观察大爆炸后5亿年第一代星系之发光
发布时间：2019-07-16 08:47
【摘要】：正大爆炸后的38万年,宇宙从辐射为主转为进入以物质为主的时代.自由电子被质子俘获,形成中性氢原子,使得空间对电磁辐射变得透明.从此,直到大约3亿年后,空间几乎没有发光的恒星,以致于这期间被称为黑暗时代.按照现代天文学界的认识,在红移z=6—11的距离范围内,伴随着第一批恒星的形成,星际间的介质发生重新电离.最近,来自美国霍普金斯大学物理-天文系的Zheng等,在Nature周刊上撰文,报告
[Abstract]:380000 years after the Big Bang, the universe changed from radiation to material. Free electrons are captured by protons to form neutral hydrogen atoms, making space transparent to electromagnetic radiation. From then on, until about 300 million years later, there were few luminous stars in space, so that this period was called the Dark Age. According to the understanding of modern astronomy, the interstellar medium is reionized with the formation of the first stars in the range of red shift z 鈮，
本文编号：2514975
[Abstract]:380000 years after the Big Bang, the universe changed from radiation to material. Free electrons are captured by protons to form neutral hydrogen atoms, making space transparent to electromagnetic radiation. From then on, until about 300 million years later, there were few luminous stars in space, so that this period was called the Dark Age. According to the understanding of modern astronomy, the interstellar medium is reionized with the formation of the first stars in the range of red shift z 鈮，
本文编号：2514975
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