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Mon. Not. R. Astron. Soc. 000, 000{000 (0000) Printed 15 January 2004 (MN L A T E X style le v2.2) High-eccentricity trans-Neptunian objects as a source of
 

Summary: Mon. Not. R. Astron. Soc. 000, 000{000 (0000) Printed 15 January 2004 (MN L A T E X style le v2.2)
High-eccentricity trans-Neptunian objects as a source of
Jupiter-family comets
V.V. Emel'yanenko 1 , D.J. Asher 2 and M.E. Bailey 2
1 South Ural University, Chelyabinsk, 454080, Russia
2 Armagh Observatory, College Hill, Armagh, BT61 9DG
Last update 2004 January 12; in original form 2003 November
ABSTRACT
The dynamical evolution of trans-Neptunian objects (TNOs) to the inner Solar system
is investigated. The study is based on the observed sample of high-eccentricity TNOs
with perihelia in the near-Neptune region, using a procedure to take account of obser-
vational biases. It is shown that observations favour TNOs in high-eccentricity orbits
as the main source of Jupiter-family (JF) comets. The relative fraction of objects cap-
tured per year from the near-Neptune region to JF comets with perihelion distances
q < 1:5 au is estimated as 0:2  10 10 . The maximum lifetime of typical JF comets
with q <1:5au is approximately 200 revolutions. Based on the observed population of
JF comets, there should be 10 10 TNOs of cometary size in high-eccentricity orbits
with 28 must have been at least 20 times as large as the present one.
Key words: celestial mechanics { comets: general { Edgeworth-Kuiper belt { minor

  

Source: Armagh Observatory

 

Collections: Physics