Solar composition of icy planetesimals: a new source for comet nuclei?

Details Solar composition of icy planetesimals: a new source for comet nuclei? Solar composition of icy planetesimals: a new source for comet nuclei?

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..502o&link_type=abstract

Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 July

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The discovery by the Galileo Probe Mass Spectrometer that the heavy elements on Jupiter are enriched by a factor 3 +/- 1 (relative to hydrogen) over solar abundances appears to require the existence of solar composition icy planetesimals (SCIPs) in the early solar system. This requirement is strengthened by the concomitant discovery that the nitrogen on Jupiter must have been delivered in the form of N2 based on the ratio of 15N/14N . These SCIPs are therefore radically different in composition from any comets we know. If SCIPs also formed the cores of the other giant planets they must have been the most abundant solid material in the early solar system. How did they form? Is there evidence that they also struck the forming inner planets? These questions will be addressed but definitive answers remain elusive.

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