Feedback and its Feedback Effect on Feedback

Details Feedback and its Feedback Effect on Feedback Feedback and its Feedback Effect on Feedback

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc..990..418p&link_type=abstract

FIRST STARS III: First Stars II Conference. AIP Conference Proceedings, Volume 990, pp. 418-422 (2008).

Physics

Cosmology, Hii Regions, Emission And Reflection Nebulae, Intergalactic Matter, Quasar Absorption And Emission-Line Systems, Lyman Forest, Jets And Bursts, Galactic Winds And Fountains

Scientific paper

We show that radiative feedback due to reionization has a pronounced effect on the extent of mechanical feedback due to galactic outflows. The photoionization of the Intergalactic Medium (IGM) suppresses low-mass galaxy formation by photoheating the gas and limiting atomic line cooling. The number of low-mass galaxies is central for the enrichment of the IGM as these objects have the capacity to enrich a significant fraction (by volume) of the Universe. We use a modified version of our galactic outflow model, combined with a simple criterion for suppression, to investigate the potential impact upon the IGM. We find that this suppression strongly reduces the enrichment of the IGM and is sensitive to the reionization history.

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