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Magnetized Turbulence in Multiphase Interstellar Media: Measurement of Turbulence, Interstellar Magnetic-Field, and Impact to Phase Structure
Magnetized Turbulence in Multiphase Interstellar Media: Measurement of Turbulence, Interstellar Magnetic-Field, and Impact to Phase Structure
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104839
- ISBN
- 9798290944982
- DDC
- 551.5
- 저자명
- Ho, Ka Wai.
- 서명/저자
- Magnetized Turbulence in Multiphase Interstellar Media: Measurement of Turbulence, Interstellar Magnetic-Field, and Impact to Phase Structure
- 발행사항
- [Sl] : The University of Wisconsin - Madison, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 207 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
- 주기사항
- Advisor: Lazarian, Alexandre.
- 학위논문주기
- Thesis (Ph.D.)--The University of Wisconsin - Madison, 2025.
- 초록/해제
- 요약Turbulence is ubiquitous in the interstellar medium (ISM) and strongly influenced by magnetic fields. Understanding the interaction between magnetized turbulence and the multiphase ISM remains a central question in astrophysics. This thesis addresses these interactions through magnetohydrodynamic (MHD) turbulence theory, numerical simulations, and comparisons with observations. Additionally, We will discuss new two techniques - the Velocity Decomposition Algorithm (VDA) and the Gradient Technique (GT) - to infer turbulent velocity information and probe the magnetic field from the observation. The thesis will also discuss how that strong turbulence stabilizes the Unstable Neutral Medium (UNM), significantly extending its lifetime and increasing its mass fraction. This stabilization impacts the morphology of the Cold Neutral Medium (CNM) via the "UNM instability". Utilizing one of the largest multiphase turbulence simulations to date, this work elucidates key observational phenomena, including the Planck-observed E/B asymmetry and the positive TE cross-correlation, demonstrating that these signatures arise naturally from MHD turbulence in polarization maps. Furthermore, we explore turbulence-driven dust-gas dynamics within protoplanetary disks, and new algorithm of conserving magnetic helicity, investigating how dust coagulation influences the formation of planetesimals, and how the conservation of magnetic helicity affect the dynamo process.
- 일반주제명
- Aeronomy
- 일반주제명
- Physics
- 일반주제명
- Astrophysics
- 일반주제명
- Astronomy
- 키워드
- Magnetic field
- 기타저자
- The University of Wisconsin - Madison Astronomy
- 기본자료저록
- Dissertations Abstracts International. 87-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202104839
■006m o d
■007cr#unu||||||||
■020 ▼a9798290944982
■035 ▼a(MiAaPQ)AAI32172229
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a551.5
■1001 ▼aHo, Ka Wai.
■24510▼aMagnetized Turbulence in Multiphase Interstellar Media: Measurement of Turbulence, Interstellar Magnetic-Field, and Impact to Phase Structure
■260 ▼a[Sl]▼bThe University of Wisconsin - Madison▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a207 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-02, Section: B.
■500 ▼aAdvisor: Lazarian, Alexandre.
■5021 ▼aThesis (Ph.D.)--The University of Wisconsin - Madison, 2025.
■520 ▼aTurbulence is ubiquitous in the interstellar medium (ISM) and strongly influenced by magnetic fields. Understanding the interaction between magnetized turbulence and the multiphase ISM remains a central question in astrophysics. This thesis addresses these interactions through magnetohydrodynamic (MHD) turbulence theory, numerical simulations, and comparisons with observations. Additionally, We will discuss new two techniques - the Velocity Decomposition Algorithm (VDA) and the Gradient Technique (GT) - to infer turbulent velocity information and probe the magnetic field from the observation. The thesis will also discuss how that strong turbulence stabilizes the Unstable Neutral Medium (UNM), significantly extending its lifetime and increasing its mass fraction. This stabilization impacts the morphology of the Cold Neutral Medium (CNM) via the "UNM instability". Utilizing one of the largest multiphase turbulence simulations to date, this work elucidates key observational phenomena, including the Planck-observed E/B asymmetry and the positive TE cross-correlation, demonstrating that these signatures arise naturally from MHD turbulence in polarization maps. Furthermore, we explore turbulence-driven dust-gas dynamics within protoplanetary disks, and new algorithm of conserving magnetic helicity, investigating how dust coagulation influences the formation of planetesimals, and how the conservation of magnetic helicity affect the dynamo process.
■590 ▼aSchool code: 0262.
■650 4▼aAeronomy
■650 4▼aPhysics
■650 4▼aAstrophysics
■650 4▼aAstronomy
■653 ▼aInterstellar medium
■653 ▼aMagnetic field
■653 ▼aMagnetize turbulence
■653 ▼aGradient Technique
■653 ▼aUnstable Neutral Medium
■690 ▼a0367
■690 ▼a0605
■690 ▼a0596
■690 ▼a0606
■71020▼aThe University of Wisconsin - Madison▼bAstronomy.
■7730 ▼tDissertations Abstracts International▼g87-02B.
■790 ▼a0262
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359130▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
