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Faint Galaxies and Small Halos: Probes of Galaxy Formation and Dark Matter.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Faint Galaxies and Small Halos: Probes of Galaxy Formation and Dark Matter./
作者:	Nadler, Ethan Oliver.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	357 p.
附註:	Source: Dissertations Abstracts International, Volume: 83-05, Section: B.
Contained By:	Dissertations Abstracts International83-05B.
標題:	Stars & galaxies. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28688394
ISBN:	9798544204190

Faint Galaxies and Small Halos: Probes of Galaxy Formation and Dark Matter.
Nadler, Ethan Oliver.

Faint Galaxies and Small Halos: Probes of Galaxy Formation and Dark Matter. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 357 p.

Source: Dissertations Abstracts International, Volume: 83-05, Section: B.

Thesis (Ph.D.)--Stanford University, 2021.

This item must not be sold to any third party vendors.

Our best scientific model of the Universe on large scales-ΛCDM cosmology-predicts that most of the matter in the cosmos is dark. Without this gravitating substance, known as cold dark matter (CDM), the cosmic structures we inhabit including galaxies, stars, and planets would never form.ACDM cosmology does not hold the same status as physical theories like general relativity and quantum mechanics because it is descriptive. This is highlighted by its two building blocks: dark matter and dark energy. In particular, the CDM particle is assumed to be cold (i.e., to move slowly on cosmological scales) and to have feeble-if any-non-gravitational interactions with both itself and Standard Model particles. This begs the question: how cold and how feebly interacting is dark matter?The modern picture of galaxy formation in the ΛCDM context also sows its own foundational questions. A vast and compelling body of evidence teaches us that galaxies live in dark matter halos, and that more massive halos tend to host brighter galaxies. Open questions remain at the limits of these generic statements: What is the smallest galaxy that can form? Does every dark matter halo host a galaxy? And, are the answers to these questions influenced by non-gravitational dark matter physics, or only by astrophysical processes?This thesis addresses the intersection of dark matter and galaxy formation physics by modeling the faintest galaxies in the Universe in a cosmological context. In the first part of this work, I present an empirical model for the connection between faint galaxies and small dark matter halos. Combining this model with tailored cosmological simulations of Milky Way analogs and state-of-the-art satellite galaxy observations yields new insights into dwarf galaxy formation and hierarchical structure formation. Next, I show that these same dwarf galaxy observations place stringent constraints on microphysical dark matter properties including its warmth, self-interactions, Standard Model interactions, minimum particle mass, and formation epoch. Finally, I describe a unified framework that combines dark matter constraints from dwarf galaxies and strong gravitational lensing, paving the way for next-generation surveys of small-scale cosmic structure to deliver unprecedented insights into dark matter physics.. Finally, Chapter 12 discusses the outlook for these upcoming surveys and Chapter 13 concludes.

ISBN: 9798544204190Subjects--Topical Terms:

3683661
Stars & galaxies.

Faint Galaxies and Small Halos: Probes of Galaxy Formation and Dark Matter.
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520 $a Our best scientific model of the Universe on large scales-ΛCDM cosmology-predicts that most of the matter in the cosmos is dark. Without this gravitating substance, known as cold dark matter (CDM), the cosmic structures we inhabit including galaxies, stars, and planets would never form.ACDM cosmology does not hold the same status as physical theories like general relativity and quantum mechanics because it is descriptive. This is highlighted by its two building blocks: dark matter and dark energy. In particular, the CDM particle is assumed to be cold (i.e., to move slowly on cosmological scales) and to have feeble-if any-non-gravitational interactions with both itself and Standard Model particles. This begs the question: how cold and how feebly interacting is dark matter?The modern picture of galaxy formation in the ΛCDM context also sows its own foundational questions. A vast and compelling body of evidence teaches us that galaxies live in dark matter halos, and that more massive halos tend to host brighter galaxies. Open questions remain at the limits of these generic statements: What is the smallest galaxy that can form? Does every dark matter halo host a galaxy? And, are the answers to these questions influenced by non-gravitational dark matter physics, or only by astrophysical processes?This thesis addresses the intersection of dark matter and galaxy formation physics by modeling the faintest galaxies in the Universe in a cosmological context. In the first part of this work, I present an empirical model for the connection between faint galaxies and small dark matter halos. Combining this model with tailored cosmological simulations of Milky Way analogs and state-of-the-art satellite galaxy observations yields new insights into dwarf galaxy formation and hierarchical structure formation. Next, I show that these same dwarf galaxy observations place stringent constraints on microphysical dark matter properties including its warmth, self-interactions, Standard Model interactions, minimum particle mass, and formation epoch. Finally, I describe a unified framework that combines dark matter constraints from dwarf galaxies and strong gravitational lensing, paving the way for next-generation surveys of small-scale cosmic structure to deliver unprecedented insights into dark matter physics.. Finally, Chapter 12 discusses the outlook for these upcoming surveys and Chapter 13 concludes.
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