In this project we study kSZ(kinematic Sunyaev–Zel'dovich) effect by cross correlate galaxy catalogs with tSZ-free CMB map. Based on that, we try to place constraints on the tension over Hubble constant if we live inside of a underdensed "local void", and hopefully, give hints to rule out that "local bubble theory".

Data part: SuperCosmos galaxy catalog X CMB

Theory part: Predict galaxy X CMB cross correlation function base on "local void" theories. i.e. we lives in a underdensed part of the universe.

Purpose: Compare data and theory to add some discussion on the on-going hot debate over Hubble constant tension. (Against local void)

Supervisor: Prof. Gilbert Holder

This is project a almost done! We are formulating words for the Paper.

My first paper! Hooray!

All y-errorbars are 2 sigmas