Journal article

Dark matter annihilation in the first galaxy haloes

S Schoen, KJ Mack, CA Avram, JSB Wyithe, E Barberio

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | OXFORD UNIV PRESS | Published : 2015

Abstract

We investigate the impact of energy released from self-annihilating dark matter (DM) on heating of gas in the small, high-redshift DM haloes thought to host the first stars. A super-symmetric (SUSY)-neutralino-like particle is implemented as our DM candidate. The PYTHIA code is used to model the final, stable particle distributions produced during the annihilation process. We use an analytic treatment in conjunction with the code MEDEA2 to find the energy transfer and subsequent partition into heating, ionizing and Lyman α photon components. We consider a number of halo density models, DM particle masses and annihilation channels. We find that the injected energy from DM exceeds the binding ..

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Grants

Funding Acknowledgements

We wish to thank Carmelo Evoli for access and assistance with the MEDEA code. We also thank the anonymous referee for their suggestions and input. KJM is supported by the Australian Research Council Discovery Early Career Research Award.