Local Group Dwarf Galaxies and the Star Formation Law at High Redshift

Details Local Group Dwarf Galaxies and the Star Formation Law at High Redshift Local Group Dwarf Galaxies and the Star Formation Law at High Redshift

2000-04-13

arxiv.org/abs/astro-ph/0004189v1

Astronomy and Astrophysics

Astrophysics

accepted for publication in ApJ Letters

Scientific paper

10.1086/312708

I show how the existing observational data on Local Group dwarf galaxies can be used to estimate the average star formation law during the first 3 Gyr of the history of the universe. I find that the observational data are consistent with the orthodox Schmidt law with a star formation efficiency of about 4 percent if the star formation is continuous (during the first 3 Gyr). The efficiency is proportionally higher if most of the gas in the dwarfs was consumed (and never replenished) in a short time interval well before the universe turned 3 Gyr.

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