Collisional model of asteroids and their debris

In summary, the conversation is about a request for an urgent article on the collisional model of asteroids and their debris. The article is titled "The random walk of Main Belt asteroids: orbital mobility by non-destructive collisions" and is authored by A. Dell'Oro and A. Cellino. The conversation also mentions a related article that may be of interest and the difficulties in determining the effects of non-destructive collisions on asteroid orbits. The article's findings and conclusions are also briefly summarized.
  • #1
Mateja
7
0
Can anyone send me this article? its urgent!

Title:
Collisional model of asteroids and their debris
Authors:
Dohnanyi, J. S.
Publication:
J. Geophys. Res., vol. 74, p. 2431-2554 (1969). (JGR Homepage)
Publication Date:
00/1969
Origin:
AP
Bibliographic Code:
1969JGR...74.2431D

[send me pm if you have it and i will give you e-mail]

thanks!
 
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  • #3
thanks , that was helpful!
 
  • #4
Can anyone send me THIS article? its urgent! :D

seriously i REALLY need it ...

The random walk of Main Belt asteroids: orbital mobility by non-destructive collisions
A. Dell'Oro and A. Cellino
National Institut for Astrophysics, Astronomical Observatory of Turin, Strada Osservatorio 20, Pino Torinese 10025, Italy
Monthly Notices of the Royal Astronomical Society

Non-destructive collisions among Main Belt asteroids have effects on their orbits due to the transmission of linear momentum. The efficiency of this mechanism depends on several parameters which are currently poorly known. The most critical aspects are (i) the inventory and size distribution of small Main Belt asteroids, with sizes well below a few kilometres; (ii) the energy threshold for collisional fragmentation and fragment dispersion and (iii) the efficiency of linear momentum transfer. In spite of these difficulties, a general statistical model of the dynamical effects of non-destructive collisions can be developed, and is presented here. Based on this model, the consequences of different assumptions concerning the asteroid size distribution and collision physics are computed and discussed. Quantitative evaluations of the collisionally induced orbital mobility in different possible scenarios are presented.

http://www3.interscience.wiley.com/journal/117975552/abstract?CRETRY=1&SRETRY=0
 

1. What is the collisional model of asteroids and their debris?

The collisional model of asteroids and their debris is a scientific theory that explains the formation and evolution of asteroid populations in our Solar System. It proposes that collisions between larger asteroids in the asteroid belt produce smaller debris fragments, which can then collide with other asteroids, leading to a continuous cycle of fragmentation and regeneration.

2. How does the collisional model explain the size distribution of asteroids?

The collisional model suggests that the size distribution of asteroids is a result of the collisions between larger asteroids. As these collisions occur, they produce debris fragments of various sizes, with smaller fragments being more abundant due to their higher collision rate. This leads to a power-law distribution, where there are fewer large asteroids and more small asteroids.

3. What evidence supports the collisional model of asteroids and their debris?

There are several pieces of evidence that support the collisional model. One is the observation of asteroid families, which are groups of asteroids with similar compositions and orbits that are believed to have originated from a single parent body that was shattered by a collision. Another is the presence of asteroid families with different ages, indicating a continuous process of fragmentation and regeneration. Additionally, simulations of asteroid collisions have shown that they can reproduce the observed size distribution of asteroids.

4. How does the collisional model impact our understanding of the origin of the Solar System?

The collisional model plays a significant role in our understanding of the origin of the Solar System. It suggests that the early Solar System was a chaotic and violent place, with frequent collisions between protoplanets and smaller bodies. These collisions played a crucial role in shaping the structure and composition of our Solar System, and understanding them can provide insights into the formation of other planetary systems in the universe.

5. Are there any limitations to the collisional model of asteroids and their debris?

While the collisional model is widely accepted, it is not without its limitations. One limitation is that it does not fully explain the formation of some types of asteroids, such as those with highly elongated or inclined orbits. Additionally, there is ongoing research and debate about the role of other factors, such as the Yarkovsky effect (a force that can alter the orbits of small asteroids), in shaping the asteroid population.

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