用高分辨率光谱学解析GRB主体的动力学和运动学
Unraveling the dynamics and kinematics of GRB hosts with high resolution spectroscopy
摘要：
在过去的几年里，对伽玛暴宿主星系的研究已经进行了更详细的研究，无论是使用高分辨率余辉光谱和附近宿主的空间分辨光谱。高分辨率光谱给出了物质沿宿主视线的运动学特性的详细图像。两个余辉光谱显示出明确的迹象流出从他们的主机，即GRB 030329和GRB 060206，来自吸收和主机发射线的位置，不变性的镁I和计算的精细结构线检测的辐射场。在附近的伽玛暴宿主中，可以解析实际的伽玛暴位置。GRB 060505是一个无SN的GRB，起源于一个相对贫金属的恒星形成区，与其他长持续时间的宿主具有相似的性质。对于GRB 980425/SN 1998 bw的站点也得到了类似的结论。
英文摘要：
In the last years the research on GRB host galaxies has proceeded to more detailed studies both using high resolution afterglow spectroscopy and spatially resolved spectra of nearby hosts. High resolution spectra give a detailed picture of the kinematic properties of matter along the line-of-sight in the host. Two afterglow spectra show clear indications for outflows from their host, namely GRB 030329 and GRB 060206, derived from the position of absorption and host emission lines, nonvariability of Mg I and the radiation field calculated from fine-structure line detections. In nearby GRB hosts it is possible to resolve the actual GRB site. GRB 060505, a SN-less GRB, originated in a relatively metal poor, star forming region with similar properties as other long-duration hosts. A similar conclusion is reached for the site of GRB 980425/SN 1998bw.
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