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首页> 外文期刊>The Astrophysical journal >IPHAS?J062746.41+014811.3: A DEEPLY ECLIPSING INTERMEDIATE POLAR
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IPHAS?J062746.41+014811.3: A DEEPLY ECLIPSING INTERMEDIATE POLAR

机译:IPHAS?J062746.41 + 014811.3:深度遮盖中间极性

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摘要

We present time-resolved photometry of a cataclysmic variable discovered in the Isaac Newton Telescope Photometric Hα Survey of the northern galactic plane, IPHAS?J062746.41+014811.3, and classify the system as the fourth deeply eclipsing intermediate polar known with an orbital period of P orb = 8.16?hr and a spin period of P spin = 2210?s. The system shows mild variations of its brightness that appear to be accompanied by a change in the amplitude of the spin modulation at optical wavelengths and a change in the morphology of the eclipse profile. The inferred magnetic moment of the white dwarf is μwd ~ (6-7) × 1033?G?cm3, and in this case IPHAS?J062746.41+014811.3 will evolve either into a short-period EX?Hya-like intermediate polar with a large P spin/Porb ratio or, perhaps more likely, into a synchronized polar. Swift observations show that the system is an ultraviolet and X-ray source, with a hard X-ray spectrum that is consistent with those seen in other intermediate polars. The ultraviolet light curve shows orbital modulation and an eclipse, while the low signal-to-noise ratio X-ray light curve does not show a significant modulation on the spin period. The measured X-ray flux is about an order of magnitude lower than would be expected from scaling by the optical fluxes of well-known X-ray-selected intermediate polars.
机译:我们将介绍在北银河平面IPHAS?J062746.41 + 014811.3的艾萨克·牛顿望远镜光度Hα测量中发现的催化变量的时间分辨光度法,并将该系统分类为已知的第四次深蚀中极,其轨道周期为P orb = 8.16?hr,自旋周期为P spin = 2210?s。该系统显示出其亮度的温和变化,似乎伴随着在光学波长下自旋调制幅度的变化以及日食剖面形态的变化。白矮星的推断磁矩为μwd〜(6-7)×1033?G?cm3,在这种情况下,IPHAS?J062746.41 + 014811.3会演变成短周期的EX?Hya状中间极P自旋/ Porb比率较大,或者更有可能成为同步的极性。迅速的观察表明,该系统是紫外线和X射线源,其硬X射线光谱与在其他中间极中看到的光谱一致。紫外光曲线显示出轨道调制和日食,而低信噪比的X射线光曲线未显示出对自旋周期的显着调制。所测量的X射线通量比通过公知的X射线选择的中间极性的光通量按比例缩放所期望的低大约一个数量级。

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