罗曼诺夫V48：周期间隙中不寻常的中间极
Romanov V48: unusual intermediate polar in the period gap
摘要：
我们研究了罗曼诺夫V48，它被认为是一个可能的极性低于周期最小值（轨道周期为0.0420991 d）。我们分析了公开可用的Zwicky Transient Facility数据，发现该物体是一个中间极性，轨道周期为0.102312 d（在周期间隙中），自旋周期为0.0420991 d。自旋变化的幅度非常大（0.6 mag），并且已经证实轮廓随着0.071534 d的拍周期而变化。自旋和轨道周期之间的比率是大的，该系统类似于中间极性DW Cnc低于周期间隙。然而，罗曼诺夫V48的红外辐射无法用次级辐射来解释。红外过剩和光谱能量分布的形状类似于极星，这表明罗曼诺夫V48的发射机制类似于极星。罗曼诺夫V48可以是介于中间极和极之间的中间物体。
英文摘要：
We studied Romanov V48, which had been considered as a possible polar below the period minimum (orbital period of 0.0420991 d). We analyzed the publicly available Zwicky Transient Facility data and found that this object is an intermediate polar with an orbital period of 0.102312 d (in the period gap) and a spin period of 0.0420991 d. The amplitude of the spin variation was very large (0.6 mag) and the profile has been confirmed to vary with the beat period of 0.071534 d. The ratio between the spin and orbital periods was large and the system resembles the intermediate polar DW Cnc below the period gap. Infrared emission from Romanov V48, however, could not be explained by radiation from the secondary. The infrared excess and the shape of the spectral energy distribution resembled those of polars, suggesting that the emission mechanism in Romanov V48 is similar to those of polars. Romanov V48 may be an intermediate object between intermediate polars and polars.
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