The red damping wing of Gunn-Peterson trough in the high redshift GRBs  

作　　者：XU Zhou1,2 & WEI DaMing1,3 1 Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China 2 Graduate University of Chinese Academy of Sciences, Beijing 100012, China 3 Joint Center for Particle Nuclear Physics and Cosmology of Purple Mountain Observatory-Nanjing University, Nanjing 210008, China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2009年第9期1428-1433,共6页中国科学：物理学、力学、天文学（英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 10673034 and 10621303);the National Basic Research Program of China (Grant No. 2007CB815404)

摘　　要：We calculate the red damping wing of Gunn-Peterson trough taking the evolution of the neutral fraction into consideration and take a clear look at the ionized region around the ionizing sources. We get the result that the damping wing flux feature is mainly determined by the neutral hydrogen outside the ionized bubble and the cut off in the damping wing would be useful to get the size of the ionized bubble. We also fit the red damping wing of the recently discovered high redshift GRB080913 and find that the ionized bubble is too small to create apparent cut off in the spectrum of this burst.We calculate the red damping wing of Gunn-Peterson trough taking the evolution of the neutral fraction into consideration and take a clear look at the ionized region around the ionizing sources. We get the result that the damping wing flux feature is mainly determined by the neutral hydrogen outside the ionized bubble and the cut off in the damping wing would be useful to get the size of the ionized bubble. We also fit the red damping wing of the recently discovered high redshift GRB080913 and find that the ionized bubble is too small to create apparent cut off in the spectrum of this burst.

关 键 词：COSMOLOGY theory intergalactic medium gamma RAY BURST 

分 类 号：P172.4[天文地球—天文学]