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arXiv 1012.5254astro-ph.HE
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PSR J1740-3052的伴星

The binary companion of PSR J1740-3052

C. G. Bassa, W. F. Brisken, G. Nelemans, I. H. Stairs, B. W. Stappers, M. Kramer

摘要:

我们报告的近红外对应的大质量(>11 Msun)的脉冲星J1740-3052的双星伴星的识别。利用干涉射电观测资料,确定了PSR J1740-3052的精确天体位置。经过自适应光学校正的近红外成像观测结果表明,在脉冲星的干涉位置上有一个对应的位置。对应物具有Ks=15.87+-0.10和J-Ks>0.83。根据距离和吸收估计模型的银河系电子和尘埃分布,这些观测到的星等是一致的主序星作为双伴侣。我们认为,这个对应物是PSR J1740-3052的双星伴星,因此排除了恒星质量的黑洞作为脉冲星伴星的可能性。

英文摘要:

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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