Journal article
The impact of the first galaxies on cosmic dawn and reionization
JB Muñoz, Y Qin, A Mesinger, SG Murray, B Greig, C Mason
Monthly Notices of the Royal Astronomical Society | Published : 2022
Abstract
The formation of the first galaxies during cosmic dawn and reionization (at redshifts z = 5-30), triggered the last major phase transition of our universe, as hydrogen evolved from cold and neutral to hot and ionized. The 21-cm line of neutral hydrogen will soon allow us to map these cosmic milestones and study the galaxies that drove them. To aid in interpreting these observations, we upgrade the publicly available code 21cmFAST. We introduce a new, flexible parametrization of the additive feedback from: An inhomogeneous, H2-dissociating (Lyman-Werner; LW) background; and dark matter-baryon relative velocities; which recovers results from recent, small-scale hydrodynamical simulations with ..
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Grants
Awarded by Horizon 2020 Framework Programme
Funding Acknowledgements
We are grateful to Greg Bryan, Daniel Eisenstein, and Jordan Mirocha for enlightening discussions. JBM is supported by a Clay fellowship at the Smithsonian Astrophysical Observatory. AM acknowledges funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement No 638809 -AIDA). The results presented here reflect the authors' views; the ERC is not responsible for their use. Parts of this research were supported by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project number CE170100013. We gratefully acknowledge computational resources of the Center for High Performance Computing (CHPC) at Scuola Normale Superiore (SNS). This work was performed in part at the Aspen Center for Physics, which is supported by National Science Foundation grant PHY-1607611. This work was partially supported by a grant from the Simons Foundation. CAM acknowledges support by the VILLUM FONDEN under grant 37459 and from NASA Headquarters through the NASA Hubble Fellowship grant HST-HF251413.001. A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555.