标题： 星系周围的双黑洞并合分布 显示英文标题

标题： Distribution of binary mergers around galaxies

摘要： 我们使用一颗恒星双星群体综合码来找到几种可能的伽马射线暴前身的寿命和速度：双中子星、黑洞中子星、黑洞白矮星、氦星合并。 假设它们诞生于不同类型的星系中，我们计算了它们的空间分布，并将其与伽马射线暴余辉在其宿主星系中的观测位置进行了比较。 我们讨论了由这种比较施加给伽马射线暴紧凑物体合并模型的限制，并发现余辉及其宿主星系的观测似乎与伽马射线暴紧凑物体合并模型不一致。 显示英文摘要

摘要： We use a stellar binary population synthesis code to find the lifetimes and velocities of several types of possible GRB progenitors: double neutron stars, black hole neutron stars, black hole white dwarfs, helium star mergers. Assuming that they are born in different types of galaxies we compute their spatial distribution and compare it with the observed locations of GRB afterglows within their hosts. We discuss constraints on the compact object merger model of GRBs imposed by this comparison and find that the observations of afterglows and their host galaxies appear inconsistent with the GRB compact object merger model.