The rms–flux relation in accreting white dwarfs: another nova-like variable and the first dwarf nova

The rms–flux relation in accreting white dwarfs: another nova-like variable and the first dwarf nova
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吸积白矮星的均方根-通量关系：另一个类新星变量和第一个矮新星

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发表时间：
2015
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通讯作者：
C. Knigge
C. Knigge
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作者：
M. Sande;S. Scaringi;C. Knigge

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我们报告了在两个样品中检测到的线性均方根-通量关系 吸积白矮星双星系统：V1504 Cyg和KIC 8751494。这个 均方根-通量关系与绝对均方根(RMS)有关 光曲线相对于其平均光通量的可变性。光线曲线 分析是用开普勒卫星以58.8%的S节奏获得的。 RMS-通量关系先前仅在另一个中检测到 激变变量(CV)，MV LYR。这一结果加强了无处不在的 的线性均方根-通量关系作为的特征性质 吸积引起的变异性，因为它已经在几个 黑洞双星、中子星双星和活动星系核。 此外，它在V1504 Cyg中的检测还是第一次检测到均方根通量 在一颗矮星-新星类型的CV中，在静止期间检测到了联系。 这一结果，连同以前的研究，因此指向一个 吸积引起的变异性的共同物理起源，独立于 中心吸积的致密物体的大小、质量或类型。
We report on the detection of the linear rms-flux relation in two accreting white dwarf binary systems: V1504 Cyg and KIC 8751494. The rms-flux relation relates the absolute root-mean-square (rms) variability of the light curve to its mean flux. The light curves analysed were obtained with the Kepler satellite at a 58.8 s cadence. The rms-flux relation was previously detected in only one other cataclysmic variable (CV), MV Lyr. This result reinforces the ubiquity of the linear rms-flux relation as a characteristic property of accretion-induced variability, since it has been observed in several black hole binaries, neutron star binaries and active galactic nuclei. Moreover, its detection in V1504 Cyg is the first time the rms-flux relation has been detected in a dwarf nova-type CV during quiescence. This result, together with previous studies, hence points towards a common physical origin of accretion-induced variability, independent of the size, mass or type of the central accreting compact object.