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Showing result 1 - 5 of 22 essays matching the above criteria.

  1. 1. Forming wide-orbit planets via pebble accretion

    University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

    Author : Nerea Gurrutxaga; [2023]
    Keywords : Planet Formation; Pebble Accretion; Protoplanetary Disk; Wide-Orbit Planet; Physics and Astronomy;

    Abstract : The possibility that detected substructures in protoplanetary disks, such as gaps, rings and cavities, are created by distant protoplanets has prompted an inquiry into the mechanism responsible for their formation. These wide-orbit young bodies are likely to form relatively rapidly in the outer regions of circumstellar disks. READ MORE

  2. 2. “Zviedrija ne ēd pīrāgi”: A case study of heritage Latvian in Sweden : Heritage language exposure and language change in preadolescent heritage speakers

    University essay from Stockholms universitet/Baltiska språk

    Author : Signe Rirdance; [2023]
    Keywords : Language change; Latvian in Sweden; diaspora Latvian; heritage Latvian; family language policy; language maintenance; language attrition; heritage language acquisition; divergent attainment; Språkförändring; lettiska i Sverige; lettisk diaspora; lettiska arvsspråket; hemspråkspolicy; språkunderhåll; språkförlust; inlärning av arvsspråk; avvikande språkförmåga; Valodas pārmaiņas; latviešu valoda Zviedrijā; diasporas latviešu valoda; etniskā mantojuma valoda; ģimenes valodas politika; valodas uzturēšana; valodas zaudēšana; mantojuma valodas apguve; atšķirīga valodas apguve;

    Abstract : Heritage languages are increasingly seen as a source of important insight in linguistics. Latvian has a long and under-researched history as a heritage language, with a heterogenous community of heritage speakers from two waves of migration in many countries including Sweden. READ MORE

  3. 3. Capture into mean motion resonance

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation

    Author : Kaltrina Kajtazi; [2021]
    Keywords : MMR; Mean motion resonance; Planetary dynamics; First order MMR; Numerical integration with N-body; Physics and Astronomy;

    Abstract : Orbital or mean motion resonance (MMR) occurs when the orbital period ratio between two planets is close to a ratio of small integers. MMR can protect planets from collisions and affects the overall final architecture of the system. READ MORE

  4. 4. Generation and Characterization of Intense Attosecond Pulses

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Author : Marius Plach; [2020]
    Keywords : Attosecond physics; high-order harmonic generation; high harmonic generation; HHG; attosecond pulses; molecular dynamics; attosecond pulse generation; harmonic emission time delay; temporal reconstruction of attosecond pulses; strong field processes; Three-step model; RABBIT; Reconstruction of Attosecond Beating By Interference of Two-photon Transition; Terawatt Laser System; Intense XUV Beamline; XUV; LLC; Physics and Astronomy;

    Abstract : Research on ultrafast dynamics in atoms and molecules requires short pulses. In order to resolve processes taking place on a femtosecond timescale sufficiently, these pulses require a duration on the attosecond time scale. READ MORE

  5. 5. How did Jupiter form?

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation

    Author : Calle Ahlgren; [2019]
    Keywords : Planet formation; Planet migration; Physics and Astronomy;

    Abstract : 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. READ MORE