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arXiv 0807.0983astro-ph
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PSR J0205 +6449的光学观测

Optical Observations of PSR J0205+6449

A. Shearer, V. V. Neustroev

摘要:

PSR J0205+6449是超新星遗迹3C 58中的一颗X射线和射电脉冲星。我们使用4.2米的威廉赫歇尔望远镜观测3C 58的中心区域,目的是识别PSR J0205+6449的光学对应物,并描述其脉冲星风星云。在脉冲星位置周围,我们发现了扩展发射,其星等为$B = 23 \fm 97 \pm 0.10$、$V = 22 \fm 95 \pm 0.05$和$R = 22 \fm 15 \pm 0.03$,与脉冲星风星云一致。从R波段图像中,我们确定了三个结,其中$m_R$ = $24 \fm 08 \pm 0.07$(o1)、$24 \fm 15 \pm 0.07$(o2)和$24 \fm 24 \pm 0.08$(o3)。我们确认PSR J 0205 +6449周围存在一个光学脉冲星风星云,并给出脉冲星的光学星等上限为$m_R \approx$ 24.此外,我们还初步提出,我们的天体o 1($m_R \approx$ 24.08)是光学对应物。如果得到证实,脉冲星将有一个$L_R/L_x\approx 0.004$和大约5%的螃蟹脉冲星的光学效率。这种低效率更符合脉冲星的特征年龄,而不是SN 1181。

英文摘要:

PSR J0205+6449 is a X-ray and radio pulsar in supernova remnant 3C 58. We report on observations of the central region of 3C 58 using the 4.2-m William Herschel Telescope with the intention of identifying the optical counterpart of PSR J0205+6449 and characterising its pulsar wind nebula. Around the pulsar position we identified extended emission with a magnitude of $B = 23 \fm 97 \pm 0.10$, $V = 22 \fm 95 \pm 0.05$ and $R = 22 \fm 15 \pm 0.03$ consistent with a pulsar wind nebula. From the R-band image we identified three knots with $m_R$ = $24 \fm 08 \pm 0.07$ (o1), $24 \fm 15 \pm 0.07$ (o2) and $24 \fm 24 \pm 0.08$ (o3). We confirm the presence of an optical pulsar wind nebula around PSR J0205+6449 and give an upper limit of $m_R \approx$ 24 for the optical magnitude of the pulsar. Furthermore we make the tentative suggestion that our object o1, with an $m_R \approx$ 24.08 is the optical counterpart. If confirmed the pulsar would have an $L_R/L_x\approx 0.004$ and an optical efficiency of about 5% of the Crab pulsar. Such a low efficiency is more consistent with the characteristic age of the pulsar rather than that of SN 1181.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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