Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The spectral impact of magnetic activity on disk-integrated HARPS-N
  solar observations: exploring new activity indicators   Stellar activity is the major roadblock on the path to finding true
Earth-analogue planets with the Doppler technique. Thus, identifying new
indicators that better trace magnetic activity (i.e. faculae and spots) is
crucial to aid in disentangling these signals from that of a planet's Doppler
wobble. In this work, we investigate activity related features as seen in
disk-integrated spectra from the HARPS-N solar telescope. We divide
high-activity spectral echelle orders by low-activity master templates (as
defined using both log R'HK and images from the Solar Dynamics Observatory,
SDO), creating "relative spectra". With resolved images of the surface of the
Sun (via SDO), the faculae and spot filling factors can be calculated, giving a
measure of activity independent of, and in addition to, log R'HK. We find
pseudo-emission (and pseudo-absorption) features in the relative spectra that
are similar to those reported in our previous work on alpha Cen B. In alpha Cen
B, the features are shown to correlate better to changes in faculae filling
factor than spot filling factor. In this work we more confidently identify
changes in faculae coverage of the visible hemisphere of the Sun as the source
of features produced in the relative spectra. Finally, we produce trailed
spectra to observe the RV component of the features, which show that the
features move in a redward direction as one would expect when tracking active
regions rotating on the surface of a star.

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The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
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The categories of this paper are: eess
29
The categories of this paper are: funct-an
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The categories of this paper are: stat
0
The categories of this paper are: hep-ph
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The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: econ
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The categories of this paper are: nlin
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The categories of this paper are: q-bio