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The Canada-France Ecliptic Plane Survey - Full Data Release: The orbital structure of the Kuiper belt | | Jean-Marc Petit
; J.John Kavelaars
; Brett J. Gladman
; R.Lynne Jones
; Joel Wm. Parker
; Christa Van Laerhoven
; Phil Nicholson
; Gilbert Mars
; Philippe. Rousselot
; Olivier Mousis
; Brian Marsden
; Allyson Bieryla
; Matthew Taylor
; Matthew L.N. Ashby
; Paula Benavidez
; Adriano Campo Bagatin
; Guillermo Bernabeu
; | | Date: |
24 Aug 2011 | | Abstract: | We report the orbital distribution of the trans-neptunian objects (TNOs)
discovered during the Canada-France Ecliptic Plane Survey, whose discovery
phase ran from early 2003 until early 2007. The follow-up observations started
just after the first discoveries and extended until late 2009. We obtained
characterized observations of 321 sq.deg. of sky to depths in the range g ~
23.5--24.4 AB mag. We provide a database of 169 TNOs with high-precision
dynamical classification and known discovery efficiency. Using this database,
we find that the classical belt is a complex region with sub-structures that go
beyond the usual splitting of inner (interior to 3:2 mean-motion resonance
[MMR]), outer (exterior to 2:1 MMR), and main (in between). The main classical
belt (a=40--47 AU) needs to be modeled with at least three components: the
’hot’ component with a wide inclination distribution and two ’cold’ components
(stirred and kernel) with much narrower inclination distributions. The hot
component must have a significantly shallower absolute magnitude (Hg)
distribution than the other two components. With 95% confidence, there are
8000+1800-1600 objects in the main belt with Hg <= 8.0, of which 50% are from
the hot component, 40% from the stirred component and 10% from the kernel; the
hot component’s fraction drops rapidly with increasing Hg. Because of this, the
apparent population fractions depend on the depth and ecliptic latitude of a
trans-neptunian survey. The stirred and kernel components are limited to only a
portion of the main belt, while we find that the hot component is consistent
with a smooth extension throughout the inner, main and outer regions of the
classical belt; the inner and outer belts are consistent with containing only
hot-component objects. The Hg <= 8.0 TNO population estimates are 400 for the
inner belt and 10,000 for the outer belt within a factor of two. | | Source: | arXiv, 1108.4836 | | Services: | Forum | Review | PDF | Favorites | |
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