NDLI: The Dynamics of Objects in the Inner Edgeworth

Content Provider	Springer Nature Link
Author	Jones, Daniel C. Williams, Iwan P. Melita, Mario D.
Copyright Year	2006
Abstract	Objects in 3:2 mean motion resonance with Neptune are protected from close encounters with Neptune by the resonance. Bodies in orbits with semi-major axis between 39.5 and about 42 AU are not protected by the resonance; indeed due to overlapping secular resonances, the eccentricities of orbits in this region are driven up so that a close encounter with Neptune becomes inevitable. It is thus expected that such orbits are unstable. The list of known Trans-Neptunian objects shows a deficiency in the number of objects in this gap compared to the 43–50 AU region, but the gap is not empty. We numerically integrate models for the initial population in the gap, and also all known objects over the age of the Solar System to determine what fraction can survive. We find that this fraction is significantly less than the ratio of the population in the gap to that in the main belt, suggesting that some mechanism must exist to introduce new members into the gap. By looking at the evolution of the test body orbits, we also determine the manner in which they are lost. Though all have close encounters with Neptune, in most cases this does not lead to ejection from the Solar System, but rather to a reduced perihelion distance causing close encounters with some or all of the other giant planets before being eventually lost from the system, with Saturn appearing to be the cause of the ejection of most of the objects.
Starting Page	435
Ending Page	458
Page Count	24
File Format	PDF
ISSN	01679295
Journal	Earth, Moon, and Planets
Volume Number	97
Issue Number	3-4
e-ISSN	15730794
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-04-20
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Celestial mechanics Numerical methods: N-body Trans-Neptunian objects Astrophysics Extraterrestrial Physics, Space Sciences Planetology Astronomy
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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