Karpiuk Tomasz, Nikołajuk Marek, Gajda Mariusz, Brewczyk Mirosław
Faculty of Physics, University of Białystok, Ciołkowskiego 1L, 15-245, Białystok, Poland.
Institute of Physics, Polish Academy of Sciences, Aleja Lotników 32/46, 02-668, Warsaw, Poland.
Sci Rep. 2021 Jan 27;11(1):2286. doi: 10.1038/s41598-021-81707-5.
We study the final stages of the evolution of a binary system consisted of a black hole and a white dwarf star. We implement the quantum hydrodynamic equations and carry out numerical simulations. As a model of a white dwarf star we consider a zero temperature droplet of attractively interacting degenerate atomic bosons and spin-polarized atomic fermions. Such mixtures are investigated experimentally nowadays. We find that the white dwarf star is stripped off its mass while passing the periastron. Due to nonlinear effects, the accretion disk originated from the white dwarf becomes fragmented and the onset of a quantum turbulence with giant quantized vortices present in the bosonic component of the accretion disk is observed. The binary system ends its life in a spectacular way, revealing quantum features underlying the white dwarf star's structure. We find a charged mass, falling onto a black hole, could be responsible for recently discovered ultraluminous X-ray bursts. The simulations show that final passage of a white dwarf near a black hole can cause a gamma-ray burst.
我们研究了由一个黑洞和一颗白矮星组成的双星系统演化的最后阶段。我们求解了量子流体动力学方程并进行了数值模拟。作为白矮星的一个模型，我们考虑了一个由相互吸引的简并原子玻色子和自旋极化原子费米子组成的零温度液滴。如今这类混合物正在进行实验研究。我们发现白矮星在经过近日点时会被剥离其质量。由于非线性效应，源自白矮星的吸积盘会破碎，并且在吸积盘的玻色子成分中会出现带有巨大量子化涡旋的量子湍流。这个双星系统以一种壮观的方式结束其生命，揭示了白矮星结构背后的量子特征。我们发现，落入黑洞的带电物质可能是最近发现的超亮X射线爆发的原因。模拟结果表明，白矮星在黑洞附近的最后一次通过可能会引发伽马射线爆发。
