Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Is There a Temperature Limit in Planet Formation at 1000 K?   Dust drifting inward in protoplanetary disks is subject to increasing
temperatures. In laboratory experiments, we tempered basaltic dust between 873
K and 1273 K and find that the dust grains change in size and composition.
These modifications influence the outcome of self-consistent low speed
aggregation experiments showing a transition temperature of 1000\,K. Dust
tempered at lower temperatures grows to a maximum aggregate size of $2.02 \pm
0.06$ mm, which is $1.49 \pm 0.08$ times the value for dust tempered at higher
temperatures. A similar size ratio of $1.75 \pm 0.16$ results for a different
set of collision velocities. This transition temperature is in agreement with
orbit temperatures deduced for observed extrasolar planets. Most terrestrial
planets are observed at positions equivalent to less than 1000 K. Dust
aggregation on the millimeter-scale at elevated temperatures might therefore be
a key factor for terrestrial planet formation.

11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex