Feb 7 – 9, 2017
Radisson Hotel Lansing
US/Eastern timezone

Chemical Enrichment from the First Stars and Galaxies

Feb 8, 2017, 1:30 PM
30m
Radisson Hotel Lansing

Radisson Hotel Lansing

111 N Grand Ave, Lansing, MI 48933
Talk [Main Conference] Invited talk Session 7

Speaker

Prof. John Wise (Georgia Institute of Technology)

Description

I review recent results from galaxy simulations that particularly focus on the epoch of reionization. In this talk, I pay special attention to the transition from metal-free Population III stars to the formation of the first galaxies and what type of chemical imprint they might have on these small galaxies. We have investigated the variations in galaxy properties when changing various parameters in our star formation and feedback modeling. One constant result from all the simulations is a metallicity floor between [Z/H] = -3 to -4. We show that an accurate treatment of feedback, especially from ionizing radiation, plays an important role in providing turbulent support and mixing metals, preventing the overproduction of stars and metals. This results in a stellar population with a tight metallicity distribution function centered at [Z/H] = -2, in agreement with the observed luminosity-metallicity relation in dwarf galaxies.

Primary author

Prof. John Wise (Georgia Institute of Technology)

Presentation materials

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