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Evidence for the kSZ effect with ACTPol and BOSS: probing baryon physics in galaxy groups and clusters

Through the kinematic Sunyaev-Zel'dovich (kSZ) effect, the baryon momentum field is imprinted on the cosmic microwave background (CMB). Current small-scale high-sensitivity CMB experiments make this effect measurable, providing a unique handle on peculiar velocities and baryon physics. I will report significant evidence for the kSZ effect, obtained by combining CMB intensity data from ACTPol with peculiar velocities reconstructed from the galaxy number density field in BOSS. I will present the prospects for localizing the missing baryons and measuring cluster gas profiles from the kSZ effect, and discuss the various sources of systematic error associated.
 
Speaker: Emmanuel Schaan, Princeton

Monday, 03/14/16

Contact:

Website: Click to Visit

Cost:

Free

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Kavli Institute Astrophysics Colloquium

Varian Physics Building, Room 355
382 Via Pueblo Mall
 Stanford, CA 94305