Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The maximum stellar mass, star-cluster formation and composite stellar
  populations   We demonstrate that the mass of the most massive star in a cluster correlates
non-trivially with the cluster mass. A simple algorithm according to which a
cluster is filled up with stars that are chosen randomly from the standard IMF
but sorted with increasing mass yields an excellent description of the
observational data. Algorithms based on random sampling from the IMF without
sorted adding are ruled out with a confidence larger than 0.9999. A physical
explanation of this would be that a cluster forms by more-massive stars being
consecutively added until the resulting feedback energy suffices to revert
cloud contraction and stops further star formation. This has important
implications for composite populations. For example, 10^4 clusters of mass 10^2
Msol will not produce the same IMF as one cluster with a mass of 10^6 Msol. It
also supports the notion that the integrated galaxial IMF (IGIMF) should be
steeper than the stellar IMF and that it should vary with the star-formation
rate of a galaxy.

31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con