Essays about: "Nucleosynthesis"

Showing result 1 - 5 of 16 essays containing the word Nucleosynthesis.

1. 1. Potassium in the Galactic Bulge - as traced by microlensed dwarf & sub-giant stars

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

   Author : Lukas Jönsson; [2023]
   Keywords : Nucleosynthesis; Galactic Bulge; Potassium; Non-Local-Thermal-Equilibrium; Physics and Astronomy;

   Abstract : During this report the potassium (K) trend in the Galactic Bulge, with respect to metallicity and various α-elements, has been computed and evaluated by a method of line synthesis on the 7698.96 ̊A KI line (7699 KI), where Non-Local-Thermal-Equilibrium (NLTE) effects have been considered. READ MORE

3. 2. Towards Automatic Model Atoms from the VALD Atomic Database: from He to U

   University essay from Uppsala universitet/Teoretisk astrofysik

   Author : Samuel Hermansson; [2023]
   Keywords : r-process; nucleosynthesis; kilonovae; VALD;

   Abstract : The ejecta following the collision and merging of two neutron stars (kilonova) are currently considered promising sites for nucleosynthesis of r-process elements. Since the observed kilonova in 2017, GW2017817, astrophysicists have been working to analyze the collected electromagnetic spectra, trying to identify r-process elements. READ MORE

4. 3. 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 fysik

   Author : Fredrik Plane; [2023]
   Keywords : Computational atomic physics; Atomic physics; Physics; Astronomy; Astrophysics; Neutron stars; Stars; Relativisitc atomic physics; Configuration-interaction; Perturbation theory; Many-body perturbation theory;

   Abstract : 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. 4. Big Bang nucleosynthesis with a historical touch

   University essay from Stockholms universitet/Fysikum

   Author : Elisabeth Ström; [2021]
   Keywords : Big Bang nucleosynthesis;

   Abstract : .... READ MORE

6. 5. Can Feebly Interacting Massive Particles (FIMP) constitute Dark Matter?

   University essay from KTH/Fysik

   Author : Grandharva Appagere; [2021]
   Keywords : Dark Matter; Higgs¬portal; Freeze¬-in mechanism; FIMP; C-W Mechanism; Mörk materia; Higgsportal; frys-in-mekanism; FIMP; C-W mekanism;

   Abstract : In this study, we investigate the feasibility of Feebly Interacting Massive particles (FIMP) as possible candidates to constitute the observed Dark Matter abundance in the universe. FIMPs are particles that couple very feebly with known particles in the Standard Model (SM). READ MORE