arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节（Veterans Day），12 日无更新
arXiv 2112.03433astro-ph.SR
收藏

DW Cnc的新光度学和光谱学

New Photometry and Spectroscopy of DW Cnc

S. H. Ramirez, O. Segura Montero, R. Michel, J. Echevarria

备注：
32 pages, 21 figures
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

我们提出了新的观测的灾难性变量DW Cancri，系统从低状态恢复后。我们进行了功率谱分析，揭示了我们的光度数据中的38分钟自旋周期的清晰信号。我们的光谱功率谱搜索与低态之前进行的研究一致，显示了轨道和自旋调制。我们还进行了多普勒断层扫描研究，表现出光盘结构和增强的发射区域，可能与热点组件。通过小波变换分析，我们还发现了70分钟的自旋轨道拍周期的证据。我们将这些结果解释为系统部分恢复的迹象。尽管如此，DW Cnc还没有显示出2004年报道的所有原始光度调制，在经历低状态之前。也就是说，这些信号是38分钟的自旋周期，86分钟的轨道周期，70分钟的拍频周期之间的后面的调制，和一个未解决的110分钟的周期。尽管我们的测光显示了自旋周期调制和108分钟的长周期，但它缺乏拍频和轨道周期信号。因此，我们建议进一步观察DW Cancri，以阐明引起低状态之前观察到的签名的机制是否需要更多的时间来重新激活。

英文摘要：

We present new observations of the cataclysmic variable DW Cancri, after the system recovered from a low state. We performed a power spectrum analysis that reveals a clear signal of the 38 min spin period in our photometric data. Our spectroscopic power spectrum search was consistent with studies performed before the low state, showing the orbital and spin modulations. We also conducted a Doppler Tomography study which exhibits a disc structure and an enhanced emission region, possibly related to a hot spot component. Through a wavelet transform analysis we also found evidence of the 70 min spin-orbit beat period. We interpret these results as indication of a partial recovery of the system. Nonetheless, DW Cnc does not yet show all the original photometric modulations reported in 2004, before experiencing the low state. Namely, these signals are a 38 min spin period, an 86 min orbital period, a 70 min beat period between the latter modulations, and an unresolved 110 min period. Even though our photometry shows a spin cycle modulation and a long 108 min period, it lacks the beat and orbital period signals. Thus, we propose further observations of DW Cancri, to elucidate if the mechanisms giving rise to the signatures observed prior to the low state, require more time to reactivate.

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。

↑