Conveners
Session 7: Wednesday
- Hayley Macpherson (University of Chicago)
Peculiar velocities surveys are going to play a key role in testing our knowledge about the nearby universe and our cosmological assumptions. In this talk, I will review what peculiar velocities are and some recent fundings and analysis that I have been developed concerning these novel observables. In particular, I will focus on the information we can extrapolate about peculiar velocities from...
In this talk I will look at some theoretical details of peculiar velocities. We’ll explore different ways that peculiar velocities can be measured and corrected for. We’ll discuss what it means to say “space is expanding” and answer the question of whether it is possible to have a galaxy “at rest” with respect to us if it is beyond the Hubble sphere (which is similar to asking whether a...
There is an analogy between terrestrial and cosmic watersheds, and river networks. A terrestrial (usual) watershed is a patch of land where water all flows into the same river. Cosmic watersheds gather matter into the cosmic web of walls and filaments, all flowing inward toward galaxies. How good is that analogy? One quantitative way to investigate this question is through a "cosmic...
