Radial velocity study of the post-period minimum cataclysmic variable SDSS J143317.78+101123.3 with an electron-multiplying CCD
Radial velocity study of the post-period minimum cataclysmic variable SDSS J143317.78+101123.3 with an electron-multiplying CCD
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使用电子倍增 CCD 对后周期最小灾变变量 SDSS J143317.78 101123.3 的径向速度研究
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
V. Dhillon
中科院分区：
文献类型：
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作者：
Simon Tulloch;P. Rodríguez;V. Dhillon
本文报道了用高速低噪声电子倍增CCD相机QUCAM 2对食变星SDSSJ 143317.78 + 101123.3进行的高时间分辨率光谱观测。Littlefair等人（2008年）使用光变曲线拟合技术测量了SDSSJ 143317.78 + 101123.3中的次级星星的质量，得到的值为M2 = 0.060±0.003 M，使其成为在激变变星中首次真正探测到的三颗棕矮星质量供体之一。在本文中，我们提出了一个动态测量支持这一重要结果。我们从Hα发射线的翅膀的运动测量了白色矮星的径向速度半振幅，并获得了K1 = 34 ± 4 km s −1的数字，与Littlefair等人预测的K1 = 35 ± 2 km s −1的值非常一致。的模型。
We present high time-resolution spectroscopy of the eclipsing cataclysmic variable SDSSJ143317.78+101123.3obtained with QUCAM2, a high-speed/low-noise electronmultiplying CCD camera. Littlefair et al. (2008) measured the mass of the secondary star in SDSSJ143317.78+101123.3using a light-curve fitting technique and obtained a value of M2 = 0.060±0.003 M⊙, making it one of the three first bona-fide detections of a brown-dwarf mass donor in a cataclysmic variable. In this paper we present a dynamical measurement supporting this important result. We measured the radialvelocity semi-amplitude of the white dwarf from the motion of the wings of the Hα emission line and obtained a figure of K1 = 34 ± 4 km s −1 , in excellent agreement with the value of K1 = 35 ± 2 km s −1 predicted by Littlefair et al.’s model.