Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Asteroid impacts on terrestrial planets: The effects of super-Earths and
  the role of the $\nu_6$ resonance   With N-body simulations of a planetary system with an asteroid belt we
investigate how the asteroid impact rate on the Earth is affected by the
architecture of the planetary system. We find that the $\nu_6$ secular
resonance plays an important role in the asteroid collision rate with the
Earth. Compared to exoplanetary systems, the solar system is somewhat special
in its lack of a super-Earth mass planet in the inner solar system. We
therefore first consider the effects of the presence of a super-Earth in the
terrestrial planet region. We find a significant effect for super-Earths with a
mass of around $10\,\rm M_\oplus$ and a separation greater than about $0.7\,\rm
AU$. For a super-Earth that is interior to the Earth's orbit, the number of
asteroids colliding with Earth increases the closer the super-Earth is to the
Earth's orbit. This is the result of multiple secular resonance locations
causing more asteroids to be perturbed onto Earth-crossing orbits. When the
super-Earth is placed exterior to Earth's orbit, the collision rate decreases
substantially because the $\nu_6$ resonance no longer exists in the asteroid
belt region. We also find that changing the semi-major axis of Saturn leads to
a significant decrease in the asteroid collision rate, while increasing its
mass increases the collision rate. These results may have implications for the
habitability of exoplanetary systems.

17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th