Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New Stellar Models - Boon or Bane?   The impact of new stellar evolution models with rotation on the predictions
of population synthesis models is discussed. Massive rotating stars have larger
convective cores than their non-rotating counterparts, and their outer layers
are chemically enriched due to increased mixing. Together, these two effects
lead to hotter and more luminous stars, in particular during later evolutionary
phases. As a result, stellar populations containing massive stars are predicted
to become more luminous for a given mass and to emit more ionizing photons.
Depending on the assumed rotation velocity, rotation causes profound changes in
the properties of young stellar populations. These changes are most noticeable
at later evolutionary phases and at shorter wavelengths of the spectral energy
distribution. Most strikingly, the Lyman continuum luminosity increases by up
to a factor of five in O- and Wolf-Rayet stars. Care is required when comparing
these models to observations, and some fine-tuning of the models is still
required before recalibrations of star-formation indicators should be
attempted.

19
The categories of this paper are: eess
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex