Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The binary companion of PSR J1740-3052   We report on the identification of a near-infrared counterpart to the massive
(>11 Msun) binary companion of pulsar J1740-3052. An accurate celestial
position of PSR J1740-3052 is determined from interferometric radio
observations. Adaptive optics corrected near-infrared imaging observations show
a counterpart at the interferometric position of the pulsar. The counterpart
has Ks=15.87+-0.10 and J-Ks>0.83. Based on distance and absorption estimates
from models of the Galactic electron and dust distributions these observed
magnitudes are consistent with those of a main-sequence star as the binary
companion. We argue that this counterpart is the binary companion to PSR
J1740-3052 and thus rule out a stellar mass black hole as the pulsar companion.

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The categories of this paper are: atom-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: nlin
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The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga
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The categories of this paper are: physics
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The categories of this paper are: cond-mat
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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: eess
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-th
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The categories of this paper are: funct-an