Galactic tide and some properties of the Oort cloud

The paper deals with several properties of the Oort cloud of comets. Sun, Galaxy (and Jupiter) gravitationally act on the comets. New physical model of galactic tide is considered. The main results can be summarized as follows: 1. Mass of the Oort cloud of comets is less than 1 mass of the Earth (\(...

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Published in:arXiv.org 2010-05
Main Authors: Klacka, J, Komar, L, Pastor, P, Jurci, M, Honschova, E
Format: Article
Language:English
Subjects:
Comets
Eccentric orbits
Galactic evolution
Galaxies
Jupiter
Mathematical models
Oort cloud
Orbital elements
Solar system
Spacecraft
Tides
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Komar, L
Pastor, P
Jurci, M
Honschova, E
description The paper deals with several properties of the Oort cloud of comets. Sun, Galaxy (and Jupiter) gravitationally act on the comets. New physical model of galactic tide is considered. The main results can be summarized as follows: 1. Mass of the Oort cloud of comets is less than 1 mass of the Earth (\(M_{E}\)), probably not greater than 1/2 \(M_{E}\). 2. Theoretical number of long-period comets with perihelion distance \(q\) \(
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The relation holds for the cases when comets approach the inner part of the Solar System, e.g., perihelion distances are less than \(\approx\) 100 AU. 4. The minimum value of semi-major axis for the Oort cloud is \(a_{min}\) \(\ll\) 1 \(\times\) 10\(^{4}\) AU. This condition was obtained both from the numerical results on cometary evolution under the action of the galactic tides and from the observational distribution of long-period comets. If the density function of semi-major axis is approximated by proportionality \(a^{\alpha}\), then \(\alpha\) is - 1/2, approximately. 5. 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subjects Comets
Eccentric orbits
Galactic evolution
Galaxies
Jupiter
Mathematical models
Oort cloud
Orbital elements
Solar system
Spacecraft
Tides
title Galactic tide and some properties of the Oort cloud
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