Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Uncovering the ultimate planet impostor. An eclipsing brown dwarf in a
  hierarchical triple with two evolved stars   Exoplanet searches through space-based photometric time series have shown to
be very efficient in recent years. However, follow-up efforts on the detected
planet candidates have been demonstrated to be critical to uncover the true
nature of the transiting objects. In this paper we show a detailed analysis of
one of those false positives hidden as planetary signals. In this case, the
candidate KOI-3886.01 showed clear evidence of a planetary nature from various
techniques. Indeed, the properties of the fake planet set it among the most
interesting and promising for the study of planetary evolution as the star
leaves the main sequence. To unveil the true nature of this system, we present
a complete set of observational techniques including high-spatial resolution
imaging, high-precision photometric time series (showing eclipses, phase curve
variations and asteroseismology signals), high-resolution spectroscopy and
derived radial velocities, to unveil the true nature of this planet candidate.
We find that KOI-3886.01 is an interesting false positive case: a hierarchical
triple system composed by a $\sim$K2III giant star (KOI-3886A) accompanied by a
close-in eclipsing binary formed by a subgiant $\sim$G4IV star (KOI-3886B) and
a brown dwarf (KOI-3886C). In particular, KOI-3886C is one of the most
irradiated brown dwarfs known to date, showing the largest radius in this
substellar regime. It is also the first eclipsing brown dwarf known around an
evolved star. In this paper we highlight the relevance of complete sets of
follow-up observations to extrasolar planets detected by the transit technique
using large-pixel photometers such as Kepler and TESS, and in the future,
PLATO. In particular, multi-color high-spatial resolution imaging was the first
hint toward ruling out the planet scenario in this system.

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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
35
The categories of this paper are: mtrl-th
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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin