Search for dissertations about: "nucleosynthesis"

Showing result 1 - 5 of 15 swedish dissertations containing the word nucleosynthesis.

  1. 1. Spectral modeling of nebular-phase supernovae

    University dissertation from Stockholm : Department of Astronomy, Stockholm University

    Author : Anders Jerkstrand; Stockholms universitet.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; supernovae; nucleosynthesis; radiative transfer; massive stars; 1987A; IIP; supernovor; nukleosyntes; spektralmodellering; strålningstransport; massiva stjärnor; 1987A; IIP; astronomi; Astronomy;

    Abstract : Massive stars live fast and die young. They shine furiously for a few million years, during which time they synthesize most of the heavy elements in the universe in their cores. They end by blowing themselves up in a powerful explosion known as a supernova (SN). READ MORE

  2. 2. Stochastic Chemical Evolution A Study of Scatter in Relative Elemental Abundances in Extremely Metal-poor Stars

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Torgny Karlsson; Uppsala universitet.; [2004]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Astronomy; nucleosynthesis; chemical evolution; Galactic evolution; supernovae; chemical abundances; Population II stars; Astronomi; NATURAL SCIENCES Physics Astronomy and astrophysics; NATURVETENSKAP Fysik Astronomi och astrofysik;

    Abstract : Chemical evolution addresses the problem of the formation of the chemical elements and their evolution throughout the history of the universe. This thesis discusses in particular the chemical evolution in the young universe and what we may learn from the observations of the oldest stars. READ MORE

  3. 3. On the Winds of Carbon Stars and the Origin of Carbon A Theoretical Study

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Lars Mattsson; Uppsala universitet.; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; AGB stars; carbon stars; mass loss; stellar winds; circumstellar matter; cosmic dust; stellar evolution; nucleosynthesis; galactic chemical evolution; NATURAL SCIENCES Physics Astronomy and astrophysics; NATURVETENSKAP Fysik Astronomi och astrofysik; Astronomy; Astronomi; Fysik; Physics;

    Abstract : Carbon is the basis for life, as we know it, but its origin is still largely unclear. Carbon-rich Asymptotic Giant Branch (AGB) stars (carbon stars) play an important rôle in the cosmic matter cycle and may contribute most of the carbon in the Galaxy. READ MORE

  4. 4. Spectral lines as probes of surface gravities and galactic nucleosynthesis

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Bengt Edvardsson; Uppsala universitet.; [1987]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : .... READ MORE

  5. 5. On the Abundances of Li, Be and O in Metal-Poor Stars in the Galaxy

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Ana Elia García Pérez; Uppsala universitet.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Astronomy; galactic evolution; stellar abundances; stellar atmospheres; spectral line formation; stellar mixing; Astronomi; NATURAL SCIENCES Physics Astronomy and astrophysics; NATURVETENSKAP Fysik Astronomi och astrofysik;

    Abstract : Stellar atmospheres constitute excellent environments to study the chemical evolution of our Galaxy. The chemical composition of these atmospheres reflects the composition of the gas from where these stars were born. READ MORE