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The Detection of Discrete Cyclotron Emission Features in Phase-Resolved Optical Spectroscopy of V1500 Cygni

机译:相位解析中离散回旋加速器发射特征的检测   V1500 Cygni的光谱学

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摘要

We have obtained phase-resolved optical spectroscopy of the old nova, andasynchronous polar V1500 Cyg. These new data reveal discrete cyclotron humpsfrom two different strength magnetic fields. One region has B = 72 MG, whilethe other has B ~ 105 MG. With the detection of these features, we revisit theoptical/near-IR light curves presented in Harrison & Campbell (2016), and findthat the large photometric excesses observed in those data are fullyreconcilable with cyclotron emission. These results, when combined with theX-ray observations that appeared to have maxima that repeated on the orbitalperiod, imply that V1500 Cyg has reverted back to a synchronous polar. Usingexisting theory, we show that the strong field strengths found here can explainthe rapid spin down time.
机译:我们已经获得了新星和异步极性V1500 Cyg的相分辨光谱。这些新数据揭示了来自两个不同强度磁场的离散回旋加速器驼峰。一个区域的B = 72 MG,而另一个区域的B〜105 MG。通过检测这些特征,我们回顾了Harrison和Campbell(2016)中提出的光学/近红外光曲线,发现在这些数据中观察到的较大的光度学过剩与回旋加速器发射完全一致。这些结果与X射线观测结果相结合,似乎在轨道周期上重复出现了最大值,这表明V1500 Cyg已恢复为同步极点。使用现有理论,我们证明此处发现的强大场强可以解释快速的自旋下降时间。

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