Search for dissertations about: "Galaxy evolution"

Showing result 1 - 5 of 55 swedish dissertations containing the words Galaxy evolution.

  1. 1. Star-forming Dwarf Galaxies Internal motions and evolution

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Thomas Marquart; Nils Bergvall; Janice Lee; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Galaxy; Galaxies; Dynamics; Kinematics; Starburst; Dwarf Galaxies; Blue Compact Galaxies; Star Formation; Galaxy mergers; 3D-Spectroscopy; Spectroscopy; Astronomy; Astronomi;

    Abstract : The study of dwarf galaxies is important in order to better understand the physics of the young universe and how larger galaxies form and evolve. In this work we focus on Blue Compact Galaxies (BCGs) which havemuch enhanced star formation (starbursts), causing blue colours and strong emission line spectra. 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. The nature of stars with a common origin: clues from metallicity, elemental abundances, and kinematics

    University dissertation from Department of Astronomy and Theoretical Physics, Lund University

    Author : Cheng Liu; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Stars: abundances; Galaxy: evolution; Galaxy: solar neighbourhood; Galaxy: bulge; Galaxy: globular clusters;

    Abstract : Most of field stars originate from dissolved star clusters. If the gas cloud is well mixed the stars in the cluster are expected to be chemically homogenous. READ MORE

  4. 4. The origin and chemical evolution of iron-peak and neutron-capture elements in the Milky Way disk

    University dissertation from Department of Astronomy and Theoretical Physics, Lund University

    Author : Chiara Battistini; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Stars: abundances; Stars: solar-type; Galaxy: disk; Galaxy: evolution; Galaxy: solar neighbourhood;

    Abstract : All the elements heavier than Li are created during stellar evolution. Even if our knowledge of this process is good, many questions still remain. READ MORE

  5. 5. On the origin and evolution of blue compact galaxies

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Göran A. Östlin; [1998]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Astronomy; galaxies - compact; formation; evolution; starburst; interactions; dwarf; photometry; kinematics and dynamics; low surface brightness galaxies; Astronomi; NATURAL SCIENCES Physics Astronomy and astrophysics; NATURVETENSKAP Fysik Astronomi och astrofysik; astronomi; Astronomy;

    Abstract : This thesis is focused on the origin and evolution of blue compact galaxies (BCGs). BCGs are low mass galaxies characterised by blue colours, low chemical abundances and high star formation rates. The gas consumtion time scale is considerable shorter than the age of the universe and thus the high star formation rate must be transient. READ MORE