论文标题
关于Tsesevich的“ YY DRA”的身份
On the identity of Tsesevich's "YY Dra"
论文作者
论文摘要
Hill等。 （2022，ARXIV：2203.00221）最近使用TESS，ASAS-SN和ZTF数据对中间极性DO DRA（YY DRA）进行了分析。他们还尝试使用可变恒星的现代目录来搜索“丢失”的可变YY DRA，但没有发现相应的恒星。这项搜索引起了我们的重新注意，我们研究了Tsesevich（Zessewitch）的原始发现论文。我们发现，他报告的四个变量中有两个丢失或不当研究。从另一个对象中正确位置的坐标偏移远大于预期误差。使用已发表的时期和YY DRA的时期的信息，我们怀疑Tsesevich使用了几个板，这些板是看不见的，而不是从完全分阶段的光曲线中得出。 Do Dra有时会在一个月到几个月的时间里花费大约14个磁场，而Tsesevich观察到在这样的状态下进行DRA并怀疑它是Algol，这也就不足为奇了，敦促他检查板档案以在未发现变量的情况下获得时刻。我们怀疑Tsesevich确实观察到了DRA，而不是不同的，丢失的变量。由于第二次世界大战的结果，几乎不可能到达此事的最后结论，破坏了板块收集的大部分。直到人类变得足够明智，可以恢复这种破坏和足够明智的能力以避免进一步破坏人类的成就，为了使yy dra的指定能够保存，因为我们的消极历史记录了，并且明确的do dra将更好地指定中间的极性3A 1148+719。
Hill et al. (2022, arXiv:2203.00221) recently published analysis of the intermediate polar DO Dra (YY Dra) using TESS, ASAS-SN and ZTF data. They also attempted a search for the "lost" variable YY Dra using modern catalogs of variable stars and found no corresponding one. This search drew our renewed attention and we studied the original discovery paper of YY Dra by Tsesevich (Zessewitch). We found that two out of four variables reported by him were either lost or improperly studied. The coordinate offset from the correct position in another object was much larger than the expected error. Using the information of the published period and epoch of YY Dra, we suspect that Tsesevich used a couple of plates on which the object was invisible to derive the period rather than from a completely phased light curve. DO Dra sometimes spends high states around 14 mag for a month to several months and it would not be surprising if Tsesevich observed DO Dra in such a state and suspected it to be an Algol, urging him to examine the plate archive to obtain the moments when the variable was undetected. We suspect that Tsesevich indeed observed DO Dra, rather than a different, lost eclipsing variable. The final conclusion of this matter is almost impossible to reach due to the consequence of the World War II, destructing the large part of plate collections. Until the humanity becomes wise enough to restore this destruction and wise enough to be able to avoid further destruction of human achievements, the designation YY Dra would better be conserved as a record of our negative history and unambiguous DO Dra would better be used to designate the intermediate polar 3A 1148+719.
