Sökning: "ionised"

Visar resultat 1 - 5 av 8 uppsatser innehållade ordet ionised.

  1. 1. Probing the Structure of Ionised ISM in Lyman-Continuum-Leaking Green Pea Galaxies with MUSE

    Master-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Chinmaya Nagar; [2023]
    Nyckelord :Emission-line ratio; Gaussian convolution; Green pea galaxies; ISM; Ionised ISM; Lyman continuum LyC ; Low-Redshift Lyman Continuum Survey LzLCS ; Lyman continuum emitter LCE ; LyC escape; LyC escape fraction; MUSE; MPDAF; Voronoi binning;

    Sammanfattning : Lyman continuum (LyC) photons are known to be responsible for reionising the universe after the end of the Dark Ages, which marked a period called the Epoch of Reionisation (EoR). While these high-energy photons are thought to predominantly originate from young, hot, massive stars within the earliest galaxies, and contributions from high-energy sources like quasars and AGN, the origins of these photons are yet not well known and highly debated. LÄS MER

  3. 2. Simulations of the Tenuous Upper Atmospheres of Exoplanets

    Master-uppsats, Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

    Författare :Lucian Spitzner; [2023]
    Nyckelord :astronomy; astrophyics; exoplanets; transmission spectroscopy; magnetic fields; atmospheres; ions; Physics and Astronomy;

    Sammanfattning : Over the last decade, the interest in research on extraterrestrial planets has expanded dramatically. With the number of confirmed exoplanets having increased tenfold over the last ten years, we now know that many different types of exoplanets exist. LÄS MER

  4. 3. Measuring the [C II]-to-H I connection in high-redshift absorption-selected galaxies

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Gaurav Senthil Kumar; [2022]
    Nyckelord :QSO; Quasar; Black Hole; AGN; Active Galactic Nuclei; DLA; Damped Lyman Alpha; C II; [C II]; H I; Sightline; HST; X-shooter; Spectroscopy; Echelle Spectroscope; Hyperfine transition; Hyperfine; Physics and Astronomy;

    Sammanfattning : HI neutral gas is the basic building block of galaxies. It dictates the star formation rate and hence the metal enrichment rates within high redshift galaxies. HI neutral gas cannot be directly observed beyond z ≈ 0. LÄS MER

  5. 4. Solution of the neutrals species in a weakly ionised plasma by means of the SIMPLE algorithm

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Alberto Zorzetto; [2021]
    Nyckelord :Boundary conditions; Helicon Plasma Thruster; Neutrals species; OpenFOAM®; Plasma; SIMPLE; Gränsvillkor; Helicon Plasma Thruster; Neutrala Partiklar; OpenFOAM®; Plasma; SIMPLE;

    Sammanfattning : In recent years, the Helicon Plasma Thruster (HPT) has become one of the most promising technologies of in-space electric propulsion. T4i Technology for Propulsion and Innovation S.P.A. LÄS MER

  7. 5. Implementation of Collisions in FEMIC for Modelling of the RF Heating with a Lower Hybrid Resonance

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Léo Belleil; [2020]
    Nyckelord :;

    Sammanfattning : Fusion energy is a potential sustainable solution to provide clean energy for the human society. The fusion reaction requires that the ionised fuel (plasma) is heated to extreme temperatures. Magnetic confinement is used to keep the plasma away from the wall and the components mounted on it. LÄS MER