标题： 寻找伽马射线暴的起源 显示英文标题

标题： Looking for GRB progenitors

摘要： 使用星族双星星族综合代码，我们计算了几种可能的伽马射线暴（GRB）前身星的产生率和寿命。 我们考虑了双中子星、黑洞中子星、黑洞白矮星的并合以及氦星并合。 我们用测量得到的恒星形成历史对结果进行了校准。 我们讨论了每种GRB模型的可行性，并且假设所有暴发都与一个模型相关联，从而限制了GRB所需的聚束程度。 我们还展示了广泛使用的演化参数对计算得到的双星群体并合率的重要性。 显示英文摘要

摘要： Using stellar binary population synthesis code we calculate the production rates and lifetimes of several types of possible GRB progenitors. We consider mergers of double neutron stars, black hole neutron stars, black hole white dwarfs and helium star mergers. We calibrate the results with the measured star formation rate history. We discuss the viability of each GRB model, and alternatively assuming that all bursts are connected with one model we constrain the required collimation of GRBs. We also show the importance of widely used evolutionary parameters on the merger rates of calculated binary populations.