Advanced search
Showing result 1 - 5 of 63 essays matching the above criteria.
-
1. Exocomets in the β Pictoris system
University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionenAbstract : 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. READ MORE
-
2. N-body simulations of exoplanets and their moons
University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionenAbstract : 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. READ MORE
-
3. Can Dwarf Galaxies Tell Us How the Milky Way Formed?
University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionenAbstract : Dwarf galaxies are a key component in understanding the evolution of galaxies and provide tests on the standard cosmological $\Lambda$ Cold Dark Matter model. According to the formation hierarchy, dwarf galaxies are the pieces that create all galaxies. Our current understanding of dwarf galaxies faces discrepancies between theory and observations. READ MORE
-
4. Atomic Structure Calculations Using Configuration-Interaction And Many-Body Perturbation Theory For Spectral Modelling Of Neutron Star Mergers : Example Of Ce I - Iv
University essay from Uppsala universitet/Teoretisk fysikAbstract : The binary neutron star merger of 2017 and its corresponding electromagnetic signature resembling that of a kilonova has been one of the most groundbreaking astrophysical occurrences in the last decade. Indications of r-process nucleosynthesis in this event presents new opportunities for learning about the astrophysical origin of heavy elements. READ MORE
-
5. Beyond the Gross-Pitaevskii Equation: A Perturbative Approach
University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Teknisk fysik (CI)Abstract : We propose and implement a beyond Gross-Pitaevskii approach based on Many-Body Perturbation theory (MBPT) for the study of Bose-Einstein Condensate (BECs) ground states. Two partitions of the system Hamiltonian are considered. READ MORE