Does Radiative Feedback by the First Stars Promote or Prevent Second Generation Star Formation?

Details Does Radiative Feedback by the First Stars Promote or Prevent Second Generation Star Formation? Does Radiative Feedback by the First Stars Promote or Prevent Second Generation Star Formation?

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc..990..377a&link_type=abstract

FIRST STARS III: First Stars II Conference. AIP Conference Proceedings, Volume 990, pp. 377-380 (2008).

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Star Formation, Population Iii Stars, Radiative Transfer, Scattering, Intergalactic Matter, Quasar Absorption And Emission-Line Systems, Lyman Forest, Superclusters, Large-Scale Structure Of The Universe, Galactic Halo

Scientific paper

We present a self-consistent study of formation of Pop III stars in the early stage of cosmic reionization. We study the effect of starlight from the first stars on the ability of other minihalos in their neighborhood to form additional stars. We show that the ionization front (I-front) is trapped by the neighboring minihalos, after it is transformed from R-type to D-type and preceded by a shock front. The fate of the core of nearby minihalos is mostly determined by the response of the core to this shock front, which leads to molecular cooling and collapse that, when compared to the same halo without external radiation, is (a) expedited, (b) delayed, (c) unaltered, or (d) reversed and prevented, depending upon the flux and halo mass and evolutionary stage. Roughly speaking, most halos that were destined to cool, collapse and form stars in the absence of external radiation are found to do so even when exposed to the first Pop III star in their neighborhood, while those that would not have done so are still not able to.

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