论文标题
被忽视的X射线发现了Polar：III。 RX J0154.0-5947，RX J0600.5-2709，RX J0859.1+0537，RX J0953.1+1458和RX J1002.2-1925
Neglected X-ray discovered polars: III. RX J0154.0-5947, RX J0600.5-2709, RX J0859.1+0537, RX J0953.1+1458, and RX J1002.2-1925
论文作者
论文摘要
我们报告了ROSAT发现的未分解的短期杆RX J0154.0-5947，RX J0600.5-2709，RX J0859.1+0537，RX J0953.1+1458和RX J1002.2-1925收集了30年以上。我们提出了准确的线性轨道胚膜，该轨道允许对数十年的数据进行正确的分阶段。三个系统显示了回旋和Zeeman线，分别为最后三个目标产生36 mg，19 mg和33 mg的磁场强度。 RX J0154.0-5947，RX J0859.1+0537和RX J1002.2-1925显示了两种磁极处兼职积聚的证据，而RX J0953.1+1458是具有稳定的一底几何形状的极性。 RX J1002.2-1925在其光曲线的形状中显示出较大的变化，我们与不稳定的积聚几何形状相关联。然而，它似乎已同步。我们确定了五颗星的盖亚距离处的侧力软和硬X射线通量以及亮度。结合对回旋发光度的估计，我们得出了高州的高态率，范围从$ \ dot m = 2.9 \ times 10^{ - 11} $ $ m _ {\ odot} $ yr $^{ - 1} $矮质量在0.61至0.82 $ m_ \ odot $之间，这与基于观察到的在杆子中观察到的有效温度和压缩加热理论的预测一致。我们的分析支持了以下假设：短期杆子和非磁性灾难变量的亚组的不同平均积聚率的不同。
We report results on the ROSAT-discovered noneclipsing short-period polars RX J0154.0-5947, RX J0600.5-2709, RX J0859.1+0537, RX J0953.1+1458, and RX J1002.2-1925 collected over 30 years. We present accurate linear orbital ephemerides that allow a correct phasing of data taken decades apart. Three of the systems show cyclotron and Zeeman lines that yield magnetic field strengths of 36 MG, 19 MG, and 33 MG for the last three targets, respectively. RX J0154.0-5947, RX J0859.1+0537, and RX J1002.2-1925 show evidence for part-time accretion at both magnetic poles, while RX J0953.1+1458 is a polar with a stable one-pole geometry. RX J1002.2-1925 shows large variations in the shapes of its light curves that we associate with an unstable accretion geometry. Nevertheless, it appears to be synchronized. We determined the bolometric soft and hard X-ray fluxes and the luminosities at the Gaia distances of the five stars. Combined with estimates of the cyclotron luminosities, we derived high-state accretion rates that range from $\dot M = 2.9 \times 10^{-11}$ $M_{\odot}$yr$^{-1}$ to $9.7 \times 10^{-11}$ $M_{\odot}$yr$^{-1}$ for white dwarf masses between 0.61 and 0.82 $M_\odot$, in agreement with predictions based on the observed effective temperatures of white dwarfs in polars and the theory of compressional heating. Our analysis lends support to the hypothesis that different mean accretion rates appply for the subgroups of short-period polars and nonmagnetic cataclysmic variables.
