Sökning: "supernovor"

Visar resultat 1 - 5 av 21 uppsatser innehållade ordet supernovor.

  1. 1. Potassium in the Galactic Bulge - as traced by microlensed dwarf & sub-giant stars

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

    Författare :Lukas Jönsson; [2023]
    Nyckelord :Nucleosynthesis; Galactic Bulge; Potassium; Non-Local-Thermal-Equilibrium; Physics and Astronomy;

    Sammanfattning : During this report the potassium (K) trend in the Galactic Bulge, with respect to metallicity and various α-elements, has been computed and evaluated by a method of line synthesis on the 7698.96 ̊A KI line (7699 KI), where Non-Local-Thermal-Equilibrium (NLTE) effects have been considered. LÄS MER

  3. 2. On The Run: How Fast Runaway Stars Can Escape From Their Home Cluster?

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Anna-Maria Söderman; [2022]
    Nyckelord :star cluster; runaway stars; velocity distribution; Physics and Astronomy;

    Sammanfattning : Galaxies contain a wide variety of star clusters with different properties. Each cluster is a possible source of runaway stars, which can be progenitors of supernovae in other parts of the galaxy than their home cluster. Considering runaway stars in galaxy simulations has shown to increase the galactic feedback. LÄS MER

  4. 3. C/O+ charge transfer & the Olson-Demkov model

    Master-uppsats, Uppsala universitet/Teoretisk astrofysik

    Författare :Kristoffer Bengtsson; [2021]
    Nyckelord :Astronomy; Charge transfer; rate coefficient; Carbon; Oxygen; energy defect; spectral modelling; supernovae;

    Sammanfattning : Charge transfer reactions and their rates play a key role in correctly estimating element abundances in astrophysical objects such as supernovae. The reaction $C + O^+ \rightarrow C^+ + O(^1D) + \Delta E$ has been shown to be of significance when estimating oxygen abundances through model spectrum evaluations, and the relative rate of this reaction can under certain circumstances completely dictate the neutralization rate of oxygen ions. LÄS MER

  5. 4. Analyzing the dust of the Nearby Universe

    Master-uppsats, Uppsala universitet/Observationell astrofysik

    Författare :Jimmy Kjellqvist; [2021]
    Nyckelord :Intergalactic dust; cosmology; cosmological measurements; quasars; Intergalaktiskt stoft; kosmologi; kosmologiska mätningar; kvasarer;

    Sammanfattning : The aim of this master thesis is to investigate the influence of intergalactic duston astronomical observations. The current cosmological paradigm of an acceleratingcosmic expansion is supported by observations of Type Ia supernovae. LÄS MER

  7. 5. Electron Acceleration at Earth Bow Shock

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

    Författare :Karl Bergson Hallberg; [2021]
    Nyckelord :electrons; acceleration; bow shock; space; MMS; IRFU;

    Sammanfattning : Electrons accelerating in shock events occur oftenin outer space, for example in supernovas and the poles of blackholes, and are of high interest to physicists and other researchers.The technology to take a closer look at events that far awaydoes not exist yet, but luckily we can observe similar events inplaces where the Earth’s magnetic fields and particle streamsfrom the Sun meet. LÄS MER