On the population, physical decay and orbital distribution of Jupiter family comets: numerical simulations
We study the Jupiter family comet (JFC) population assumed to come from the Scattered Disk and transferred to the Jupiter’s zone through gravitational interactions with the Jovian planets. We shall define as JFCs those with orbital periods P<20yr and Tisserand parameters in the range 2<T≲3.1,...
Autores principales:  , , 

Formato:  Articulo 
Lenguaje:  Inglés 
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2009

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Acceso en línea:  http://sedici.unlp.edu.ar/handle/10915/2089 http://adsabs.harvard.edu/abs/2009Icar..203..140D http://www.sciencedirect.com/science/article/pii/S0019103509001912# 
Aporte de:  SEDICI (UNLP) de Universidad Nacional de La Plata Ver origen 
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I19R120109152089 

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I19R12010915208920210623T20:05:22Z http://sedici.unlp.edu.ar/handle/10915/2089 http://adsabs.harvard.edu/abs/2009Icar..203..140D http://www.sciencedirect.com/science/article/pii/S0019103509001912# issn:00191035 On the population, physical decay and orbital distribution of Jupiter family comets: numerical simulations Di Sisto, Romina Paula Fernández, Julio A. Brunini, Adrián 2009 20101005T03:00:00Z en Ciencias Astronómicas Comets, dynamics Comets, origin Transneptunian objects We study the Jupiter family comet (JFC) population assumed to come from the Scattered Disk and transferred to the Jupiter’s zone through gravitational interactions with the Jovian planets. We shall define as JFCs those with orbital periods P<20yr and Tisserand parameters in the range 2<T≲3.1, while those comets coming from the same source, but that do not fulfill the previous criteria (mainly because they have periods P>20yr) will be called ‘nonJFCs’. We performed a series of numerical simulations of fictitious comets with a purely dynamical model and also with a more complete dynamicalphysical model that includes besides nongravitational forces, sublimation and splitting mechanisms. With the dynamical model, we obtain a poor match between the computed distributions of orbital elements and the observed ones. However with the inclusion of physical effects in the complete model we are able to obtain good fits to observations. The best fits are attained with four splitting models with a relative weak dependence on q, and a mass loss in every splitting event that is less when the frequency is high and vice versa. The mean lifetime of JFCs with radii R>1km and q<1.5AU is found to be of about 150200 revolutions (˜10<SUP>3</SUP>yr). The total population of JFCs with radii R>1km within Jupiter’s zone is found to be of 450±50. Yet, the population of nonJFCs with radii R>1km in Jupitercrossing orbits may be ˜4 times greater, thus leading to a whole population of JFCs + nonJFCs of ˜2250±250. Most of these comets have perihelia close to Jupiter’s orbit. On the other hand, very few nonJFCs reach the Earth’s vicinity (perihelion distances q≲2AU) which gives additional support to the idea that JFCs and Halleytype comets have different dynamical origins. Our model allows us to define the zones of the orbital element space in which we would expect to find a large number of JFCs. This is the first time, to our knowledge, that a physicodynamical model is presented that includes sublimation and different splitting laws. Our work helps to understand the role played by these erosion effects in the distribution of the orbital elements and lifetimes of JFCs. Facultad de Ciencias Astronómicas y Geofísicas Instituto de Astrofísica de La Plata Articulo Articulo http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) application/pdf 140154 
institution 
Universidad Nacional de La Plata 
institution_str 
I19 
repository_str 
R120 
collection 
SEDICI (UNLP) 
language 
Inglés 
topic 
Ciencias Astronómicas Comets, dynamics Comets, origin Transneptunian objects 
spellingShingle 
Ciencias Astronómicas Comets, dynamics Comets, origin Transneptunian objects Di Sisto, Romina Paula Fernández, Julio A. Brunini, Adrián On the population, physical decay and orbital distribution of Jupiter family comets: numerical simulations 
topic_facet 
Ciencias Astronómicas Comets, dynamics Comets, origin Transneptunian objects 
description 
We study the Jupiter family comet (JFC) population assumed to come from the Scattered Disk and transferred to the Jupiter’s zone through gravitational interactions with the Jovian planets. We shall define as JFCs those with orbital periods P<20yr and Tisserand parameters in the range 2<T≲3.1, while those comets coming from the same source, but that do not fulfill the previous criteria (mainly because they have periods P>20yr) will be called ‘nonJFCs’. We performed a series of numerical simulations of fictitious comets with a purely dynamical model and also with a more complete dynamicalphysical model that includes besides nongravitational forces, sublimation and splitting mechanisms. With the dynamical model, we obtain a poor match between the computed distributions of orbital elements and the observed ones. However with the inclusion of physical effects in the complete model we are able to obtain good fits to observations. The best fits are attained with four splitting models with a relative weak dependence on q, and a mass loss in every splitting event that is less when the frequency is high and vice versa. The mean lifetime of JFCs with radii R>1km and q<1.5AU is found to be of about 150200 revolutions (˜10<SUP>3</SUP>yr). The total population of JFCs with radii R>1km within Jupiter’s zone is found to be of 450±50. Yet, the population of nonJFCs with radii R>1km in Jupitercrossing orbits may be ˜4 times greater, thus leading to a whole population of JFCs + nonJFCs of ˜2250±250. Most of these comets have perihelia close to Jupiter’s orbit. On the other hand, very few nonJFCs reach the Earth’s vicinity (perihelion distances q≲2AU) which gives additional support to the idea that JFCs and Halleytype comets have different dynamical origins. Our model allows us to define the zones of the orbital element space in which we would expect to find a large number of JFCs. This is the first time, to our knowledge, that a physicodynamical model is presented that includes sublimation and different splitting laws. Our work helps to understand the role played by these erosion effects in the distribution of the orbital elements and lifetimes of JFCs. 
format 
Articulo Articulo 
author 
Di Sisto, Romina Paula Fernández, Julio A. Brunini, Adrián 
author_facet 
Di Sisto, Romina Paula Fernández, Julio A. Brunini, Adrián 
author_sort 
Di Sisto, Romina Paula 
title 
On the population, physical decay and orbital distribution of Jupiter family comets: numerical simulations 
title_short 
On the population, physical decay and orbital distribution of Jupiter family comets: numerical simulations 
title_full 
On the population, physical decay and orbital distribution of Jupiter family comets: numerical simulations 
title_fullStr 
On the population, physical decay and orbital distribution of Jupiter family comets: numerical simulations 
title_full_unstemmed 
On the population, physical decay and orbital distribution of Jupiter family comets: numerical simulations 
title_sort 
on the population, physical decay and orbital distribution of jupiter family comets: numerical simulations 
publishDate 
2009 
url 
http://sedici.unlp.edu.ar/handle/10915/2089 http://adsabs.harvard.edu/abs/2009Icar..203..140D http://www.sciencedirect.com/science/article/pii/S0019103509001912# 
work_keys_str_mv 
AT disistorominapaula onthepopulationphysicaldecayandorbitaldistributionofjupiterfamilycometsnumericalsimulations AT fernandezjulioa onthepopulationphysicaldecayandorbitaldistributionofjupiterfamilycometsnumericalsimulations AT bruniniadrian onthepopulationphysicaldecayandorbitaldistributionofjupiterfamilycometsnumericalsimulations 
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