자료유형  

 학위논문

Control Number  

0017165024

International Standard Book Number  

9798384462385

Dewey Decimal Classification Number  

523

Main Entry-Personal Name  

Zeng, Zhichao Carton.

Publication, Distribution, etc. (Imprint  

[S.l.] : The Ohio State University., 2024

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2024

Physical Description  

275 p.

General Note  

Source: Dissertations Abstracts International, Volume: 86-04, Section: B.

General Note  

Advisor: Peter, Annika.

Dissertation Note  

Thesis (Ph.D.)--The Ohio State University, 2024.

Summary, Etc.  

요약Self-interacting dark matter (SIDM) cosmologies admit an enormous diversity of dark matter (DM) halo density profiles, from low-density cores to high-density core-collapsed cusps. The possibility of the growth of high central density in low-mass halos, accelerated if halos are subhalos of larger systems, has intriguing consequences for small-scale observables such as substructure lensing, dwarf galaxies and stellar streams. However, following the evolution of low-mass subhalos in their host systems is computationally expensive, sometimes even prohibitive, with traditional N-body cosmological simulations. In this thesis work, we are thus motivated to develop a series of hybrid methods for simulations of low-mass subhalos, from core-creation to core-collapse (or complete dissolution in the host), also with the orbital effects from the host halo consistently captured. This thesis consists of three parts: in the first chapter, we detail our hybrid method tracing individual SIDM subhalos; in the second chapter, we use the hybrid method to simulate a realistic population of subhalos, also with a new hierarchical framework to further reduce the computational cost; in the third chapter, we populate individual SIDM subhalos with galaxies in the initial condition, and study the evolution of stellar properties in response to SIDM halo evolution and orbital effects.

Subject Added Entry-Topical Term  

Astrophysics.

Subject Added Entry-Topical Term  

Physics.

Subject Added Entry-Topical Term  

Applied physics.

Index Term-Uncontrolled  

Dark matter

Index Term-Uncontrolled  

Dwarf galaxy diversity

Index Term-Uncontrolled  

Substructure lensing

Index Term-Uncontrolled  

N-body simulation

Added Entry-Corporate Name  

The Ohio State University Physics

Host Item Entry  

Dissertations Abstracts International. 86-04B.

Electronic Location and Access  

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Control Number  

joongbu:658510