A dynamical analysis of the Taurid Complex: evidence for past orbital convergences
| Autor: | Paul Wiegert, Pavel Spurný, Peter Brown, Auriane Egal, Giovanni B. Valsecchi, Jiri Borovicka |
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| Přispěvatelé: | Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Similarity (geometry)
010504 meteorology & atmospheric sciences Comet FOS: Physical sciences Astrophysics 01 natural sciences Parent body meteorites methods: numerical comets: individual: 2P/Encke Intersection 0103 physical sciences meteors meteoroids Instrumentation and Methods for Astrophysics (astro-ph.IM) 010303 astronomy & astrophysics 0105 earth and related environmental sciences Earth and Planetary Astrophysics (astro-ph.EP) Physics [PHYS]Physics [physics] Meteoroid Fragmentation (computing) Astronomy and Astrophysics asteroids: general Orbit Space and Planetary Science Asteroid minor planets [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Astrophysics - Instrumentation and Methods for Astrophysics Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, 2021, 507 (2), pp.2568-2591. ⟨10.1093/mnras/stab2237⟩ Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2021, 507 (2), pp.2568-2591. ⟨10.1093/mnras/stab2237⟩ |
| ISSN: | 0035-8711 1365-2966 |
| Popis: | The goal of this work is to determine if the dynamics of individual Taurid Complex (TC) objects are consistent with the formation of the complex via fragmentation of a larger body, or if the current orbital affinities between the TC members result from other dynamical processes. To this end, the orbital similarity through time of comet 2P/Encke, fifty-one Near-Earth Asteroids (NEAs) and sixteen Taurid fireballs was explored. Clones of each body were numerically simulated backwards in time, and epochs when significant fractions of the clones of any two bodies approached each other with both a low Minimum Orbit Intersection Distance and small relative velocity were identified. Only twelve pairs of bodies in our sample show such an association in the past 20 000 years, primarily circa 3200 BCE. These include 2P/Encke and NEAs 2004 TG10, 2005 TF50, 2005 UR, 2015 TX24, and several Southern Taurid fireballs. We find this orbital convergence to be compatible with the fragmentation of a large parent body five to six thousand years ago, resulting in the separation of 2P/Encke and several NEAs associated with the TC, as well as some larger meteoroids now recorded in the Taurid stream. However, the influence of purely dynamical processes may offer an alternative explanation for this orbital rapprochement without requiring a common origin between these objects. In order to discriminate between these two hypotheses, future spectral surveys of the TC asteroids are required. This paper has been accepted for publication in MNRAS, on July 30 2021 |
| Databáze: | OpenAIRE |
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