Gravitational Capture of Asteroids by Gas Drag
Several irregular satellites of the giant planets were found in the last years. Their orbital configuration suggests that these satellites were asteroids captured by the planets. The restricted three-body problem can explain the dynamics of the capture, but the capture is temporary. It is necessary...
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Series: | Mathematical Problems in Engineering |
Online Access: | http://dx.doi.org/10.1155/2009/897570 |
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doaj-ce33c30b92e6422ea06ffee9c44a3b612020-11-24T21:13:46ZengHindawi LimitedMathematical Problems in Engineering1024-123X1563-51472009-01-01200910.1155/2009/897570897570Gravitational Capture of Asteroids by Gas DragE. Vieira Neto0O. C. Winter1FE-Guaratinguetá, Departamento de Matemática, UNESP—Universidade Estadual Paulista, 12.516-410 SP, BrazilFE-Guaratinguetá, Departamento de Matemática, UNESP—Universidade Estadual Paulista, 12.516-410 SP, BrazilSeveral irregular satellites of the giant planets were found in the last years. Their orbital configuration suggests that these satellites were asteroids captured by the planets. The restricted three-body problem can explain the dynamics of the capture, but the capture is temporary. It is necessary some kind of dissipative effect to turn the temporary capture into a permanent one. In this work we study an asteroid suffering a gas drag at an extended atmosphere of a planet to turn a temporary capture into a permanent one. In the primordial Solar System, gas envelopes were created around the planet. An asteroid that was gravitationally captured by the planet got its velocity reduced and could been trapped as an irregular satellite. It is well known that, depending on the time scale of the gas envelope, an asteroid will spiral and collide with the planet. So, we simulate the passage of the asteroid in the gas envelope with its density decreasing along the time. Using this approach, we found effective captures, and have a better understanding of the whole process. Finally, we conclude that the origin of the irregular satellites cannot be attributed to the gas drag capture mechanism alone.http://dx.doi.org/10.1155/2009/897570 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
E. Vieira Neto O. C. Winter |
spellingShingle |
E. Vieira Neto O. C. Winter Gravitational Capture of Asteroids by Gas Drag Mathematical Problems in Engineering |
author_facet |
E. Vieira Neto O. C. Winter |
author_sort |
E. Vieira Neto |
title |
Gravitational Capture of Asteroids by Gas Drag |
title_short |
Gravitational Capture of Asteroids by Gas Drag |
title_full |
Gravitational Capture of Asteroids by Gas Drag |
title_fullStr |
Gravitational Capture of Asteroids by Gas Drag |
title_full_unstemmed |
Gravitational Capture of Asteroids by Gas Drag |
title_sort |
gravitational capture of asteroids by gas drag |
publisher |
Hindawi Limited |
series |
Mathematical Problems in Engineering |
issn |
1024-123X 1563-5147 |
publishDate |
2009-01-01 |
description |
Several irregular satellites of the giant planets were found in the last years. Their orbital configuration suggests that these
satellites were asteroids captured by the planets. The restricted three-body problem can explain the dynamics of the capture, but
the capture is temporary. It is necessary some kind of dissipative effect to turn the temporary capture into a permanent one. In this
work we study an asteroid suffering a gas drag at an extended atmosphere of a planet to turn a temporary capture into a
permanent one. In the primordial Solar System, gas envelopes were created around the planet. An asteroid that was gravitationally
captured by the planet got its velocity reduced and could been trapped as an irregular satellite. It is well known that, depending on the time scale of the gas envelope, an asteroid will spiral and collide with the planet. So, we simulate the passage of the asteroid in the gas envelope with its density decreasing along the time. Using this approach, we found effective captures, and have a better understanding of the whole process. Finally, we conclude that the origin of the irregular satellites cannot be attributed to the gas drag capture mechanism alone. |
url |
http://dx.doi.org/10.1155/2009/897570 |
work_keys_str_mv |
AT evieiraneto gravitationalcaptureofasteroidsbygasdrag AT ocwinter gravitationalcaptureofasteroidsbygasdrag |
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