论文标题
他的白色矮人在黯然失色的二进制文件中。 I.黄蜂0131+28
The Pre-He White Dwarfs in Eclipsing Binaries. I. WASP 0131+28
论文作者
论文摘要
我们报告了后质量转移二元星黄蜂0131+28的第一个$ bv $光曲线和高分辨率光谱，以研究极低的质量白矮人的绝对性质。从观察到的光谱中，得出了双线径向速度，并发现更明亮，更大的主要的有效温度和旋转速度为$ t _ {\ rm eff，1} = 10,000 \ pm 200 $ k和$ v_1 $ v_1 \ sin $ $ = 55 $ = 55 $ = 55 $ = 55 $ \ pm $ 10 km $ 10 km s $ s $^$^$ 1} $ 1} $ 1} $ 1}。 {\ it Tess}归档数据和我们的组合分析得出了程序目标的准确基本参数。质量的准确性约为1.0 \％，半径为0.6 \％，或更高。二级组件的参数为$ m_2 = 0.200 \ pm 0.002 $ m $ _ \ odot $，$ r_2 = 0.528 \ pm 0.003 $ r $ $ _ \ odot $，$ t _ {\ rm f，2} $ = 11,186美元与质量为0.203 m $ _ \ odot $的氦核白矮人的进化顺序一致，并表明该恒星已贯穿恒定光度阶段的一半。本文介绍的结果表明，WASP 0131+28是薄磁盘中的El CVN黯然失色的二进制，该二进制是由稳定的Roche-Lobe溢流通道形成的，由光谱A0和Pre-He Pre-He-He-He-He-He-He-He-He-He。
We report the first $BV$ light curves and high-resolution spectra of the post-mass transfer binary star WASP 0131+28 to study the absolute properties of extremely low-mass white dwarfs. From the observed spectra, the double-lined radial velocities were derived, and the effective temperature and rotational velocity of the brighter, more massive primary were found to be $T_{\rm eff,1} = 10,000 \pm 200$ K and $v_1\sin$$i$ = 55 $\pm$ 10 km s$^{-1}$, respectively. The combined analysis of the {\it TESS} archive data and ours yielded the accurate fundamental parameters of the program target. The masses were derived to about 1.0 \% accuracy and the radii to 0.6 \%, or better. The secondary component's parameters of $M_2 = 0.200 \pm 0.002$ M$_\odot$, $R_2 = 0.528 \pm 0.003$ R$_\odot$, $T_{\rm eff,2}$ = 11,186 $\pm$ 235 K, and $L_2 = 3.9 \pm 0.3$ L$_\odot$ are in excellent agreement with the evolutionary sequence for a helium-core white dwarf of mass 0.203 M$_\odot$, and indicates that this star is halfway through the constant luminosity phase. The results presented in this article demonstrate that WASP 0131+28 is an EL CVn eclipsing binary in a thin disk, which is formed from the stable Roche-lobe overflow channel and composed of a main-sequence dwarf with a spectral type A0 and a pre-He white dwarf.
