure. The large fragments and meteoroids form a trail arranged along the projected orbit. Intermediate-sized fragments detected by HST move with the dust in the tailward direction. We interpret the dynamics by combining radiation pressure and reflex momentum loss due to outgassing (rocket effect). The HST fragments must be very icy, while the meteoroids must be very dry. We discuss the relationship between the observed fragments and the cometary nuclei and the nature of cometary material.
Kelley Michael S.
Lisse Carey Michael
Reach William T.
Vaubaillon Jeremie
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