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Title: SPEED LIMIT ON NEPTUNE MIGRATION IMPOSED BY SATURN TILTING

Abstract

In this Letter, we give new constraints on planet migration. They were obtained under the assumption that Saturn's current obliquity is due to a capture in resonance with Neptune's ascending node. If planet migration is too fast, then Saturn crosses the resonance without being captured and it keeps a small obliquity. This scenario thus gives a lower limit on the migration timescale {tau}. We found that this boundary depends strongly on Neptune's initial inclination. For two different migration types, we found that {tau} should be at least greater than 7 Myr. This limit increases rapidly as Neptune's initial inclination decreases from 10 deg. to 1 deg. We also give an algorithm to know if Saturn can be tilted for any migration law.

Authors:
; ;  [1]
  1. Astronomie et Systemes Dynamiques, IMCCE-CNRS UMR8028, Observatoire de Paris, UPMC, 77 Av. Denfert-Rochereau, 75014 Paris (France)
Publication Date:
OSTI Identifier:
21333784
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal (Online)
Additional Journal Information:
Journal Volume: 702; Journal Issue: 1; Other Information: DOI: 10.1088/0004-637X/702/1/L19; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1538-4357
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ALGORITHMS; INCLINATION; NEPTUNE PLANET; SATURN PLANET; SPEED LIMIT

Citation Formats

Boue, Gwenael, Laskar, Jacques, and Kuchynka, Petr. SPEED LIMIT ON NEPTUNE MIGRATION IMPOSED BY SATURN TILTING. United States: N. p., 2009. Web. doi:10.1088/0004-637X/702/1/L19; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).
Boue, Gwenael, Laskar, Jacques, & Kuchynka, Petr. SPEED LIMIT ON NEPTUNE MIGRATION IMPOSED BY SATURN TILTING. United States. https://doi.org/10.1088/0004-637X/702/1/L19; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)
Boue, Gwenael, Laskar, Jacques, and Kuchynka, Petr. 2009. "SPEED LIMIT ON NEPTUNE MIGRATION IMPOSED BY SATURN TILTING". United States. https://doi.org/10.1088/0004-637X/702/1/L19; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).
@article{osti_21333784,
title = {SPEED LIMIT ON NEPTUNE MIGRATION IMPOSED BY SATURN TILTING},
author = {Boue, Gwenael and Laskar, Jacques and Kuchynka, Petr},
abstractNote = {In this Letter, we give new constraints on planet migration. They were obtained under the assumption that Saturn's current obliquity is due to a capture in resonance with Neptune's ascending node. If planet migration is too fast, then Saturn crosses the resonance without being captured and it keeps a small obliquity. This scenario thus gives a lower limit on the migration timescale {tau}. We found that this boundary depends strongly on Neptune's initial inclination. For two different migration types, we found that {tau} should be at least greater than 7 Myr. This limit increases rapidly as Neptune's initial inclination decreases from 10 deg. to 1 deg. We also give an algorithm to know if Saturn can be tilted for any migration law.},
doi = {10.1088/0004-637X/702/1/L19; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)},
url = {https://www.osti.gov/biblio/21333784}, journal = {Astrophysical Journal (Online)},
issn = {1538-4357},
number = 1,
volume = 702,
place = {United States},
year = {Tue Sep 01 00:00:00 EDT 2009},
month = {Tue Sep 01 00:00:00 EDT 2009}
}