Sökning: "accretion"

Visar resultat 6 - 10 av 68 avhandlingar innehållade ordet accretion.

  1. 6. Accretion and time variability of T Tauri stars

    Författare :Erik Gullbring; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Stars; Stjärnor;

    Sammanfattning : .... LÄS MER

  3. 7. Transport, Turbulence and Instabilities in Cosmic Magnetic Fields

    Författare :Giuseppe Di Bernardo; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cosmic Rays; Interstella Medium; Galactic Magnetic Fields; Magnetohydrodynamics Turbulence; Accretion Discs;

    Sammanfattning : This decade has seen a large number of space missions, which, alongside ground-based radio, optical and gamma-ray telescopes, have enabled a deep insight into the non-thermal astrophysical environments. Interstellar Medium (ISM), Supernovae Remnants (SNRs) and Black-Hole (BH) accretion discs (ADs) are only a few examples of natural habitat of interaction of relativistic particles and magnetic fields, largely mediated by the action of the turbulence. LÄS MER

  4. 8. Formation and Evolution of Protoplanetary Discs

    Författare :Johan Appelgren; Astrofysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Protoplanetary discs; Accretion discs; planet formation;

    Sammanfattning : Protoplanetary discs and the protostars they surround are formed from the gravitational collapse of molecularcloud cores. These discs consist primarily of gas, with a small but important dust component. The roughlymm-sized grains that make up the dust component are the building blocks of planets. LÄS MER

  5. 9. Gravitational accretion of planetesimals as a mechanism for planetary rotation

    Författare :R. Thomas Giuli; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER

  7. 10. Cooling the Envelopes of Gas Giants : Accretion, structure formation and observability

    Författare :Matthäus Schulik; Astronomi - Genomgår omorganisation; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Planet formation; Hydrodynamics; Giant planets;

    Sammanfattning : We know now that discs of gas and dust, so-called protoplanetary discs, form planets as side-products of the naturally occurring star formation process throughout the Milky Way. Young, growing planets in such discs are commonly referred to as protoplanets. LÄS MER