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arXiv 2604.19367astro-ph.HEastro-ph.GA
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用JWST探索SNR 0540-69.3的核心区域:三维形态

Exploring the central region of SNR 0540-69.3 with JWST I: 3D morphology

KTH Royal Institute of Technology(皇家理工学院);Stellenbosch Institute for Advanced Study (STIAS)(斯坦伦布什高等研究院);Stellenbosch University(斯坦伦布什大学);Stockholm University(斯德哥尔摩大学);European Southern Observatory(欧洲南方天文台)

J. Larsson, C. Tegkelidis, C. Fransson, P. Lundqvist, J. Sollerman, J. Spyromilio

AI总结:

利用JWST观测SNR 0540-69.3核心区域的三维形态,揭示了脉冲星风壳体与周围物质的相互作用,推断出脉冲星踢速并验证了II型超新星的分类。

摘要:

年轻的超新星残骸SNR 0540-69.3位于大麦哲伦星云,提供了高能脉冲星风壳体与周围物质相互作用的详细视图。我们利用JWST的NIRSpec和MRS积分场单元对SNR 0540-69.3核心区域进行了红外观测。从观测中我们重建了最强发射线在内喷射物(≈1000 km/s)中的三维形态,揭示了H I、He I、[Ne II]、[Ne III]、[S III]、[S IV]、[Fe II]和[Ni II]的分布。大多数线的三维形态由两个大小相似的高碎片化lobes主导。基于假设这些lobes围绕脉冲星对称,我们推断出脉冲星踢速约为300 km/s。由于物理条件和丰度的差异,各发射线的三维形态存在差异。检测到内喷射物中的H I 1.8756 μm确认了该SN为II型,并表明氢在爆炸中混合到低速<400 km/s。我们比较了结果与蟹状星云,得出爆炸中的不对称性最可能在塑造PWNe中起主要作用。

英文摘要:

The young supernova remnant SNR 0540-69.3 in the Large Magellanic Cloud offers a detailed view of an energetic pulsar-wind nebula interacting with the surrounding ejecta. We present infrared observations of the central region of SNR 0540-69.3 obtained with the JWST NIRSpec and MRS integral field units. From the observations we reconstruct the 3D morphology of the strongest emission lines in the inner ejecta ($\lesssim$ 1000 km/s), which reveals the distribution of H I, He I, [Ne II], [Ne III], [S III], [S IV], [Fe II], and [Ni II]. The 3D morphology of most lines is dominated by two highly fragmented lobes of approximately similar size. Based on the assumption that the lobes are symmetric around the pulsar, we infer a pulsar kick velocity of ~300 km/s away from the observer. There are differences in the 3D morphologies of individual emission lines due to a combination of varying physical conditions and abundances. The detection of H I 1.8756 $μ$m in the inner ejecta confirms the classification of the SN as a Type II and shows that hydrogen was mixed down to low velocities of < 400 km/s in the explosion. We compare the results to the Crab nebula and conclude that asymmetries originating in the explosion most likely play a major role in shaping the PWNe.

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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