Sökning: "N-body"

Visar resultat 1 - 5 av 39 uppsatser innehållade ordet N-body.

  1. 1. Exocomets in the β Pictoris system

    Kandidat-uppsats, Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

    Författare :Klaudia Jaworska; [2024]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : Comets have been a source of fascination throughout the history of man. In recent years, advances in technology have opened up for the study of extrasolar objects, among them exocomets. The first exocomets were observed in the β Pictoris system almost 50 years ago and the system has been of interest ever since. LÄS MER

  3. 2. N-body simulations of exoplanets and their moons

    Master-uppsats, Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

    Författare :Lydia Schollmeier; [2024]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : The planet-planet interactions in a many-planet system cannot be analytically calculated. Instead, they have to be investigated by using an N-body simulation. I discuss three questions about the N-body interactions in planetary systems: The first two are on the system 55 Cnc, a system with five known planets around a K-type star. LÄS MER

  4. 3. Warm dark matter simulations and 21cm astronomy

    Kandidat-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Melker Marminge; [2023]
    Nyckelord :Warm Dark Matter; N-body Simulation; Power Spectrum; Neutral Hydrogen; Cosmology;

    Sammanfattning : The recent boom in 21cm astronomy has piqued the interest of many, especially cosmologists realizing its applications in their field. This study aims to determine if 21cm astronomy is a good tool for testing the validity of keV WDM models, as well as creating a code capable of simulating keV WDM models from an existing CDM code. LÄS MER

  5. 4. Investigating the density evolution of charged particles inside a square domain

    L3-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Wenhan Zhou; [2023]
    Nyckelord :N-body problem; PINN;

    Sammanfattning : In this work, I propose a hybrid particle simulator for charged particles. The simulator consists of a physics-informed neural network, which can handle arbitrary external electric fields with continuous coordinates by solving the Poisson equation, and a graph-based algorithm that computes the interacting forces between the particles. LÄS MER

  7. 5. Intermediate-mass black hole binary as an origin of super-massive black holes

    Kandidat-uppsats, Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

    Författare :Isabelle Signe Maj Maria Thord; [2023]
    Nyckelord :Intermediate-mass black holes; binary; merger; hardening; encounters; Physics and Astronomy;

    Sammanfattning : Galactic nuclei contain super-massive black holes (SMBHs), nuclear stellar clusters (NSCs), or both. In the NSC, intermediate-mass black holes (IMBHs) are likely to reside and form highly eccentric binaries. Over time, the orbit of a binary could harden via interaction with surrounding low-mass stars. LÄS MER