Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The 2MASS Wide-Field T Dwarf Search. I. Discovery of a Bright T Dwarf
  Within 10 pc of the Sun   We present the discovery of a bright (J = 13.94$\pm$0.03) T dwarf, 2MASS
1503+2525, identified in a new, wide-field search for T dwarfs using the
recently completed Two Micron All Sky Survey (2MASS). The 1--2.5 $\micron$
spectrum of this object exhibits the strong H$_2$O and CH$_4$ bands
characteristic of mid- and late-type T dwarfs, and we derive a spectral type of
T5.5 using both the Burgasser et al. and the Geballe et al. classification
schemes. Based on its spectral type and the absolute magnitudes of known T
dwarfs, we estimate the distance of this object as 8$\pm$3 pc if it is single,
likely within 10 pc of the Sun. Our new 2MASS search, which covers 74% of the
sky and greatly expands on earlier color constraints, should identify 15--25
new T dwarfs with J $\leq$ 16. Combined with the 20 known members of this class
that already fall within our search criteria, our new sample will provide
improved statistics for such key quantities as the binary fraction and the
field substellar mass function. Furthermore, multiple detections from
overlapping 2MASS scans provide multiple epoch astrometry and photometry, and
we present proper motions for five T dwarfs in our sample.

24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math