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Showing result 1 - 5 of 33 essays matching the above criteria.

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

    University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

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

    Abstract : 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. READ MORE

  3. 2. Electroweak Phase Transition in the Standard Model Effective Field Theory

    University essay from Uppsala universitet/Högenergifysik

    Author : Alan Aliyali; [2022]
    Keywords : ;

    Abstract : At least two Cosmological phase transitions are very probable to have happened since the beginning of the universe, one of them being the electroweak phase transition responsible for the breaking of the EW symmetry. It is possible that the EW phase transition could have caused the observed baryon asymmetry of the universe and therefore provide an explanation for the baryon asymmetry problem. READ MORE

  4. 3. Black Hole Dynamics in Stellar Clusters

    University essay from Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation; Lunds universitet/Astronomi - Genomgår omorganisation

    Author : Markus Strickert; [2022]
    Keywords : Black Holes; Globular Clusters; Dynamics; Intermediate-mass black holes; Simulations; Physics and Astronomy;

    Abstract : Star clusters can harbour many exotic objects, including black holes (BHs), X-ray binaries and blue straggler stars. In dense stellar environments like globular clusters (GCs), two-body relaxation drives their dynamical evolution, where gravitational interactions between stars strive to equalize their kinetic energy in the cluster. READ MORE

  5. 4. Quantum Gauge Fields in Cosmology: Cosmic Inflation and Gravitational Waves

    University essay from Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Author : Emma Hermansson; [2022]
    Keywords : Physics and Astronomy;

    Abstract : In this thesis, the consequences of introducing Yang-Mills fields into cosmology are investigated. This is done by the effective action approach, in which the coupling constant is allowed to depend on the quantum fields. READ MORE

  6. 5. Gravitational Waves in Bimetric Gravity

    University essay from Uppsala universitet/Institutionen för fysik och astronomi

    Author : Erik Schildt; [2022]
    Keywords : ;

    Abstract : Understanding the cause of the accelerated expansion of the Universe is one of the most pressing issues in modern cosmology. An alternative to the LambdaCDM-model is bimetric gravity which is an extension of Einstein's theory of general relativity. READ MORE