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Early Stage of Galaxy Formation

Y. Taniguchi·T. Nagao·M. Ajiki·Y. Shioya·S. S. Sasaki·T. Murayama
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Abstract

We discuss on the early stage of galaxy formation based on recent deep surveys for very high-redshift galaxies, mostly beyond redshift of 6. These galaxies are observed to be strong Lyman$α$ emitters, indicating bursts of massive star formation in them. The fraction of such star-forming system appears to increase with increasing redshift. On the other hand, the star formation rate density derived from Lyman$α$ emitters tends to decrease with increasing redshift. It is thus suggested that the major epoch of initial starbursts may occur around $z \sim$ 6 -- 7. In order to understand the early stage of galaxy formation, new surveys for galaxies beyond redshift of 7 will be important in near future.

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Y. Taniguchi, T. Nagao, M. Ajiki, Y. Shioya, S. S. Sasaki, T. Murayama. 2005-10-20. Early Stage of Galaxy Formation. https://arxiv.org/abs/astro-ph/0510601

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