Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Visual orbit of GJ 164 AB   We report seven successful observations of the astrometric binary GJ 164 AB
system with aperture masking interferometry. The companion, with a near
infrared contrast of 5:1 was detected beyond the formal diffraction limit.
Combined with astrometric observations from the literature, these observations
fix the parallax of the system, and allow a model-independent mass
determination of both components. We find the mass of GJ 164B to be $ 0.086 \pm
0.007 M_{\sun}$. An infrared spectroscopic study of a sample of M-Dwarfs
outlines a method for calibrating metallicity of M-Dwarfs. Results from the
newly commissionned TripleSpec spectrograph reveal that the GJ 164 system is at
least of Solar metallicity. Models are not consistent with color and mass,
requiring a very young age to accommodate a secondary too luminous, a scenario
ruled out by the kinematics.

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The categories of this paper are: supr-con
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The categories of this paper are: nlin
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The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph