Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Eclipsing Substellar Binary in a Young Triple System discovered by
  SPECULOOS   Mass, radius, and age are three of the most fundamental parameters for
celestial objects, enabling studies of the evolution and internal physics of
stars, brown dwarfs, and planets. Brown dwarfs are hydrogen-rich objects that
are unable to sustain core fusion reactions but are supported from collapse by
electron degeneracy pressure. As they age, brown dwarfs cool, reducing their
radius and luminosity. Young exoplanets follow a similar behaviour. Brown dwarf
evolutionary models are relied upon to infer the masses, radii and ages of
these objects. Similar models are used to infer the mass and radius of directly
imaged exoplanets. Unfortunately, only sparse empirical mass, radius and age
measurements are currently available, and the models remain mostly unvalidated.
Double-line eclipsing binaries provide the most direct route for the absolute
determination of the masses and radii of stars. Here, we report the SPECULOOS
discovery of 2M1510A, a nearby, eclipsing, double-line brown dwarf binary, with
a widely-separated tertiary brown dwarf companion. We also find that the system
is a member of the $45\pm5$ Myr-old moving group, Argus. The system's age
matches those of currently known directly-imaged exoplanets. 2M1510A provides
an opportunity to benchmark evolutionary models of brown dwarfs and young
planets. We find that widely-used evolutionary models do reproduce the mass,
radius and age of the binary components remarkably well, but overestimate the
luminosity by up to 0.65 magnitudes, which could result in underestimated
photometric masses for directly-imaged exoplanets and young field brown dwarfs
by 20 to 35%.

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The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
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The categories of this paper are: q-bio