论文标题
重新访问XO-3系统的完整轨道参数：没有证据表明自旋角度的时间变化
Revisiting the Full Sets of Orbital Parameters for the XO-3 System: No evidence for Temporal Variation of the Spin-Orbit Angle
论文作者
论文摘要
我们为XO-3系统提供了12条新的过境光曲线和16个新的透射径向速度测量。通过对新收集的测量结果进行建模，并与档案光度法和多普勒速度数据进行建模，我们确认了XO-3系统的异常配置，其中包含一个庞大的行星（$ m_p = 11.92^{+0.59} _ {-0.63} m_j $） （$ e = 0.2853^{+0.0027} _ { - 0.0026} $）和短period（$ 3.19152 \ pm 0.00145 \，$ day）围绕巨大的星星（$ m _*= 1.219^= 1.219^{+0.090} _} $ _ {$ 0.095} $ { - 0.095} $ ocy。此外，我们没有发现$ v \ sin i _ {*} $的时间变化的强有力的证据（并且按扩展为XO-3的恒星自旋向量）或Transit曲线（因此是XO-3B的轨道角动量向量）。我们得出的结论是，以前的Rossiter-McLaughlin测量值（$ 70.0^{\ Circ} \ pm 15.0^{\ Circ} $（Hebrard etal。2008）; $ 37.3^{\ circ} {\ circ} \ circ} \ pm 3.7^{\ circ} {\ circ} $（winn et al.2009） 3.0^{\ circ} $（Hirano等人2011））可能源于系统的噪声源。
We present 12 new transit light curves and 16 new out-of-transit radial velocity measurements for the XO-3 system. By modelling our newly collected measurements together with archival photometric and Doppler velocimetric data, we confirmed the unusual configuration of the XO-3 system, which contains a massive planet ($M_P=11.92^{+0.59}_{-0.63} M_J$) on a relatively eccentric ($e=0.2853^{+0.0027}_{-0.0026}$) and short-period ($3.19152 \pm 0.00145\,$day) orbit around a massive star ($M_*=1.219^{+0.090}_{-0.095} M_{\odot}$). Furthermore, we find no strong evidence for a temporal change of either $V\sin i_{*}$ (and by extension, the stellar spin vector of XO-3), or the transit profile (and thus orbital angular momentum vector of XO-3b). We conclude that the discrepancy in previous Rossiter-McLaughlin measurements ($70.0^{\circ} \pm 15.0^{\circ}$ (Hebrard et al. 2008); $37.3^{\circ} \pm 3.7^{\circ}$ (Winn et al. 2009); $37.3^{\circ} \pm 3.0^{\circ}$ (Hirano et al. 2011)) may have stemmed from systematic noise sources.
