Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Spectra and Classification of L and T Dwarfs   In this contribution, I discuss some of the salient features of L and T dwarf
spectra in both the red optical (6300--10000 {\AA}) and near-infrared (1--2.5
$\micron$) wavelength regimes. Important absorption bands and lines, including
those of H$_2$O, CH$_4$, FeH, CrH, CO, and the alkali metal lines, are
identified, and the development of recent classification schemes based on these
features are discussed. I briefly point out future work required in these
wavelength regions and in the mid-infrared that are required to garner a
complete picture of these low-luminosity dwarfs.

10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc