论文标题
WASP-4过境时机从一组综合的129次转移到
WASP-4 transit timing variation from a comprehensive set of 129 transits
论文作者
论文摘要
我们同质地重新分析了WASP-4 B热木星的$ 124 $ Transit Light曲线。 This set involved new observations secured in 2019 and nearly all observations mentioned in the literature, including high-accuracy GEMINI/GMOS transmission spectroscopy of 2011-2014 and TESS observations of 2018. The analysis confirmed a nonlinear TTV trend with $P/|\dot P|\sim (17-30)$ Myr (1-sigma range), implying only half of the initial decay rate estimation.趋势意义至少为$ 3.4 $ - 柔和的保守治疗。在涵盖2007 - 2014年七年的多普勒数据中未透露由于看不见的同伴而引起的径向加速，并且未确认另一支球队最近在最近的预印本中报告的$ -15 $ M S $^{ - 1} $ yr $^{ - 1} $的径向加速度。如果存在，它是非常非线性的RV变化。假设整个TTV本质上都是潮汐，那么潮汐质量因子$ q_ \ star'\ sim（4.5-8.5）\ cdot 10^4 $并没有表现出与可用理论预测的令人信服的分歧。
We homogeneously reanalyse $124$ transit light curves for the WASP-4 b hot Jupiter. This set involved new observations secured in 2019 and nearly all observations mentioned in the literature, including high-accuracy GEMINI/GMOS transmission spectroscopy of 2011-2014 and TESS observations of 2018. The analysis confirmed a nonlinear TTV trend with $P/|\dot P|\sim (17-30)$ Myr (1-sigma range), implying only half of the initial decay rate estimation. The trend significance is at least $3.4$-sigma in the agressively conservative treatment. Possible radial acceleration due to unseen companions is not revealed in Doppler data covering seven years 2007-2014, and radial acceleration of $-15$ m s$^{-1}$yr$^{-1}$ reported in a recent preprint by another team is not confirmed. If present, it is a very nonlinear RV variation. Assuming that the entire TTV is tidal in nature, the tidal quality factor $Q_\star'\sim (4.5-8.5)\cdot 10^4$ does not reveal a convincing disagreement with available theory predictions.
