Early Stage of Galaxy Formation

Details Early Stage of Galaxy Formation Early Stage of Galaxy Formation

2005-10-20

arxiv.org/abs/astro-ph/0510601v1

Astronomy and Astrophysics

Astrophysics

4 pages with 1 table, Invited Review Talk presented at IAU The 9th Asian Pacific Regional Meeting

Scientific paper

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$\alpha$ 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$\alpha$ 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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