核心坍缩超新星中心黑洞超吸积在星系尺度上的贡献

核心坍缩超新星(Core-Collapse Supernova,CCSN)是大质量恒星演化末期的爆发现象,产生了宇宙中大多数的中子星和恒星级黑洞等致密天体.爆发可能伴随着强磁场中子星或黑洞超吸积引发的剧烈长时标伽马射线暴.CCSN还被认为是宇宙重元素的主要来源之一.本综述介绍了我们近期对CCSN中心黑洞超吸积过程的系列研究成果,主要包括研究了大质量星系中心附近伽马射线暴余辉阶段,因大量暗物质粒子湮灭电子注入而引发的光变和能谱的形态变化,探讨了其作为暗物质探测手段的可能性;研究了坍缩星框架下,中微子主导吸积流外流对核合成的贡献,及对太阳临近空间、(活动)星系等化学组分和演化的影响;最后,从数值模拟角度讨论了CCSN起源的致密天体质量分布,给出了低质量间隙可能起源于CCSN爆发能量分布的结论.

Galaxy-scale contributions of black hole hyperaccretions in the center of core-collapse supernovae

Core-collapse supernovae(CCSNe)are dramatic explosions of the massive stars at the end of their lives,which produce most of neutron stars and stellar-mass black holes in the Universe.The explosions might be associated with long-duration gamma-ray bursts originating from the black hole fallback hyperaccretions or neutron stars with strong magnetic fields.CCSNe are also considered to be one of the main factories of the heavy elements.In this review,I briefly introduce our recent work on the black hole hyperaccretions in the center of CCSNe.We studied the effects of dark matter annihilation on the shapes of the light curves and spectra in the gamma-ray burst afterglows near the galaxy centers,which might be considered as a possible detection method for dark matter.We also studied nucleosynthesis of the disk outflows from neutrino-dominated accretion flows in the collapsar scenario,and their contributions to the chemical components and evolutions of the solar neighborhood and(active)galaxies.Finally,we simulated the explosions of CCSNe and demonstrated that the distributions of the explosion energies might lead to the lower mass gap of compact remnants.