Photodynamical analysis of the TOI-4504 system: Orbital precession brings planet d into transit revealing its deeply resonant state and similarity to GJ 876
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Posterior samples Posterior samples from the photodynamical modeling.Filename: TOI-4504_Almenara2026_posterior.csvColumns: G: N-body gravitational constant (au^3 day^-2 M_Sun^-1) Tref: Reference time for the orbital elements (BJD_TDB) timestep: N-body time step (days) coordinate: Coordinate system m_s: Star mass (M_Sun) r_s: Star radius (au) m_p: Planet mass (M_Sun) r_p: Planet radius (au) a_p: Planet's semimajor axis (au) e_p: Planet's eccentricity i_p: Planet's orbital inclination (degrees) w_p: Planet's argument of pericentre (degrees) Node_p: Planet's longitude of the ascending node (degrees) M_p: Planet's mean anomaly (degrees) 'p' is the planet number, ranging from 1 (the innermost planet) to 3 (the outermost planet): 1: TOI-4504 b 2: TOI-4504 d 3: TOI-4504 c Transit forecast Transit timing predictions derived from the photodynamical modeling.Filename: TOI-4504_Almenara2026_forecast2030.csvColumns: 1. Planet number (see the description of the posterior file) 2. Epoch number of the transit 3. Transit time (BJD_TDB) 4. Lower 68.3% credible interval (days) 5. Upper 68.3% credible interval (days) Light curves Transit observations of TOI-4504. Filename: TOI-4504_[Mid-transit UT date]_[Telescope]_[Band].txtColumns: 1. Mid-Exposure Time (BJD_TDB) 2. Normalized Flux 3. Normalized Flux Error 4. Exposure Time (seconds) Additional columns : point spread function centroid shifts (pixels), full width at half maximum (pixels), peak flux value (ADU), and airmass
后验样本 源自光动力建模的后验样本。文件名为:TOI-4504_Almenara2026_posterior.csv 列信息: G:N体引力常数(au³·日⁻²·M_Sun⁻¹) Tref:轨道元素参考时间(BJD_TDB) timestep:N体时间步长(日) coordinate:坐标系 m_s:恒星质量(M_Sun) r_s:恒星半径(au) m_p:行星质量(M_Sun) r_p:行星半径(au) a_p:行星半长轴(au) e_p:行星偏心率 i_p:行星轨道倾角(度) w_p:行星近心点幅角(度) Node_p:行星升交点黄经(度) M_p:行星平近点角(度) 其中p为行星编号,取值范围为1(最内侧行星)至3(最外侧行星):1号为TOI-4504 b,2号为TOI-4504 d,3号为TOI-4504 c 凌星预报 由光动力模型推导得到的凌星时刻预测结果。文件名为:TOI-4504_Almenara2026_forecast2030.csv 列信息: 1. 行星编号(详见后验样本文件说明) 2. 凌星事件历元编号 3. 凌星时刻(BJD_TDB) 4. 68.3%置信下限(日) 5. 68.3%置信上限(日) 光变曲线 TOI-4504的凌星观测数据。文件名为:TOI-4504_[凌星中点时刻UT日期]_[望远镜]_[波段].txt 列信息: 1. 曝光中点时刻(BJD_TDB) 2. 归一化流量 3. 归一化流量误差 4. 曝光时长(秒) 附加列:点扩散函数质心偏移(像素)、半高全宽(像素)、峰值流量值(ADU)以及大气质量(airmass)



