EFFECT OF STELLAR ENCOUNTERS ON COMET CLOUD FORMATION

@article{Higuchi2015EFFECTOS,
  title={EFFECT OF STELLAR ENCOUNTERS ON COMET CLOUD FORMATION},
  author={Arika Higuchi and Eiichiro Kokubo},
  journal={The Astronomical Journal},
  year={2015},
  volume={150}
}
We have investigated the effect of stellar encounters on the formation and disruption of the Oort cloud using the classical impulse approximation. We calculate the evolution of a planetesimal disk into a spherical Oort cloud due to the perturbation from passing stars for 10 Gyr. We obtain the empirical fits of the e-folding time for the number of Oort cloud comets using the standard exponential and Kohlrausch formulae as functions of the stellar parameters and the initial semimajor axes of… 

Galactic tide and local stellar perturbations on the Oort cloud: creation of interstellar comets

Comets in the Oort cloud evolve under the influence of internal and external perturbations, such as giant planets, stellar passages, and the Galactic gravitational tidal field. We aim to study the

Anisotropy of Long-period Comets Explained by Their Formation Process

  • A. Higuchi
  • Physics, Geology
    The Astronomical Journal
  • 2020
Long-period comets coming from the Oort cloud are thought to be planetesimals formed in the planetary region on the ecliptic plane. We have investigated the orbital evolution of these bodies due to

Effects of inclined star-disk encounter on protoplanetary disk size

Most, if not all, young stars are initially surrounded by protoplanetary disks. Owing to the preferential formation of stars in stellar clusters, the protoplanetary disks around these stars may

Oort cloud Ecology

Jan Hendrik Oort hypothesized the existence of a distant cloud of cometary objects that orbit the Sun based on a spike in the reciprocal orbital separation at 1∕a  ≲  10−4 au−1. The Oort cloud is the

Origin and Evolution of Long-period Comets

We develop an evolutionary model of the long-period comet (LPC) population, starting from their birthplace in a massive trans-Neptunian disk that was dispersed by migrating giant planets. Most comets

Long-period comets as a tracer of the Oort cloud structure

A previous study showed that a fingerprint of the initial shape of synthetic Oort clouds was detectable in the flux of “new” long-period comets. The present study aims to explain in detail how such a

Chaos in the inert Oort cloud

Context. Distant trans-Neptunian objects are subject to planetary perturbations and galactic tides. The former decrease with the distance, while the latter increase. In the intermediate regime where

Long-term orbital dynamics of trans-Neptunian objects

  • M. Saillenfest
  • Physics, Geology
    Celestial Mechanics and Dynamical Astronomy
  • 2020
This article reviews the different mechanisms affecting the orbits of trans-Neptunian objects, ranging from internal perturbations (planetary scattering, mean-motion resonances, and secular effects)

Long-term orbital dynamics of trans-Neptunian objects

This article reviews the different mechanisms affecting the orbits of trans-Neptunian objects, ranging from internal perturbations (planetary scattering, mean-motion resonances, and secular effects)

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