Few Comments on the Relation Between the Initial Proto-planetary Disc Model and the Oort Cloud Formation

2009 ◽  
Vol 105 (2-4) ◽  
pp. 367-371
Author(s):  
Tomáš Paulech ◽  
Marián Jakubík ◽  
Luboš Neslušan ◽  
Piotr A. Dybczyński ◽  
Giuseppe Leto
Keyword(s):  
Oort Cloud ◽  
Cloud Formation ◽  
Disc Model

scholarly journals The “memory” of the Oort cloud

2018 ◽  
Vol 620 ◽  
pp. A45 ◽  
Author(s):  
Marc Fouchard ◽  
Arika Higuchi ◽  
Takashi Ito ◽  
Lucie Maquet
Keyword(s):  
Initial Distribution ◽  
Oort Cloud ◽  
Cloud Formation ◽  
Orbital Energy ◽  
Initial Population ◽  
Isotropic Model ◽  
Initial Shape ◽  
Long Period ◽  
Galactic Longitude

Aims. Our aim in this paper is to try to discover if we can find any record of the Oort cloud formation process in the orbital distribution of currently observable long-periodic comets. Methods. Long-term simulations of tens of millions of comets from two different kinds of proto-Oort clouds (isotropic and disk-like) were performed. In these simulations we considered the Galactic tides, stellar passage, and planetary perturbations. Results. In the case of an initially disk-like proto-Oort cloud, the final Oort cloud remains anisotroic inside of about 13 200 au. A record of the initial shape is preserved, here referred to as the “memory”, even on the final distribution of observable comets. This memory is measurable in particular for observable comets for which the previous perihelion was beyond 10 au and that were significantly affected by Uranus or Neptune at that moment (the so-called Kaib-Quinn jumpers observable class). Indeed, these comets are strongly concentrated along an extended scattered disk that is the remnant of the initial population 1 Gyr before the comets are observable. In addition, for this class of comets, the distributions of ecliptic inclination and Galactic longitude of the ascending node at the previous perihelion preceding the observable perihelion highlight characteristics that are not present in the isotropic model. Furthermore, the disk-like model produces four times more observable comets than the isotropic one, and its flux is independent of the initial distribution of orbital energy. Also for the disk-like model, the region beyond Neptune up to ~40 au gives the major contribution to the final flux of observable comets. Conclusions. The disk-like model sustains a flux of observable comets that are more consistent with the actually observed flux than using the isotropic model. However, further investigations are needed to reveal whether a fingerprint of the initial proto-Oort cloud, such as those highlighted in the present article, is present in the sample of known long-period comets.

scholarly journals Probing the relation between the structure of initial proto-planetary disc and the Oort-cloud formation

2010 ◽  
Vol 509 ◽  
pp. A48 ◽  
Author(s):  
T. Paulech ◽  
M. Jakubík ◽  
L. Neslušan ◽  
P. A. Dybczyński ◽  
G. Leto
Keyword(s):  
Oort Cloud ◽  
Cloud Formation

Oort Cloud Formation and Dynamics

Comets II ◽  
2004 ◽  
pp. 153-174
Author(s):  
Luke Dones ◽  
Paul R. Weissman ◽  
Harold F. Levison ◽  
Martin J. Duncan
Keyword(s):  
Oort Cloud ◽  
Cloud Formation

2-Gyr Simulation of the Oort-Cloud Formation. I. Introduction on a New Model of the Outer Oort-Cloud Formation

2009 ◽  
Vol 105 (2-4) ◽  
pp. 257-261 ◽  
Author(s):  
Luboš Neslušan ◽  
Piotr A. Dybczyński ◽  
Giuseppe Leto ◽  
Marián Jakubík ◽  
Tomáš Paulech
Keyword(s):  
Oort Cloud ◽  
Cloud Formation ◽  
New Model

scholarly journals The simulation of the outer Oort cloud formation

2008 ◽  
Vol 487 (1) ◽  
pp. 345-355 ◽  
Author(s):  
P. A. Dybczyński ◽  
G. Leto ◽  
M. Jakubík ◽  
T. Paulech ◽  
L. Neslušan
Keyword(s):  
Oort Cloud ◽  
Cloud Formation

The Usage of the Grid in the Simulation of the Comet Oort-Cloud Formation

2011 ◽  
pp. 293-306
Author(s):  
Giuseppe Leto ◽  
Ján Astaloš ◽  
Marián Jakubík ◽  
Luboš Neslušan ◽  
Piotr A. Dybczyński
Keyword(s):  
Oort Cloud ◽  
Cloud Formation

scholarly journals Notes on the outer-Oort-cloud formation efficiency in the simulation of Oort cloud formation

2009 ◽  
Vol 497 (3) ◽  
pp. 847-850 ◽  
Author(s):  
P. A. Dybczyński ◽  
G. Leto ◽  
M. Jakubík ◽  
T. Paulech ◽  
L. Neslušan
Keyword(s):  
Oort Cloud ◽  
Cloud Formation ◽  
Formation Efficiency

2-Gyr Simulation of the Oort-cloud Formation II. A Close View of the Inner Oort cloud after the First Two Giga-years

2009 ◽  
Vol 105 (2-4) ◽  
pp. 263-266 ◽  
Author(s):  
Giuseppe Leto ◽  
Marián Jakubík ◽  
Tomáš Paulech ◽  
Luboš Neslušan ◽  
Piotr A. Dybczyński
Keyword(s):  
Oort Cloud ◽  
Cloud Formation

scholarly journals Oort cloud formation at various Galactic distances

2010 ◽  
Vol 516 ◽  
pp. A72 ◽  
Author(s):  
R. Brasser ◽  
A. Higuchi ◽  
N. Kaib
Keyword(s):  
Oort Cloud ◽  
Cloud Formation

Dynamics of comets in the collapsing protosolar nebula

1999 ◽  
Vol 173 ◽  
pp. 45-50
Author(s):  
L. Neslušan
Keyword(s):  
Solar System ◽  
Velocity Distribution ◽  
Oort Cloud ◽  
Interstellar Clouds ◽  
Protosolar Nebula ◽  
Moving Bodies

AbstractComets are created in the cool, dense regions of interstellar clouds. These macroscopic bodies take place in the collapse of protostar cloud as mechanically moving bodies in contrast to the gas and miscroscopic dust holding the laws of hydrodynamics. In the presented contribution, there is given an evidence concerning the Solar system comets: if the velocity distribution of comets before the collapse was similar to that in the Oort cloud at the present, then the comets remained at large cloud-centric distances. Hence, the comets in the solar Oort cloud represent a relict of the nebular stage of the Solar system.

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