Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Impact of Starspots on Mass and Age Estimates During The Pre-Main
  Sequence   We investigate the impact of starspots on the evolution of late-type stars
during the pre-main sequence (pre-MS). We find that heavy spot coverage
increases the radii of stars by 4-10%, consistent with inflation factors in
eclipsing binary systems, and suppresses the rate of pre-MS lithium depletion,
leading to a dispersion in zero-age MS Li abundance (comparable to observed
spreads) if a range of spot properties exist within clusters from 3-10 Myr.
This concordance with data implies that spots induce a range of radii at fixed
mass during the pre-MS. These spots decrease the luminosity and $T_{\rm eff}$
of stars, leading to a displacement on the HR diagram. This displacement causes
isochrone derived masses and ages to be systematically under-estimated, and can
lead to the spurious appearance of an age spread in a co-eval population.

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The categories of this paper are: patt-sol
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The categories of this paper are: econ
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The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-th
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The categories of this paper are: physics
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: cmp-lg
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The categories of this paper are: cond-mat
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org