发表机构
Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences; Department of Physics and Astronomy, Uppsala University; Keele University; Villanova University（尼古拉·哥白尼天文中心，波兰科学院; 乌普萨拉大学物理与天文学系; 基尔大学; 维拉诺瓦大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究利用TESS和多个光谱仪数据，精确测量分离食双星UX Men的质量、半径和温度，作为高精度基准，为恒星模型和PLATO任务提供校准。
AI 中文摘要
我们基于31个TESS扇区（约882天）以及来自HARPS、FEROS、CORALIE和UCLES的视向速度，为分离食双星UX Men呈现了超高精度的基本参数。光变曲线针对由恒星黑子引起的变率进行了去趋势处理，并分别使用JKTEBOP和ALLESFITTER独立建模，而视向速度则通过TODCOR提取，并用开普勒轨道进行拟合。光谱分离技术得到了各组分的独立光谱，并使用iSpec进行分析以确定有效温度（$T_{\rm eff}$）和金属丰度（$\mathrm{[M/H]}$）。多波段测光用于确定通量、通量比，并最终测量测光有效温度。我们获得了质量$M_{\rm A}$ = $1.2300 \pm{0.0012}$ M$_{\odot}$，$M_{\rm B}$ = $1.1946\pm{0.0012}$ M$_{\odot}$，以及半径$R_{\rm A}$ = $1.3605\pm{0.0031}$ R$_{\odot}$，$R_{\rm B}$ = $1.2801\pm{0.0069}$ R$_{\odot}$，精度优于百分之一。发现不确定性主要由来自（较弱的）恒星活动的系统效应主导。$T_{\rm eff,A}$ = $6302\pm{77}$，$T_{\rm eff,B}$ = $6292\pm65$，金属丰度估计为$[M/H]_{\rm A} = 0.02\pm{0.13}$ dex和$[M/H]_{\rm B}= 0.07\pm{0.10}$ dex。等时线拟合得出一致的年龄$\tau$ = $2.75\pm{0.13}$ Gyr。该系统在食计时变化中表现出约673天的周期性，可能由恒星活动引起，没有第三体的证据。结果独立于所使用的建模代码，但若不适当处理活动引起的系统效应，不确定性将被低估。UX Men是一个高精度基准双星系统，为恒星模型提供了严格的测试，并为PLATO提供了稳健的校准源。扩大经过充分表征的分离食双星样本将加强恒星物理学的经验基础以及未来测光任务的校准。
英文摘要
We present ultra-precise fundamental parameters for the detached eclipsing binary UX Men based on 31 TESS sectors ($\sim$882 d) and radial velocities from HARPS, FEROS, CORALIE, and UCLES. The light curves were detrended for spot-induced variability and modelled independently with JKTEBOP and ALLESFITTER, while radial velocities were extracted via TODCOR and fitted with a Keplerian orbit. Spectral disentangling yielded individual component spectra analysed with iSpec to determine $T_{\rm eff}$ and $\mathrm{[M/H]}$. Multi-band photometry was used to determine the fluxes, flux ratios and ultimately to measure photometric $T_{\rm eff}$. We obtain the masses $M_{\rm A}$ = $1.2300 \pm{0.0012}$ M$_{\odot}$, $M_{\rm B}$ = $1.1946\pm{0.0012}$ M$_{\odot}$ and radii $R_{\rm A}$ = $1.3605\pm{0.0031}$ R$_{\odot}$, $R_{\rm B}$ = $1.2801\pm{0.0069}$ R$_{\odot}$ with sub-percent precision. Uncertainties were found to be dominated by systematic effects coming from (weak) stellar activity. $T_{\rm eff,A}$ = $6302\pm{77}$, $T_{\rm eff,B}$ = $6292\pm65$ \& Metallicity estimates are $[M/H]_{\rm A} = 0.02\pm{0.13}$ dex and $[M/H]_{\rm B}= 0.07\pm{0.10}$ dex. Isochrone fitting yields a consistent age of $τ$ = $2.75\pm{0.13}$ Gyr. The system exhibits a $\sim$ 673-day periodicity in eclipse-timing variations, likely due to stellar activity, with no evidence for a third body. Results are independent of the modelling code used, but without proper treatment of activity-induced systematics the uncertainties would be underestimated. UX Men is a high-precision benchmark binary providing stringent tests of stellar models and a robust calibration source for PLATO. Expanding the sample of well-characterised detached eclipsing binaries will strengthen the empirical foundations for stellar physics and the calibration of future photometric missions
Comments19 pages and 12 figures. Accepted for publication in Astronomy & Astrophysics
