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Unravelling the Dark Sector: Using Galactic Astrophysics to Probe Dark Sector Particle Physics
Unravelling the Dark Sector: Using Galactic Astrophysics to Probe Dark Sector Particle Physics
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104722
- ISBN
- 9798293894604
- DDC
- 530
- 저자명
- Roy, Sandip.
- 서명/저자
- Unravelling the Dark Sector: Using Galactic Astrophysics to Probe Dark Sector Particle Physics
- 발행사항
- [Sl] : Princeton University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 272 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
- 주기사항
- Advisor: Lisanti, Mariangela.
- 학위논문주기
- Thesis (Ph.D.)--Princeton University, 2025.
- 초록/해제
- 요약This thesis explores how astrophysical systems as large as galaxies and as compact as neutron stars can serve as laboratories for dark-sector particle physics. Part 1 investigates the galactic effects of atomic dark matter (ADM) which comprises a fraction of the total dark matter and is composed of dark electrons, dark protons, and dark photons, allowing the ADM to cool radiatively in galaxies in direct analogy to Standard Model baryons. ADM is implemented in high-resolution cosmological zoom-in simulations of Milky Way-mass and dwarf-mass galaxies for the first time. By varying the dark cooling rate, the simulations reveal that rapidly cooling ADM, comprising just 5% of the total dark matter, forms a rotationally supported dark gas disk which fragments into dark compact objects (clumps). ADM clumps dominate the inner galactic densities, significantly enhancing the central rotational velocities of the collisionless dark matter and the baryons. For extremely dissipative ADM within isolated dwarf galaxies, a simple two-parameter fit captures these inner-halo densities across a wide range of ADM parameter space, providing an opportunity to constrain rapid dark dissipation with observations. Part 2 focuses on ground-based and space-based telescope sensitivities to axion-like particles over a wide range of masses. Chapter 6 forecasts the end-of-mission sensitivity of the James Webb Space Telescope, showing that blank-sky observations of the Milky Way will probe axion-photon couplings down to gaγγ ≈ 5 x 10−12 GeV−1 for masses 0.18 eV ≲ ma ≲ 2.6 eV. Chapter 7 combines recent advances in magnetar magnetosphere modelling with state-of-the-art axion-photon ray-tracing simulations for the first time. The chapter demonstrates that the resonant conversion of axions to photons in the magnetospheres of magnetars can provide the leading sensitivities to axions in the mass range 10−5 eV ≲ ma ≲ 10−3 eV with existing and future ground-based radio telescopes. Overall, this thesis demonstrates that combining detailed modelling of galactic astrophysics over a variety of scales with dark matter particle theory can open up previously inaccessible regions of dark sector parameter space and guide future observational searches.
- 일반주제명
- Physics
- 일반주제명
- Statistics
- 일반주제명
- Astrophysics
- 일반주제명
- Particle physics
- 키워드
- Dark matter
- 키워드
- Data science
- 기타저자
- Princeton University Physics
- 기본자료저록
- Dissertations Abstracts International. 87-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■006m o d
■007cr#unu||||||||
■020 ▼a9798293894604
■035 ▼a(MiAaPQ)AAI32121592
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aRoy, Sandip.▼0(orcid)0000-0002-7638-7454
■24510▼aUnravelling the Dark Sector: Using Galactic Astrophysics to Probe Dark Sector Particle Physics
■260 ▼a[Sl]▼bPrinceton University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a272 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-04, Section: B.
■500 ▼aAdvisor: Lisanti, Mariangela.
■5021 ▼aThesis (Ph.D.)--Princeton University, 2025.
■520 ▼aThis thesis explores how astrophysical systems as large as galaxies and as compact as neutron stars can serve as laboratories for dark-sector particle physics. Part 1 investigates the galactic effects of atomic dark matter (ADM) which comprises a fraction of the total dark matter and is composed of dark electrons, dark protons, and dark photons, allowing the ADM to cool radiatively in galaxies in direct analogy to Standard Model baryons. ADM is implemented in high-resolution cosmological zoom-in simulations of Milky Way-mass and dwarf-mass galaxies for the first time. By varying the dark cooling rate, the simulations reveal that rapidly cooling ADM, comprising just 5% of the total dark matter, forms a rotationally supported dark gas disk which fragments into dark compact objects (clumps). ADM clumps dominate the inner galactic densities, significantly enhancing the central rotational velocities of the collisionless dark matter and the baryons. For extremely dissipative ADM within isolated dwarf galaxies, a simple two-parameter fit captures these inner-halo densities across a wide range of ADM parameter space, providing an opportunity to constrain rapid dark dissipation with observations. Part 2 focuses on ground-based and space-based telescope sensitivities to axion-like particles over a wide range of masses. Chapter 6 forecasts the end-of-mission sensitivity of the James Webb Space Telescope, showing that blank-sky observations of the Milky Way will probe axion-photon couplings down to gaγγ ≈ 5 x 10−12 GeV−1 for masses 0.18 eV ≲ ma ≲ 2.6 eV. Chapter 7 combines recent advances in magnetar magnetosphere modelling with state-of-the-art axion-photon ray-tracing simulations for the first time. The chapter demonstrates that the resonant conversion of axions to photons in the magnetospheres of magnetars can provide the leading sensitivities to axions in the mass range 10−5 eV ≲ ma ≲ 10−3 eV with existing and future ground-based radio telescopes. Overall, this thesis demonstrates that combining detailed modelling of galactic astrophysics over a variety of scales with dark matter particle theory can open up previously inaccessible regions of dark sector parameter space and guide future observational searches.
■590 ▼aSchool code: 0181.
■650 4▼aPhysics
■650 4▼aStatistics
■650 4▼aAstrophysics
■650 4▼aParticle physics
■653 ▼aDark matter
■653 ▼aData science
■653 ▼aAtomic dark matter
■653 ▼aDark-sector particle
■690 ▼a0605
■690 ▼a0596
■690 ▼a0798
■690 ▼a0463
■71020▼aPrinceton University▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g87-04B.
■790 ▼a0181
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358580▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
