Sökning: "planet formation"

Visar resultat 1 - 5 av 30 uppsatser innehållade orden planet formation.

  1. 1. How did Jupiter form?

    Kandidat-uppsats, Lunds universitet/Astronomi

    Författare :Calle Ahlgren; [2019]
    Nyckelord :Planet formation; Planet migration; Physics and Astronomy;

    Sammanfattning : Two relatively new concepts in planetary science are planetary migration; wherein the planets migrate through the protoplanetary disk as they form, and pebble accretion; wherein the planetesimals which become terrestrial planets and giant planet cores grow through the accretion of small pebbles. Planetary migration has become a generally accepted concept but there is still much to be learned even about how it affected the formation of our own solar system. LÄS MER

  2. 2. Gone With the Headwind. Characterizing Erosion Using Lattice-Boltzmann Method : and its Implication in Planet Formation

    Master-uppsats, Stockholms universitet/Fysikum

    Författare :Lukas Cedenblad; [2019]
    Nyckelord :Erosion; Planet formation; Lattice-Boltzmann;

    Sammanfattning : Erosion has a long history in science and is used in many different fields today, for example in geology for coastal erosion and in the oil industry for pipe erosion. It is very difficult to study erosion both analytically. Numerically it is difficult due to moving and shape-changing boundaries. LÄS MER

  3. 3. For the People, for the Planet: How Social Entrepreneurs in the Global South and Facilitators from the Global North Construct Legitimacy for the Field of Social Entrepreneurship

    D-uppsats, Handelshögskolan i Stockholm/Institutionen för företagande och ledning; Handelshögskolan i Stockholm/Institutionen för marknadsföring och strategi

    Författare :Eva Katzer; [2019]
    Nyckelord :Social Entrepreneurship; Legitimacy; Discursive Institutionalism; Global South; Sub-Saharan Africa;

    Sammanfattning : In efforts to leverage private sector approaches for achieving the Sustainable Development Goals (SDGs), social entrepreneurship has gained popularity drawing on a hybrid approach of business-minded strategies for pursuing a social mission. Legitimacy construction serves to justify resource allocation by facilitators from the Global North and pitch for resource acquisition by social entrepreneurs in the Global South. LÄS MER

  4. 4. Detailed analysis of the chemical composition of stars harboring Earth-like planets

    Master-uppsats, Lunds universitet/Astronomi

    Författare :Lorena Acuña Aguirre; [2019]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : Context. The planet-metallicity correlation for gaseous giants is widely accepted through spectroscopic studies. However, whether a similar correlation exists for terrestrial planets is a debated subject. LÄS MER

  5. 5. The fate of pebbles and planetesimals entering protoplanetary envelopes

    Master-uppsats, Lunds universitet/Astronomi

    Författare :Emil Zadera; [2019]
    Nyckelord :Planet formation; planet; protoplanet; protoplanetary envelope; protoplanetary atmosphere; protoplanetary growth; planetary growth model; accretion rate; vapour blob; vapourblob; vapour planet; transport of water; water on planet; pebbles; planetesimals; pebble accretion; planetesimal accretion; meteors; ablation; fragmentation; sublimation; protoplanetary disk; MMSN; accretion window; accretion channel; accretion; destruction; disruption; terminal velocity; gas; gasflow; shearingbox; exoplanet; Physics and Astronomy;

    Sammanfattning : Planetary embryos grow by the accretion of solid dust-material, ranging from cm- to m-sized pebbles up to km-sized planetesimals. However, the underlying size-distribution of the accreted material is poorly understood. LÄS MER