CCAPP Seminar: "DarkHistory: A Code for Computing Ionization and Thermal Histories with Dark Matter Energy Injection" Hongwan Liu (MIT)

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November 6, 2018
11:30AM - 12:30PM
Location
PRB 4138

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Add to Calendar 2018-11-06 11:30:00 2018-11-06 12:30:00 CCAPP Seminar: "DarkHistory: A Code for Computing Ionization and Thermal Histories with Dark Matter Energy Injection" Hongwan Liu (MIT) Measurements of the CMB and the 21-cm global signal can set significant constraints on dark matter annihilation or decay. To obtain such limits, a good understanding of how dark matter energy injection affects the ionization and thermal history of the universe is crucial. In this talk, I will present a new and open-source code package called DarkHistory, which will compute these histories efficiently and accurately. The code will fully account for both the non-instantaneous nature of energy deposition during the dark ages, and the back-reaction of increased ionization levels on energy deposition into the intergalactic medium, allowing DarkHistory to be used at the end of the cosmic dark ages and during the epoch of reionization. PRB 4138 Center for Cosmology and AstroParticle Physics (CCAPP) ccapp@osu.edu America/New_York public
Description

Measurements of the CMB and the 21-cm global signal can set significant constraints on dark matter annihilation or decay. To obtain such limits, a good understanding of how dark matter energy injection affects the ionization and thermal history of the universe is crucial. In this talk, I will present a new and open-source code package called DarkHistory, which will compute these histories efficiently and accurately. The code will fully account for both the non-instantaneous nature of energy deposition during the dark ages, and the back-reaction of increased ionization levels on energy deposition into the intergalactic medium, allowing DarkHistory to be used at the end of the cosmic dark ages and during the epoch of reionization.

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