Sökning: "spiral galaxies"

Visar resultat 1 - 5 av 22 avhandlingar innehållade orden spiral galaxies.

  1. 1. Simulations of spiral galaxies

    Författare :Magnus Thomasson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; interstellar medium; spiral galaxies; kinematics; dynamics; interstellar matter;

    Sammanfattning : .... LÄS MER

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

    Författare :Elisabet Leitet; Nils Bergvall; Erik Zackrisson; Bengt Gustafsson; Duilia F. De Mello; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Galaxies; starbursts; spiral galaxies; Lyman continuum; Lyman alpha; leakage; cosmic reionization; escape fraction; Astronomy; Astronomi;

    Sammanfattning : 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. LÄS MER

  4. 3. Multi frequency interferometer studies of active and starburst galaxies

    Författare :Evert Olsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; galaxies: active; galaxies: ISM; galaxies: starburst; galaxies: evolution;

    Sammanfattning : We report the results of a multi-frequency study of three interactinggalaxies: NGC 5218, NGC 1614 and NGC 4194 (the Medusa merger). These sourcesbelong to different classes of active and starburst galaxies. LÄS MER

  5. 4. Dynamics of the interstellar matter in galaxies : isolated barred spiral galaxies : cloud formation processes

    Författare :Kristen Helmuth; John Beckman; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astronomy; Astronomi; Astronomy; astronomi;

    Sammanfattning : The dynamical components of six isolated barred spiral (SB) galaxies are investigated. No evidence is found supporting the hypothesis of a low amount of dark matter being characteristic of SB galaxies. The presence of companion galaxies is found to correlate with an increased statistical spread in the neutral hydrogen (HI) extent. LÄS MER

  7. 5. Molecular clouds and star formation in galaxies

    Författare :Tommy Wiklind; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; molecular radio lines; interstellar medium; Early type galaxies; galaxy kinematics and dynamics; spiral galaxies;

    Sammanfattning : .... LÄS MER