Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Asteroseismic measurement of surface-to-core rotation in a main sequence
  A star, KIC 11145123   We have discovered rotationally split core g-mode triplets and surface p-mode
triplets and quintuplets in a terminal age main sequence A star, KIC 11145123,
that shows both $\delta$ Sct p-mode pulsations and $\gamma$ Dor g-mode
pulsations. This gives the first robust determination of the rotation of the
deep core and surface of a main sequence star, essentially model-independently.
We find its rotation to be nearly uniform with a period near 100 d, but we show
with high confidence that the surface rotates slightly faster than the core. A
strong angular momentum transfer mechanism must be operating to produce the
nearly rigid rotation, and a mechanism other than viscosity must be operating
to produce a more rapidly rotating surface than core. Our asteroseismic result,
along with previous asteroseismic constraints on internal rotation in some B
stars, and measurements of internal rotation in some subgiant, giant and white
dwarf stars, has made angular momentum transport in stars throughout their
lifetimes an observational science.

34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
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The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: quant-ph
3
The categories of this paper are: physics
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
1
The categories of this paper are: cs
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The categories of this paper are: atom-ph
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The categories of this paper are: q-alg
14
The categories of this paper are: math-ph