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Xiaoju Xu (CWRU)

Date: Tue. September 22nd, 2020, 11:30 am-12:30 pm

Halo and galaxy assembly bias

Measuring galaxy clustering is an effective way to gain knowledge of galaxy formation and constraining cosmology. Cosmology determines dark matter halo population and clustering, and halo clustering and halo occupation determine the galaxy clustering. It is important to understand halo clustering and galaxy-halo connection to build halo occupation models. In N-body simulations, halo clustering is shown to depend not only on halo mass but also on secondary halo properties, which is called the halo assembly bias. However, traditional halo occupation models only consider halo mass dependence and ignore effects caused by secondary halo properties. This may cause systematics in constraining galaxy-halo relations and cosmology. We modify the traditional halo occupation model to include the secondary effect. This would be useful in constraining the galaxy-halo relation in the real Universe.

Zoom meeting ID:  999 3023 4812
For the password to access the meeting please contact one of us:
Kurt Hinterbichler: kjh92
Alexis Plascencia: adp110
Ellen Rabe: exr223
Idit Zehavi: ixz6

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