HII Bubble Growth during Reionization

Details HII Bubble Growth during Reionization HII Bubble Growth during Reionization

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc..990..450s&link_type=abstract

FIRST STARS III: First Stars II Conference. AIP Conference Proceedings, Volume 990, pp. 450-452 (2008).

Mathematics

Logic

Population Iii Stars, Cosmology, Hii Regions, Emission And Reflection Nebulae, Population Ii Stars, Background Radiations

Scientific paper

We investigate the growth of cosmological HII bubbles during reionization based on a cosmological radiative transfer simulation. We find that the number distribution of bubble volume has a maximum at ~0.6 Mpc3/h3. Population III stars are as important as Population II stars in producing ionizing photons However, at z<=8, Population II stars become a dominant source of ionizing photons. We also find that the clustering of dark matter halos is a main factor to determine the size of large HII bubbles. For small bubbles, Population III stars provide most of ionizing photons. These highly-biased HII bubbles result in a strong non-gaussianity in the HII field.

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