An interstellar origin for high-inclination Centaurs
Autor(a) principal: | |
---|---|
Data de Publicação: | 2020 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1093/mnras/staa712 http://hdl.handle.net/11449/195402 |
Resumo: | We investigate the possible origins of real high-inclination Centaurs and trans-neptunian objects using a high-resolution statistical search for stable orbits that simulates their evolution back in time to the epoch when planet formation ended 4.5 billion years in the past. The simulation is a precise orbit determination method that does not involve ad hoc initial conditions or assumptions such as those found in planetesimal disc relaxation models upon which their conclusions depend. It can therefore be used to independently test origin theories based on relaxation models by examining the past orbits of specific real objects. Here, we examined 17 multiple-opposition high-inclination Centaurs and the two polar trans-neptunian objects 2008 KV42 and (471325) 2011 KT19. The statistical distributions show that their orbits were nearly polar 4.5 Gyr in the past, and were located in the scattered disc and inner Oort cloud regions. Early polar inclinations cannot be accounted for by current Solar system formation theory as the early planetesimal system must have been nearly flat in order to explain the low-inclination asteroid and Kuiper belts. Furthermore, the early scattered disc and inner Oort cloud regions are believed to have been devoid of Solar system material as the planetesimal disc could not have extended far beyond Neptune's current orbit in order to halt the planet's outward migration. The nearly polar orbits of high-inclination Centaurs 4.5 Gyr in the past therefore indicate their probable early capture from the interstellar medium. |
id |
UNSP_1c411cd73e8aaf4c8fd7a60aa2416aed |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/195402 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
An interstellar origin for high-inclination Centaurscelestial mechanicscomets: generalKuiper belt: generalminor planets, asteroids: generalOort CloudWe investigate the possible origins of real high-inclination Centaurs and trans-neptunian objects using a high-resolution statistical search for stable orbits that simulates their evolution back in time to the epoch when planet formation ended 4.5 billion years in the past. The simulation is a precise orbit determination method that does not involve ad hoc initial conditions or assumptions such as those found in planetesimal disc relaxation models upon which their conclusions depend. It can therefore be used to independently test origin theories based on relaxation models by examining the past orbits of specific real objects. Here, we examined 17 multiple-opposition high-inclination Centaurs and the two polar trans-neptunian objects 2008 KV42 and (471325) 2011 KT19. The statistical distributions show that their orbits were nearly polar 4.5 Gyr in the past, and were located in the scattered disc and inner Oort cloud regions. Early polar inclinations cannot be accounted for by current Solar system formation theory as the early planetesimal system must have been nearly flat in order to explain the low-inclination asteroid and Kuiper belts. Furthermore, the early scattered disc and inner Oort cloud regions are believed to have been devoid of Solar system material as the planetesimal disc could not have extended far beyond Neptune's current orbit in order to halt the planet's outward migration. The nearly polar orbits of high-inclination Centaurs 4.5 Gyr in the past therefore indicate their probable early capture from the interstellar medium.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Funding Authority for Studies and Projects of Brazil (FINEP)Univ Cote Azur, Observ Cote Azur, CNRS, CS 34229, F-06304 Nice, FranceUniv Estadual Paulista, Inst Geociencias & Ciencias Exatas, UNESP, Av 24-A,1515, BR-13506900 Rio Claro, SP, BrazilUniv Estadual Paulista, Inst Geociencias & Ciencias Exatas, UNESP, Av 24-A,1515, BR-13506900 Rio Claro, SP, BrazilFAPESP: FAPESP/2018/08620-1CNPq: Pq2/304037/2018-4Oxford Univ PressUniv Cote AzurUniversidade Estadual Paulista (Unesp)Namouni, F.Morais, M. H. M. [UNESP]2020-12-10T17:33:28Z2020-12-10T17:33:28Z2020-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article2191-2199http://dx.doi.org/10.1093/mnras/staa712Monthly Notices Of The Royal Astronomical Society. Oxford: Oxford Univ Press, v. 494, n. 2, p. 2191-2199, 2020.0035-8711http://hdl.handle.net/11449/19540210.1093/mnras/staa712WOS:000535877200051Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMonthly Notices Of The Royal Astronomical Societyinfo:eu-repo/semantics/openAccess2021-10-22T21:16:04Zoai:repositorio.unesp.br:11449/195402Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-22T21:16:04Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
An interstellar origin for high-inclination Centaurs |
title |
An interstellar origin for high-inclination Centaurs |
spellingShingle |
An interstellar origin for high-inclination Centaurs Namouni, F. celestial mechanics comets: general Kuiper belt: general minor planets, asteroids: general Oort Cloud |
title_short |
An interstellar origin for high-inclination Centaurs |
title_full |
An interstellar origin for high-inclination Centaurs |
title_fullStr |
An interstellar origin for high-inclination Centaurs |
title_full_unstemmed |
An interstellar origin for high-inclination Centaurs |
title_sort |
An interstellar origin for high-inclination Centaurs |
author |
Namouni, F. |
author_facet |
Namouni, F. Morais, M. H. M. [UNESP] |
author_role |
author |
author2 |
Morais, M. H. M. [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Univ Cote Azur Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Namouni, F. Morais, M. H. M. [UNESP] |
dc.subject.por.fl_str_mv |
celestial mechanics comets: general Kuiper belt: general minor planets, asteroids: general Oort Cloud |
topic |
celestial mechanics comets: general Kuiper belt: general minor planets, asteroids: general Oort Cloud |
description |
We investigate the possible origins of real high-inclination Centaurs and trans-neptunian objects using a high-resolution statistical search for stable orbits that simulates their evolution back in time to the epoch when planet formation ended 4.5 billion years in the past. The simulation is a precise orbit determination method that does not involve ad hoc initial conditions or assumptions such as those found in planetesimal disc relaxation models upon which their conclusions depend. It can therefore be used to independently test origin theories based on relaxation models by examining the past orbits of specific real objects. Here, we examined 17 multiple-opposition high-inclination Centaurs and the two polar trans-neptunian objects 2008 KV42 and (471325) 2011 KT19. The statistical distributions show that their orbits were nearly polar 4.5 Gyr in the past, and were located in the scattered disc and inner Oort cloud regions. Early polar inclinations cannot be accounted for by current Solar system formation theory as the early planetesimal system must have been nearly flat in order to explain the low-inclination asteroid and Kuiper belts. Furthermore, the early scattered disc and inner Oort cloud regions are believed to have been devoid of Solar system material as the planetesimal disc could not have extended far beyond Neptune's current orbit in order to halt the planet's outward migration. The nearly polar orbits of high-inclination Centaurs 4.5 Gyr in the past therefore indicate their probable early capture from the interstellar medium. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-10T17:33:28Z 2020-12-10T17:33:28Z 2020-05-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1093/mnras/staa712 Monthly Notices Of The Royal Astronomical Society. Oxford: Oxford Univ Press, v. 494, n. 2, p. 2191-2199, 2020. 0035-8711 http://hdl.handle.net/11449/195402 10.1093/mnras/staa712 WOS:000535877200051 |
url |
http://dx.doi.org/10.1093/mnras/staa712 http://hdl.handle.net/11449/195402 |
identifier_str_mv |
Monthly Notices Of The Royal Astronomical Society. Oxford: Oxford Univ Press, v. 494, n. 2, p. 2191-2199, 2020. 0035-8711 10.1093/mnras/staa712 WOS:000535877200051 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Monthly Notices Of The Royal Astronomical Society |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
2191-2199 |
dc.publisher.none.fl_str_mv |
Oxford Univ Press |
publisher.none.fl_str_mv |
Oxford Univ Press |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965628902146048 |