The role of angular momentum in dark matter halo formation and evolution

Jie Li

doi:10.26182/xksh-r975

The role of angular momentum in dark matter halo formation and evolution

Jie Li

School of Physics, Mathematics and Computing

Research output: Thesis › Doctoral Thesis

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Abstract

Understanding of angular momentum (AM) of dark matter haloes can assist in comprehending the origin of the spin of galaxies. Hydrodynamical simulations have revealed that gas has a specific AM(sAM) 2-3 times higher than that of DM within virialised haloes. This challenges the common assumption that gas and DM share identical sAM in the theoretical framework. This thesis develops an ellipsoid collapse model that successfully elucidates the excess sAM of gas as a result of AM transfer from DM to gas. Furthermore, the study investigates major mergers to explain the variation of the sAM ratio between gas and DM.

Original language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Obreschkow, Danail, Supervisor Power, Chris, Supervisor Lagos Urbina, Claudia, Supervisor
Award date	5 Mar 2024
DOIs	https://doi.org/10.26182/xksh-r975
Publication status	Unpublished - 2023

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THESIS - DOCTOR OF PHILOSOPHY - LI Jie - 2023_
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Cite this

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title = "The role of angular momentum in dark matter halo formation and evolution",

abstract = "Understanding of angular momentum (AM) of dark matter haloes can assist in comprehending the origin of the spin of galaxies. Hydrodynamical simulations have revealed that gas has a specific AM(sAM) 2-3 times higher than that of DM within virialised haloes. This challenges the common assumption that gas and DM share identical sAM in the theoretical framework. This thesis develops an ellipsoid collapse model that successfully elucidates the excess sAM of gas as a result of AM transfer from DM to gas. Furthermore, the study investigates major mergers to explain the variation of the sAM ratio between gas and DM.",

keywords = "computational astrophysics, hydrodynamical simulation, galaxy formation and evolution",

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language = "English",

school = "The University of Western Australia",

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N2 - Understanding of angular momentum (AM) of dark matter haloes can assist in comprehending the origin of the spin of galaxies. Hydrodynamical simulations have revealed that gas has a specific AM(sAM) 2-3 times higher than that of DM within virialised haloes. This challenges the common assumption that gas and DM share identical sAM in the theoretical framework. This thesis develops an ellipsoid collapse model that successfully elucidates the excess sAM of gas as a result of AM transfer from DM to gas. Furthermore, the study investigates major mergers to explain the variation of the sAM ratio between gas and DM.

AB - Understanding of angular momentum (AM) of dark matter haloes can assist in comprehending the origin of the spin of galaxies. Hydrodynamical simulations have revealed that gas has a specific AM(sAM) 2-3 times higher than that of DM within virialised haloes. This challenges the common assumption that gas and DM share identical sAM in the theoretical framework. This thesis develops an ellipsoid collapse model that successfully elucidates the excess sAM of gas as a result of AM transfer from DM to gas. Furthermore, the study investigates major mergers to explain the variation of the sAM ratio between gas and DM.

KW - computational astrophysics

KW - hydrodynamical simulation

KW - galaxy formation and evolution

U2 - 10.26182/xksh-r975

DO - 10.26182/xksh-r975

M3 - Doctoral Thesis

ER -

The role of angular momentum in dark matter halo formation and evolution

Abstract

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