论文标题
DW CNC的新观察结果：38分钟信号在哪里？
New observations of DW Cnc: where is the 38 min signal?
论文作者
论文摘要
我们在2018 - 2019年低状态下，我们介绍了中间极性DW CNC的广泛径向速度观测。我们表明，与轨道周期相关的86分钟信号在我们的径向速度分析，功率谱搜索以及多普勒断层扫描中很强。但是，我们发现与70分钟的搏动周期相关的速度调制，并且38分钟的自旋循环比以前观察到的弱弱。我们为这一变化提出了两种解释。首先是，2018 - 2019年突然下降到一个低状态，导致伴侣的传质发作低，从而抑制了反弹发射产生的轻型房屋效应。第二个是这是克劳福德（Crawford，2008年）在2007年检测到的罕见爆发的结果。我们发现这一爆炸性假设的可能性较小。如果第一种情况是正确的，我们预计DW CNC将恢复其中间极性特征。通过将Patterson et Aal结合起来，提出了一个新的世纪。 （2004）与我们的径向速度。
We present extensive radial-velocity observations of the intermediate polar DW Cnc during its 2018-2019 low state. We show that the 86 min signal, associated with the orbital period is strong in our radial velocity analysis, power spectrum search, as well as in our Doppler Tomography. However, we find that the velocity modulation associated with the 70-min beat period and the 38-min spin cycle are dramatically weaker than previously observed. We put forward two interpretations for this change. The first is that a sudden drop into a low state detected in 2018-2019 caused an episode of low mass transfer from the companion, thus inhibiting the light-house effect produced by the rebound emission. The second is that this is a consequence of a rare outburst detected in 2007 by Crawford (2008). We find this post-outburst hypothesis to be less likely. If the first scenario is correct, we predict that DW Cnc will recover its intermediate polar characteristics. A new ephemeris is presented by combining Patterson et aal. (2004) radial velocities with ours.
