Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coronal properties of planet-bearing stars   Do extrasolar planets affect the activity of their host stars? Indications
for chromospheric activity enhancement have been found for a handful of
targets, but in the X-ray regime, conclusive observational evidence is still
missing. We want to establish a sound observational basis to confirm or reject
major effects of Star-Planet Interactions (SPI) in stellar X-ray emissions. We
therefore conduct a statistical analysis of stellar X-ray activity of all known
planet-bearing stars within 30pc distance for dependencies on planetary
parameters such as mass and semimajor axis. We find that in our sample, there
are no significant correlations of X-ray luminosity or the activity indicator
L_X/L_bol with planetary parameters which cannot be explained by selection
effects. Coronal SPI seems to be a phenomenon which might only manifest itself
as a strong effect for a few individual targets, but not to have a major effect
on planet-bearing stars in general.

29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph