Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The CARMENES search for exoplanets around M dwarfs, No evidence for a
  super-Earth in a 2-day orbit around GJ 1151   The interaction between Earth-like exoplanets and the magnetic field of
low-mass host stars are considered to produce weak emission signals at radio
frequencies. A study using LOFAR data announced the detection of radio emission
from the mid M-type dwarf GJ 1151 that could potentially arise from a close-in
terrestrial planet. Recently, the presence of a 2.5-Me planet orbiting GJ 1151
with a 2-day period has been claimed using 69 radial velocities (RVs) from the
HARPS-N and HPF instruments. We have obtained 70 new high-precision RV
measurements in the framework of the CARMENES M-dwarf survey and use these data
to confirm the presence of the claimed planet and to place limits on possible
planetary companions in the GJ 1151 system. We analyse the periodicities
present in the combined RV data sets from all three instruments and calculate
the detection limits for potential planets in short-period orbits. We cannot
confirm the recently-announced candidate planet and conclude that the 2-day
signal in the HARPS-N and HPF data sets is most probably produced by a
long-term RV variability possibly arising from an outer planetary companion yet
unconstrained. We calculate a 99.9% significance detection limit of 1.50 ms-1
in the RV semi-amplitude, which places upper limits of 0.7 Me and 1.2 Me to the
minimum masses of any potential exoplanets with orbital periods of 1 and 5
days, respectively.

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The categories of this paper are: q-fin
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
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The categories of this paper are: physics
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The categories of this paper are: cond-mat
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The categories of this paper are: alg-geom
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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: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ph
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat