论文标题
在黯淡的二进制中脉动的白矮人
A pulsating white dwarf in an eclipsing binary
论文作者
论文摘要
白色矮人是阳光恒星的燃烧的核心，是我们银河系中97％的全恒星的最后命运。白矮人的内部结构和组成被其高重力所掩盖，这会导致所有元素（除最轻的元素）中脱离大气。详细探讨恒星和白色矮人内部结构的最直接方法是通过星形学。在这里，我们介绍了在黯然失色的二进制系统中的第一个已知的脉动白矮人，使我们能够从光曲线上对白色矮人的质量和半径非常精确地约束，而与脉动无关。这个0.325亿美元$ _ \ odot $白色矮人--- SDSS J115219.99+024814.4的一位成员将作为一个有力的基准，以限制低质量恒星残余物的核心组成，并研究密切的二元进化对白色矮人内部结构的影响。
White dwarfs are the burnt out cores of Sun-like stars and are the final fate of 97% of all stars in our Galaxy. The internal structure and composition of white dwarfs are hidden by their high gravities, which causes all elements, apart from the lightest ones, to settle out of their atmospheres. The most direct method to probe the inner structure of stars and white dwarfs in detail is via asteroseismology. Here we present the first known pulsating white dwarf in an eclipsing binary system, enabling us to place extremely precise constraints on the mass and radius of the white dwarf from the light curve, independent of the pulsations. This 0.325M$_\odot$ white dwarf --- one member of SDSS J115219.99+024814.4 --- will serve as a powerful benchmark to constrain empirically the core composition of low-mass stellar remnants and investigate the effects of close binary evolution on the internal structure of white dwarfs.
