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"The impact of baryons on the spins and shapes of dark matter haloes" Bryan et al. (2013)

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"The impact of baryons on the spins and shapes of dark matter haloes" Bryan et al. (2013)

Alan Duffy

Bryan et al. (2013)

Sarah and myself started investigating the shape and spin properties of Dark Matter haloes just after I left Jodrell Bank. This then increased in scope when she started to consider the actions of the baryons (as featured in Duffy et al 2010) in changing these key properties of the collapsed Dark Matter structures. This work showed that the baryons strongly influence the halo, making it more spherical and rotating faster than the Dark Matter only predictions. This is a key result for Gravitational lensing and X-ray temperature mass estimates. Reference: Bryan, Kay, Duffy, Schaye, Dalla Vecchia, Booth 2013 MNRAS 429 3316B.