Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Limits on low frequency radio emission from southern exoplanets with the
  Murchison Widefield Array   We present the results of a survey for low frequency radio emission from 17
known exoplanetary systems with the Murchison Widefield Array. This sample
includes 13 systems that have not previously been targeted with radio
observations. We detected no radio emission at 154 MHz, and put 3 sigma upper
limits in the range 15.2-112.5 mJy on this emission. We also searched for
circularly polarised emission and made no detections, obtaining 3 sigma upper
limits in the range 3.4-49.9 mJy. These are comparable with the best low
frequency radio limits in the existing literature and translate to luminosity
limits of between 1.2 x 10^14 W and 1.4 x 10^17 W if the emission is assumed to
be 100% circularly polarised. These are the first results from a larger program
to systematically search for exoplanetary emission with the MWA.

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The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
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The categories of this paper are: econ
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: alg-geom