Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fast-evolving weather for the coolest of our two new substellar
  neighbours   We present the results of an intense photometric monitoring in the
near-infrared (~0.9 microns) with the TRAPPIST robotic telescope of the newly
discovered binary brown dwarf WISE J104915.57-531906.1, the third closest
system to the Sun at a distance of only 2 pc. Our twelve nights of photometric
time-series reveal a quasi-periodic (P = 4.87+-0.01 h) variability with a
maximal peak-peak amplitude of ~11% and strong night-to-night evolution. We
attribute this variability to the rotational modulation of fast-evolving
weather patterns in the atmosphere of the coolest component (~T1-type) of the
binary, in agreement with the cloud fragmentation mechanism proposed to drive
the spectroscopic morphologies of brown dwarfs at the L/T transition. No
periodic signal is detected for the hottest component (~L8-type). For both
brown dwarfs, our data allow us to firmly discard any unique transit during our
observations for planets >= 2 Rearth. For orbital periods smaller than ~9.5 h,
transiting planets are excluded down to an Earth-size.

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The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
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The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-th