Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectroscopically confirmed brown dwarf members of Coma Berenices and
  the Hyades   We have obtained low and medium resolution spectra of 9 brown dwarf candidate
members of Coma Berenices and the Hyades using SpEX on the NASA InfaRed
Telescope Facility and LIRIS on the William Herschel Telescope. We conclude
that 7 of these objects are indeed late M or early L dwarfs, and that two are
likely members of Coma Berenices, and four of the Hyades. Two objects, cbd40
and Hy3 are suggested to be a field L dwarfs, although there is also a
possibility that Hy3 is an unresolved binary belonging to the cluster. These
objects have masses between 71 and 53 M$_{\rm Jup}$, close to the hydrogen
burning boundary for these clusters, however only an optical detection of
Lithium can confirm if they are truly substellar.

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The categories of this paper are: hep-ex
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The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: math-ph
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The categories of this paper are: econ
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The categories of this paper are: math
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The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
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The categories of this paper are: acc-phys