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名稱Title
2021天文年會
國立嘉義大學蘭潭校區
5月21日至23日

論文摘要

From peculiar motion to matter distribution of the universe

[ Poster ]

Minh Ngoc Le (NTHU, ASIAA), Teppei Okumura (ASIAA), Aniket Agrawal (ASIAA)

The gravitational interactions between matter in our universe cause the peculiar motion of dark matter halo, in other words, the motion of galaxy in that halo. In future redshift surveys, we will be able to measure the peculiar velocities of much more galaxies. By using the information from peculiar velocity - or more precisely - from the correlation function between the peculiar velocities, we can extract information about the mass distribution, growth rate and also the matter density of the universe. In this work, we use the open package "Corrfunc" to calculate the velocity-velocity correlation function between the halos and found that our simulation results and theory results do not fit each other on a very large scale. We are in the process to find the physical meaning behind that discrepancy.