@article{18725,
  abstract     = {In hierarchical models of structure formation, an early cosmic UV background(UVB) is produced by the small (T vir ≲ 104K) halos that collapse before cosmological reionization. If the sources in the first collapsed halos are stars, then their UV flux below 13.6 eV photo-dissociates the molecular hydrogen H2 in subsequently collapsing halos and causes a pause in the cosmic star-formation history. The buildup of the UVB, and reionization is delayed until larger halos (T vir ≳ 104K) collapse. In contrast, if the small halos host mini-quasars with hard spectra extending to∼1keV, then their X-rays balance the effects of the UVB, the negative feedback does not occur, and reionization can be caused early on by the small halos.},
  author       = {Haiman, Zoltán},
  issn         = {1572-946X},
  journal      = {Astrophysics and Space Science},
  pages        = {191--199},
  publisher    = {Springer Nature},
  title        = {{Radiative feedback from the first objects and the end of the cosmological dark age}},
  doi          = {10.1023/a:1017062512507},
  volume       = {269},
  year         = {1999},
}