Essays about: "Schwarzschild."

Showing result 1 - 5 of 12 essays containing the word Schwarzschild..

  1. 1. Gravitational Collapse of a Massless Scalar Field in a Theory of Minimally Modified Gravity

    University essay from KTH/Fysik

    Author : Atabak Fathe Jalali; [2024]
    Keywords : Theoretical physics; astrophysics; modified gravity; minimally modified gravity; gravitational collapse; VCDM; scalar collapse; apparent horizon; numerical relativity; Teoretisk fysik; astrofysik; modifierad gravitation; minimalt modifierad gravitation; gravitationskollaps; VCDM; skalär kollaps; uppenbar horisont; numerisk relativitet;

    Abstract : This thesis explores the spherically symmetric gravitational collapse of a massless scalar field in a minimally modified gravity theory denoted VCDM (V replaces $\Lambda$ in the $\Lambda$CDM abbreviation), a class of theories propagating the same degrees of freedom as general relativity at the expense of broken 4D diffeomorphism invariance. Numerical evolution of the equations of motion reveals that for small initial scalar profile amplitudes, no black hole forms from the collapse. READ MORE

  3. 2. Black Holes and Scalar Fields : A study of a massive scalar field around a black hole

    University essay from Uppsala universitet/Teoretisk fysik

    Author : Abdulmasih Ghazal; [2022]
    Keywords : Black holes; scalar field; General relativity; special relativity; spacetime; cosmology; Schwarzschild; Schrödinger equation; Svart hål; relativitetsteori; skalär fält; rumtid; Shrödinger; Schwarzschild.;

    Abstract : Black holes are one of the most interesting objects in the universe, and studying these objects should give exciting results. This research will investigate the General Theory of Relativity, explaining the essence of the theory needed for deriving solutions for a Schwarzschild black hole. READ MORE

  4. 3. Matter-streams as sources of the Kerr metric

    University essay from Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Author : Julian Boy; [2022]
    Keywords : General Relativity; Black holes; Physics; Kerr metric; Physics and Astronomy;

    Abstract : An introduction to the thin-shell formalism and distributional approach to General Relativity is provided. The formalism is utilized to investigate possible distributions of matter that can act as a source to the Kerr metric. READ MORE

  5. 4. Spherically Symmetric Gravitational Collapse

    University essay from Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Author : Lucas Bring; [2021]
    Keywords : gravitational collapse; gravitation; general relativity; black hole; Schwarzschild coordinates; Gullstrand-Painleve coordinates; Friedmann-Robertson-Walker metric; finite-time collapse; Physics and Astronomy;

    Abstract : This thesis presents a derivation of the equation of motion of particles in a dust star, as it undergoes collapse. This is done by finding exact solutions to the Einstein field equations. We follow the original work by Oppenheimer and Snyder, starting from the general spherically symmetric metric in comoving coordinates. READ MORE

  6. 5. Geometrical and Perturbative study of Tidally Deformed Schwarzschild Spacetime

    University essay from Uppsala universitet/Teoretisk fysik

    Author : Zeyd Sam; [2020]
    Keywords : ;

    Abstract : Vi undersöker tidvattendeformationen av ett icke-roterande, så kallade Schwarzschild, svarta hål. Vi formulerar geometrin i form av inre och yttre geometriska kvantitet på händelsehorisonten, som beskrivs av en hyperyta inbäddad i rumtiden, och vi gör det genom att formulera Gauss-Codazzi teorin om nollhyperytor som sträcker det standard resultat för rumslika och tidslika fallen. READ MORE