Search for dissertations about: "solar system: formation"

Showing result 1 - 5 of 51 swedish dissertations containing the words solar system: formation.

  1. 1. The Formation of Giant Planets

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

    Author : Michiel Lambrechts; Lund University.; Lunds universitet.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Planet formation; Solar System; Exoplanets; Giant planets; Hydrodynamics;

    Abstract : Giant planets form embedded in a protoplanetary disc around a young star. Close to the midplane a large fraction of the available mass in solids is found in particles of cm to dm in size, which drift towards the star due to friction with the surrounding gas. READ MORE

  2. 2. Turbulence-Assisted Planetary Growth Hydrodynamical Simulations of Accretion Disks and Planet Formation

    University dissertation from Uppsala : Universitetsbiblioteket

    Author : Wladimir Lyra; Uppsala universitet.; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; accretion; accretion disks; hydrodynamics; instabilities; methods: numerical; solar system: formation; planets and satellites: formation; magnetohydrodynamics MHD ; turbulence; diffusion; stars: planetary systems: formation; NATURAL SCIENCES Physics Astronomy and astrophysics; NATURVETENSKAP Fysik Astronomi och astrofysik;

    Abstract : The current paradigm in planet formation theory is developed around a hierarquical growth of solid bodies, from interstellar dust grains to rocky planetary cores. A particularly difficult phase in the process is the growth from meter-size boulders to planetary embryos of the size of our Moon or Mars. READ MORE

  3. 3. Formation of solar bipolar regions Magnetic flux concentrations from suction of the negative effective magnetic pressure instability

    University dissertation from Stockholm : Department of Astronomy, Stockholm University

    Author : Illa Rivero Losada; Stockholms universitet.; [2018]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Magnetohydrodynamics MHD ; turbulence; dynamo; Sun: magnetic fields; Sun: rotation; Sun: activity; Sun: dynamo; Astronomy; astronomi;

    Abstract : Sunspots stand out on the visible solar surface. They appear as dark structures evolving and changing over time. They host energetic and violent events, like coronal mass ejections and flares, and concentrate strong magnetic fields. READ MORE

  4. 4. Energy Transfer and Conversion in the Magnetosphere-Ionosphere System

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Lisa Rosenqvist; Uppsala universitet.; [2008]
    Keywords : Space and plasma physics; solar system; space physics; magnetospheric physics; plasma physics; magnetic storms; substorms; boundary layers; magnetic reconnection; energy conversion; space weather; Rymd- och plasmafysik;

    Abstract : Magnetized planets, such as Earth, are strongly influenced by the solar wind. The Sun is very dynamic, releasing varying amounts of energy, resulting in a fluctuating energy and momentum exchange between the solar wind and planetary magnetospheres. READ MORE

  5. 5. Disentangling the Early History of the Solar System

    University dissertation from Lund University (Media-Tryck)

    Author : Simona Pirani; Lund University.; Lunds universitet.; [2020]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; planets and satellites: formation; planets and satellites: dynamical evolution and stability; Kuiper belt: general;

    Abstract : Giant planets form out of a disc of gas and dust – called protoplanetary disc -- that surrounded the protosun at the time of its formation. While the cores of giant planets were growing via planetesimal and pebble accretion, they started to interact with the gas in the protoplanetary disc. READ MORE