Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Debris discs and comet populations around Sun-like stars: the Solar
  System in context   Numerous nearby FGK dwarfs possess discs of debris generated by collisions
among comets. Here we fit the levels of dusty excess observed by Spitzer at
70$\umu$m and show that they form a rather smooth distribution. Taking into
account the transition of the dust removal process from collisional to
Poynting-Robertson drag, all the stars may be empirically fitted by a single
population with many low-excess members. Within this ensemble, the Kuiper Belt
is inferred to be such a low-dust example, among the last 10% of stars, with a
small cometary population. Analogue systems hosting gas giant planets and a
modest comet belt should occur for only a few per cent of Sun-like stars, and
so terrestrial planets with a comparable cometary impact rate to the Earth may
be uncommon. The nearest such analogue system presently known is HD154345 at
18pc, but accounting for survey completeness, a closer example should lie at
around 10pc.

10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin