Search for dissertations about: "Lyman continuum"

Showing result 1 - 5 of 7 swedish dissertations containing the words Lyman continuum.

  1. 1. How ISM properties drive Lyman Continuum Escape

    University dissertation from Stockholm : Johannes Puschnig

    Author : Johannes Puschnig; Stockholms universitet.; Stockholms universitet.; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Astrophysics; Cosmology; Extragalactics; Reionization; Lyman Continuum; Interstellar Medium; ISM; Tololo 1247-232; Astronomy; astronomi;

    Abstract : The thesis introduces physical processes that are at work in astrophysical plasmas and reviews the current state of research related to the emission of ionizing photons, i.e. Lyman continuum (LyC). Star forming galaxies and active galactic nuclei are discussed as sources of LyC. READ MORE

  2. 2. On the Escape of Lyman Radiation from Local Galaxies

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Elisabet Leitet; Uppsala universitet.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Galaxies; starbursts; spiral galaxies; Lyman continuum; Lyman alpha; leakage; cosmic reionization; escape fraction; Astronomy; Astronomi;

    Abstract : Cosmic reionization was most likely initiated by star forming dwarf galaxies. Little is known about the physical mechanisms allowing ionizing Lyman continuum (LyC) photons to escape from galaxies, but to learn more we can study local galaxies in detail. READ MORE

  3. 3. Observing Lyman alpha emitters - How does Lyman alpha escape from galaxies?

    University dissertation from Stockholm : Department of Astronomy, Stockholm University

    Author : Andreas Sandberg; Göran Östlin; Lucia Guaita; Matthew Hayes; Caryl Gronwall; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Astronomy; astronomi;

    Abstract : The Lyman alpha (Lyα) emission line has grown to become one of the most successful tools for finding galaxies at high redshift. At redshifts corresponding to the early cosmic times of reionization and primeval galaxy formation, the wavelength of Lyα is still accessible with ground-based facilities. READ MORE

  4. 4. Lyman-alpha radiative transfer in Star-forming galaxies

    University dissertation from Stockholm : Department of Astronomy, Stockholm University

    Author : Florent Duval; Stockholms universitet.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Astronomy; astronomi;

    Abstract : This thesis focuses on the intrinsically strongest spectral signature of star-forming galaxies: the Lyman alpha recombination line of the hydrogen atom (hereafter Lya). Located at the wavelength of 1215. READ MORE

  5. 5. Lyman-alpha imaging of starburst galaxies in the local universe and beyond

    University dissertation from Stockholm : Institutionen för astronomi

    Author : Matthew Hayes; Stockholms universitet.; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES Physics Astronomy and astrophysics; NATURVETENSKAP Fysik Astronomi och astrofysik; Astronomy; astronomi;

    Abstract : The last decade has seen huge advances in studies of astrophysical cosmology, primarily as a result of developments in telescopic facilities. One of the primary observational signatures of actively star forming galaxies in the distant universe is the Lyman-alpha emission line (Lyα). READ MORE