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arXiv 1004.3783astro-ph.SR
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超新星光回波剖面和光谱的解释

On the Interpretation of Supernova Light Echo Profiles and Spectra

A. Rest, B. Sinnott, D. L. Welch, R. J. Foley, G. Narayan, K. Mandel, M. Huber, S. Blondin

摘要:

银河系和本星系群中历史超新星的光回波系统提供了一个前所未有的机会来揭示非对称性对观测量的影响,特别是光谱。在光回波椭球上不同位置的散射尘埃从不同的角度见证了超新星,因此散射到地球的光保留了超新星光球中不对称性引起的线轮廓变化的形状。然而,超新星光回波光谱的解释迄今为止还没有涉及的爆发持续时间和几何散射的修改,由于有限的散射尘埃丝尺寸,倾斜度,图像点扩散函数和摄谱仪狭缝宽度的影响的详细考虑。在本文中,我们探讨了这些因素的影响,并提出了一个框架,为未来解决超新星光回波光谱的解释,并测试它对Cas A和SN 1987 A光回波光谱。我们的结论是,使用所观察到的光回波在两个或多个时期的散射尘埃的尺寸和方向的完整建模是光回波光谱的正确解释的关键。事实上,如果不这样做,人们可能会错误地得出存在差异的结论,而实际上并不存在差异。

英文摘要:

The light echo systems of historical supernovae in the Milky Way and local group galaxies provide an unprecedented opportunity to reveal the effects of asymmetry on observables, particularly optical spectra. Scattering dust at different locations on the light echo ellipsoid witnesses the supernova from different perspectives and the light consequently scattered towards Earth preserves the shape of line profile variations introduced by asymmetries in the supernova photosphere. However, the interpretation of supernova light echo spectra to date has not involved a detailed consideration of the effects of outburst duration and geometrical scattering modifications due to finite scattering dust filament dimension, inclination, and image point-spread function and spectrograph slit width. In this paper, we explore the implications of these factors and present a framework for future resolved supernova light echo spectra interpretation, and test it against Cas A and SN 1987A light echo spectra. We conclude that the full modeling of the dimensions and orientation of the scattering dust using the observed light echoes at two or more epochs is critical for the correct interpretation of light echo spectra. Indeed, without doing so one might falsely conclude that differences exist when none are actually present.

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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