论文标题
FRB 121102的环境以及与SGR/PSR J1745-2900的可能关系
The Environment of FRB 121102 and Possible Relation to SGR/PSR J1745-2900
论文作者
论文摘要
FRB 121102的分散体（DM）和旋转（RM）的变化表示磁场$ \ sim $ 3--17 mg在分散等离子体中。电子密度可能为$ \ sim 10^4 \，$ cm $^{ - 3} $。观察到的时间尺度$ \ sim 1 $年限制了等离子体云的大小。增加DM不包括涉及扩展的超新星残留物的简单模型，而非零RM不包括球形对称性。变化的DM和RM可能归因于等离子体进入或流出视线或变化的电子密度在较慢移动的等离子体中的运动。 FRB 121102的非常大的RM意味着环境，也可能是形成过程和来源，与其他FRB的环境不同。 SGR/PSR J1745-2900的可比RM可比且相当变化的RM表明它是FRB候选人。附录在“哥白尼原则”的背景下讨论了FRB 121102的年龄。
Variations of the dispersion (DM) and rotation (RM) measures of FRB 121102 indicate magnetic fields $\sim$ 3--17 mG in the dispersing plasma. The electron density may be $\sim 10^4\,$cm$^{-3}$. The observed time scales $\sim 1$ year constrain the size of the plasma cloud. Increasing DM excludes simple models involving an expanding supernova remnant, and the non-zero RM excludes spherical symmetry. The varying DM and RM may be attributable to the motion of plasma into or out of the line of sight or changing electron density within slower-moving plasma. The extraordinarily large RM of FRB 121102 implies an environment, and possibly also a formation process and source, qualitatively different from those of other FRB. The comparable and comparably varying RM of SGR/PSR J1745-2900 suggests it as an FRB candidate. An appendix discusses the age of FRB 121102 in the context of a "Copernican Principle".
