Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collision parameters governing water delivery and water loss in early
  planetary systems   We investigate the distribution of encounter velocities and impact angles
describing collisions in the habitable zone of the early planetary system. Here
we present a catalogue of collision characteristics for a particular mass ratio
of the colliding bodies and seven different planetesimal masses ranging from a
tenth of Ceres' mass to 10 times the mass of the Moon. We show that there are
virtually no collisions with impact speeds lower than the surface escape
velocity and a similar velocity-impact angle distribution for different
planetesimal masses if velocities are normalized using the escape velocity. An
additional perturbing Jupiter-like object distorts the collision velocity and
impact picture in the sense that grazing impacts at higher velocities are
promoted if the perturber's orbit is close to the habitable zone whereas a more
distant perturber has more the effect of a mere widening of the velocity
dispersion.

11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
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The categories of this paper are: solv-int
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The categories of this paper are: funct-an
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The categories of this paper are: alg-geom
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th