10–16 Jul 2016
ICISE
Asia/Ho_Chi_Minh timezone
XIIth Rencontres du Vietnam, ICISE, Quy Nhon, Vietnam

Axion as a cold dark matter candidate: fully relativistic and nonlinear analysis

12 Jul 2016, 15:55
20m
ICISE

ICISE

Quy Nhon, Vietnam
Dark Matter, Dark Energy, Astroparticle Parallel III

Speaker

Jai-chan Hwang

Description

We investigate aspects of axion as a coherently oscillating massive classical scalar field
by analyzing the fully nonlinear order perturbations in Einstein's gravity in the axion-comoving gauge.
The axion fluid has its characteristic pressure term leading to an axion Jeans scale
which is cosmologically negligible for a canonical axion mass.
Our classically derived axion pressure term in Einstein's gravity is identical to the one derived
in the non-relativistic quantum mechanical context in the literature.
We present the general relativistic energy and momentum conservation equations
for an axion fluid valid up to fully nonlinear order in perturbation.

Primary author

Co-authors

Prof. Chan-Gyung Park (Jeonbuk National University) Dr Hyerim Noh (Korea Astronomy and Space Science Institute)

Presentation materials

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