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Paper detail

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.

preprint2010arXivOpen access
C. G. BassaW. F. BriskenG. NelemansI. H. StairsB. W. StappersM. Kramer
astro-ph.HE
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C. G. BassaW. F. BriskenG. NelemansI. H. StairsB. W. StappersM. Kramer

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