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arXiv 0906.3289astro-ph.GAastro-ph.HE
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在超新星遗迹G0 .9+0.1中发现高能脉冲星J1747-2809

Discovery of the energetic pulsar J1747-2809 in the supernova remnant G0.9+0.1

F. Camilo, S. M. Ransom, B. M. Gaensler, D. R. Lorimer

摘要:

超新星遗迹G0.9+0.1长期以来一直被推断包含一颗中心高能脉冲星。在2 GHz的NRAO绿岸望远镜的观测中,我们探测到了PSR J1747-2809的射电脉动。这颗脉冲星的自转周期为52毫秒,自旋下降光度为4.3e37 erg/s,是已知的银河系中第二大的脉冲星。PSR J1747-2809的色散测量值为1133 pc/cc,根据NE 2001电子密度模型,它的距离约为13 kpc,尽管它可能与银河系中心一样近。脉冲轮廓在2GHz的频率下被极大地散射加宽,使得它在1.4GHz下有效地不可检测,并且非常微弱,在2GHz下具有40 μ J的周期平均通量密度。

英文摘要:

The supernova remnant G0.9+0.1 has long been inferred to contain a central energetic pulsar. In observations with the NRAO Green Bank Telescope at 2 GHz, we have detected radio pulsations from PSR J1747-2809. The pulsar has a rotation period of 52 ms, and a spin-down luminosity of 4.3e37 erg/s, the second largest among known Galactic pulsars. With a dispersion measure of 1133 pc/cc, PSR J1747-2809 is distant, at ~13 kpc according to the NE2001 electron density model, although it could be located as close as the Galactic center. The pulse profile is greatly scatter-broadened at a frequency of 2 GHz, so that it is effectively undetectable at 1.4 GHz, and is very faint, with period-averaged flux density of 40 uJy at 2 GHz.

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