主要内容:
从而以伽马暴为工具探测超高红移宇宙。
（因为红移越高，所观测的波段能量越低。所以要用X射线仪器）
精彩摘抄:
文章信息:
- · arXiv e-print (arXiv:1008.3054)
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| Title: |
| Probing the very high redshift Universe with Gamma-ray Bursts: prospects for observations with future X-ray instruments |
| Authors: |
| Campana, S.; Salvaterra, R.; Tagliaferri, G.; Kouveliotou, C.; Grindlay, J. |
| Publication: |
| eprint arXiv:1008.3054 |
| Publication Date: |
| 08/2010 |
| Origin: |
| ARXIV |
| Keywords: |
| Astrophysics - High Energy Astrophysical Phenomena |
| Comment: |
| Accepted for publication on MNRAS (1 figure, 3 tables) |
| Bibliographic Code: |
| 2010arXiv1008.3054C |
Abstract
Gamma-Ray Bursts (GRBs) are the most violent explosions in the Universe. Long duration GRBs are associated with the collapse of massive stars, rivaling their host galaxies in luminosity. The discovery of the most distant spectroscopically confirmed object in the Universe, GRB090423, opened a new window on the high redshift Universe, making it possible to study the cosmic 're-ionization' epoch and the preceding dark ages, as well as the generation of the first stars (Population III) using GRBs. Obviously this enables a wealth of new studies using the near infrared (nIR) characteristics of GRB afterglows. Here we explore a different path, focusing on the next generation of X-ray missions with large area focusing telescopes and fast repointing capabilities. We found that X-ray data can complement nIR observations and for the brightest GRBs can provide an accurate and independent redshift determination. Metallicity studies can also be carried out profitably once the redshift is known. Finally we discuss observational signatures of GRBs arising from Population III stars in the X-ray band.
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