Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Solar cycle correlation of coronal element abundances in Sun-as-a-star
  observations   The elemental composition in the coronae of low-activity solar-like stars
appears to be related to fundamental stellar properties such as rotation,
surface gravity, and spectral type. Here we use full-Sun observations from the
Solar Dynamics Observatory, to show that when the Sun is observed as a star,
the variation of coronal composition is highly correlated with a proxy for
solar activity, the F10.7 cm radio flux, and therefore with the solar cycle
phase. Similar cyclic variations should therefore be detectable
spectroscopically in X-ray observations of solar analogs. The plasma
composition in full-disk observations of the Sun is related to the evolution of
coronal magnetic field activity. Our observations therefore introduce an
uncertainty into the nature of any relationship between coronal composition and
fixed stellar properties. The results highlight the importance of systematic
full-cycle observations for understanding the elemental composition of
solar-like stellar coronae.

2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
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The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an