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Dynamical Classification of Trans-Neptunian Objects Detected by the Dark Energy Survey

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arxiv 2001.06060 v1 pith:6JVJZDAD submitted 2020-01-16 astro-ph.EP

Dynamical Classification of Trans-Neptunian Objects Detected by the Dark Energy Survey

T. Khain , J. C. Becker , Hsing Wen Lin , D. W. Gerdes , F. C. Adams , P. Bernardinelli , G. M. Bernstein , K. Franson
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L. Markwardt S. Hamilton K. Napier M. Sako T. M. C. Abbott S. Avila E. Bertin D. Brooks E. Buckley-Geer D. L. Burke A. Carnero Rosell M. Carrasco Kind J. Carretero L. N. da Costa J. De Vicente S. Desai H. T. Diehl P. Doel B. Flaugher J. Frieman J. Garcia-Bellido E. Gaztanaga D. Gruen R. A. Gruendl J. Gschwend G. Gutierrez D. L. Hollowood K. Honscheid D. J. James N. Kuropatkin M. A. G. Maia J. L. Marshall F. Menanteau C. J. Miller R. Miquel A. A. Plazas E. Sanchez V. Scarpine M. Schubnell I. Sevilla-Noarbe M. Smith F. Sobreira E. Suchyta M. E. C. Swanson G. Tarle A. R. Walker W. Wester (the DES Collaboration)
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classification astro-ph.EP
keywords objectsclassificationtnosdynamicaloutersolarsystembodies
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The outer Solar System contains a large number of small bodies (known as trans-Neptunian objects or TNOs) that exhibit diverse types of dynamical behavior. The classification of bodies in this distant region into dynamical classes -- sub-populations that experience similar orbital evolution -- aids in our understanding of the structure and formation of the Solar System. In this work, we propose an updated dynamical classification scheme for the outer Solar System. This approach includes the construction of a new (automated) method for identifying mean-motion resonances. We apply this algorithm to the current dataset of TNOs observed by the Dark Energy Survey (DES) and present a working classification for all of the DES TNOs detected to date. Our classification scheme yields 1 inner centaur, 19 outer centaurs, 21 scattering disk objects, 47 detached TNOs, 48 securely resonant objects, 7 resonant candidates, and 97 classical belt objects. Among the scattering and detached objects, we detect 8 TNOs with semi-major axes greater than 150 AU.

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