The relationship between Centaurs and Jupiter Family Comets with implications for K-Pg-type impacts

Grazier, K. R. and Horner, J. and Castillo-Rogez, J. C. (2019) The relationship between Centaurs and Jupiter Family Comets with implications for K-Pg-type impacts. Monthly Notices of the Royal Astronomical Society, 490 (3). pp. 4388-4400. ISSN 0035-8711

[img]
Preview
Text (Published Version)
KPg.pdf

Download (3MB) | Preview

Abstract

Centaurs - icy bodies orbiting beyond Jupiter and interior to Neptune - are believed to be dynamically related to Jupiter Family Comets (JFCs), which have aphelia near Jupiter's orbit and perihelia in the inner Solar system. Previous dynamical simulations have recreated the Centaur/JFC conversion, but the mechanism behind that process remains poorly described. We have performed a numerical simulation of Centaur analogues that recreates this process, generating a data set detailing over 2.6 million close planet/planetesimal interactions. We explore scenarios stored within that data base and, from those, describe the mechanism by which Centaur objects are converted into JFCs. Because many JFCs have perihelia in the terrestrial planet region, and since Centaurs are constantly resupplied from the Scattered Disc, the JFCs are an ever- present impact threat.


Statistics for USQ ePrint 37419
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2019 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Date Deposited: 28 Jan 2020 00:00
Last Modified: 29 Jan 2020 05:30
Uncontrolled Keywords: celestial mechanics; comets: general; minor planets; asteroids:; general; Astrophysics - Earth and Planetary Astrophysics
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020101 Astrobiology
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: https://doi.org/10.1093/mnras/stz2872
URI: http://eprints.usq.edu.au/id/eprint/37419

Actions (login required)

View Item Archive Repository Staff Only