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Kinetic Modeling of Relativistic Turbulencewith Application to Astrophysical Jets
Kinetic Modeling of Relativistic Turbulencewith Application to Astrophysical Jets
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152048
- ISBN
- 9798342106481
- DDC
- 500
- 저자명
- Davis, Zachary.
- 서명/저자
- Kinetic Modeling of Relativistic Turbulencewith Application to Astrophysical Jets
- 발행사항
- [Sl] : Purdue University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 126 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-04, Section: B.
- 주기사항
- Advisor: Giannios, Dimitrios.
- 학위논문주기
- Thesis (Ph.D.)--Purdue University, 2024.
- 초록/해제
- 요약Understanding the acceleration of particles responsible for high-energy non-thermal phenomena in astrophysical jets is a ubiquitous pursuit. A possible culprit for non-thermal particle acceleration is turbulence. Specifically in this thesis, I investigate highly magne- tized or relativisticturbulence, where the magnetic energy to enthalpy ratio of the plasma is much greater than one, as a possible high-energy accelerator inside relativistic jets. I do this through three distinct projects.My first project [1] (discussed in Section 3) was built upon a recent study of relativistic turbulence from [2], which found that a non-thermal particle equilibrium can be achieved when a plasma is heated via turbulence but allowed to cool radiatively. I extrapolated these results from PIC (Particle-in-Cell) simulations to larger scales and magnetizations, allowing me to encode key microphysical results of PIC simulations into a Fokker-Planck formalism. Combining these results with a single zone model for a blazar jet, I successfully define the underlying particle distribution with the global parameters of the emission region. To test this model, I fit data from 12 sources and successfully constrain key blazar parameters such as magnetization, bulk Lorentz factor, emission region size, and distance from the central engine.My second project covers the development and testing of the open-source toolkit Tleco. This code base was used to evolve the Fokker-Planck equation and solve the resultant emission in my first project. Tleco offers efficient algorithms for evolving particle distributions and solving the resultant emission. It is meant to be user-friendly and easily customizable.My third project attempts to enhance our understanding of coherent structures in relativistic turbulence. I employ intermittency analysis to establish a link between statistical fluctuations within the plasma and regions of high-energy dissipation. To achieve this, we used first-principle turbulent PIC simulations across a range of magnetizations and fluctuating magnetic field values. By utilizing the statistical fluctuations to determine the fractal dimension of the structures, I then examine their filling fraction and its dependence on magnetization and the fluctuating magnetic field.
- 일반주제명
- Plasma
- 일반주제명
- Energy
- 일반주제명
- Cooling
- 일반주제명
- Charged particles
- 일반주제명
- Black holes
- 일반주제명
- Magnetic fields
- 일반주제명
- Radiation
- 일반주제명
- Astronomy
- 일반주제명
- Astrophysics
- 일반주제명
- Atomic physics
- 일반주제명
- Electromagnetics
- 일반주제명
- Theoretical physics
- 기타저자
- Purdue University.
- 기본자료저록
- Dissertations Abstracts International. 86-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017162737
■00520250211152048
■006m o d
■007cr#unu||||||||
■020 ▼a9798342106481
■035 ▼a(MiAaPQ)AAI31345211
■035 ▼a(MiAaPQ)Purdue25655319
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a500
■1001 ▼aDavis, Zachary.
■24510▼aKinetic Modeling of Relativistic Turbulencewith Application to Astrophysical Jets
■260 ▼a[Sl]▼bPurdue University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a126 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-04, Section: B.
■500 ▼aAdvisor: Giannios, Dimitrios.
■5021 ▼aThesis (Ph.D.)--Purdue University, 2024.
■520 ▼aUnderstanding the acceleration of particles responsible for high-energy non-thermal phenomena in astrophysical jets is a ubiquitous pursuit. A possible culprit for non-thermal particle acceleration is turbulence. Specifically in this thesis, I investigate highly magne- tized or relativisticturbulence, where the magnetic energy to enthalpy ratio of the plasma is much greater than one, as a possible high-energy accelerator inside relativistic jets. I do this through three distinct projects.My first project [1] (discussed in Section 3) was built upon a recent study of relativistic turbulence from [2], which found that a non-thermal particle equilibrium can be achieved when a plasma is heated via turbulence but allowed to cool radiatively. I extrapolated these results from PIC (Particle-in-Cell) simulations to larger scales and magnetizations, allowing me to encode key microphysical results of PIC simulations into a Fokker-Planck formalism. Combining these results with a single zone model for a blazar jet, I successfully define the underlying particle distribution with the global parameters of the emission region. To test this model, I fit data from 12 sources and successfully constrain key blazar parameters such as magnetization, bulk Lorentz factor, emission region size, and distance from the central engine.My second project covers the development and testing of the open-source toolkit Tleco. This code base was used to evolve the Fokker-Planck equation and solve the resultant emission in my first project. Tleco offers efficient algorithms for evolving particle distributions and solving the resultant emission. It is meant to be user-friendly and easily customizable.My third project attempts to enhance our understanding of coherent structures in relativistic turbulence. I employ intermittency analysis to establish a link between statistical fluctuations within the plasma and regions of high-energy dissipation. To achieve this, we used first-principle turbulent PIC simulations across a range of magnetizations and fluctuating magnetic field values. By utilizing the statistical fluctuations to determine the fractal dimension of the structures, I then examine their filling fraction and its dependence on magnetization and the fluctuating magnetic field.
■590 ▼aSchool code: 0183.
■650 4▼aPlasma
■650 4▼aEnergy
■650 4▼aCooling
■650 4▼aCharged particles
■650 4▼aBlack holes
■650 4▼aMagnetic fields
■650 4▼aRadiation
■650 4▼aAtoms & subatomic particles
■650 4▼aAstronomy
■650 4▼aAstrophysics
■650 4▼aAtomic physics
■650 4▼aElectromagnetics
■650 4▼aTheoretical physics
■690 ▼a0791
■690 ▼a0606
■690 ▼a0596
■690 ▼a0748
■690 ▼a0607
■690 ▼a0753
■71020▼aPurdue University.
■7730 ▼tDissertations Abstracts International▼g86-04B.
■790 ▼a0183
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162737▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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