A Disk of Scattered Icy Objects and the Origin of Jupiter-Family Comets-Reference-Cited by-同舟云学术

A Disk of Scattered Icy Objects and the Origin of Jupiter-Family Comets

Published:1997-06-13 Issue:5319 Volume:276 Page:1670-1672
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Duncan Martin J.¹²,Levison Harold F.¹²

Affiliation:

1. M. J. Duncan, Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada.

2. H. F. Levison, Space Science Department, Southwest Research Institute, Boulder, CO 80302, USA.

Abstract

Orbital integrations carried out for 4 billion years produced a disk of scattered objects beyond the orbit of Neptune. Objects in this disk can be distinguished from Kuiper belt objects by a greater range of eccentricities and inclinations. This disk was formed in the simulations by encounters with Neptune during the early evolution of the outer solar system. After particles first encountered Neptune, the simulations show that about 1 percent of the particles survive in this disk for the age of the solar system. A disk currently containing as few as ∼6 × 10 8 objects could supply all of the observed Jupiter-family comets. Two recently discovered objects, 1996 RQ 20 and 1996 TL 66 , have orbital elements similar to those predicted for objects in this disk, suggesting that they are thus far the only members of this disk to be identified.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference38 articles.

1. See H. F. Levison in Completing the Inventory of the Solar System T. W. Rettig and J. M. Hahn Eds. (Astronomical Society of the Pacific San Francisco 1996) p. 173. To be precise a JFC is defined to have a Tisserand parameter T with respect to Jupiter of between 2 and 3. The encounter velocity is v j 3−T where v j is the mean orbital velocity of Jupiter around the sun. JFCs typically have semi-major axes < 7 AU and perihelion distances less than 3 AU. Their mean inclination is ∼10°.

2. On the existence of a comet belt beyond Neptune

3. K. E. Edgeworth J. Br. Astron. Assoc. 53 181 (1943)

4. Mon. Not. R. Astron. Soc. 109 600 (1949)

5. G. Kuiper in Astrophysics: A Topical Symposium J. A. Hynek Ed. (McGraw Hill New York 1951) p. 357.

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