# GPPU Seminar

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*Elementary Introduction to Cosmology and Hubble constant Problem
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Part 2: Cosmological parameters in homogenous isotropic cosmology

Part 2: Cosmological parameters in homogenous isotropic cosmology

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Toshifumi Futamase

(Kyoto Sangyo University, Department of Astrophysics and Atmospheric Sciences)

### Date

14:00-16:00, March 30th, 2020### Place

Room N204, Science Complex C (H-04)*** We strongly recommend you to attend the seminar over “zoom”, a video conference tool. To join the meeting, please click**

(9:30-) https://zoom.us/j/814109182map

(9:30-) https://zoom.us/j/814109182

### Abstract

The Hubble constant which measures the expansion rate of the universe is the most important parameter in Cosmology. Therefore the Hubble constant has been measured by various kind of observations various observations. With new methods and technology, the accuracy of the measurement has improved, but a non-negligible discrepancy between locally measured value and globally measured value has arisen. This is called Hubble constant tension.

In this lecture we start the elementary introduction of cosmology in order to understand the Hubble constant and then provide a possible solution to the problem using the observed inhomogeneous matter distribution in the universe.

### Point

**GASP 1**

Contact: Yusuke Tanimura (tanimura [at] nucl.phys.tohoku.ac.jp)