Sökning: "Asymptotic giant branch"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden Asymptotic giant branch.

  1. 1. Origin of blue straggler stars in the Milky Way halo

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

    Författare :Adam Brcek; [2023]
    Nyckelord :Blue Straggler; Galactic Halo; Spectroscopic Surveys; Binary Star Evolution; Mass Transfer; Physics and Astronomy;

    Sammanfattning : Blue straggler stars (BSSs) are exotic stellar objects that appear to be younger than the age of the population they come from suggests. They are observed as the extension of the main sequence stars, beyond the turn-off point. LÄS MER

  3. 2. Post-Main Sequence Habitability for Outer Solar System Moons

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

    Författare :Viktor Sparrman; [2022]
    Nyckelord :Habitability; Habitable Zone; Greenhouse Effect; Outer moons; Red Giant Branch; Horizontal Branch; Asymptotic Giant Branch; solar evolution;

    Sammanfattning : The search for extra-terrestrial life is guided by the classification of promising candidate worlds. In this classification the habitable zone acts as a measure for the perceived habitability of a circumstellar body. Habitable zone definitions vary between using a conservative and an optimistic limit. LÄS MER

  4. 3. Testing the multi-epoch luminosity function of asymptotic giant branch stars in the Small Magellanic Cloud with VISTA

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

    Författare :Róisín O'Rourke Brogan; [2020]
    Nyckelord :stars: AGB; stars: late-type; stars: atmospheres; stars: variable; small magellanic cloud; magellanic system; stellar populations; model stellar populations; dwarf galaxies;

    Sammanfattning : The physics pertaining to the asymptotic giant branch (AGB) phase of stellar evolution has been studied for many years. However, the mechanics behind many characteristics displayed at this stage are still not fully understood. LÄS MER

  5. 4. Photometry of carbon star wind-modelsat solar & sub-solar metallicities

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

    Författare :Vlad Rastau; [2020]
    Nyckelord :C-type AGB; photometry; mass-loss;

    Sammanfattning : Asymptotic giant branch stars (AGB) are cool, luminous stars withan initial mass of approximately 0.8 to 8 solar masses. Towards theend of their lives they undergo heavy mass loss, a process thoughtto be caused by dust-driven winds. When it comes to carbon-richAGB stars, i. LÄS MER

  7. 5. Measuring the Characteristic Sizes of Convection Structures in AGB Stars with Fourier Decomposition Analyses : the Stellar Intensity Analyzer (SIA) Pipeline.

    Master-uppsats, Uppsala universitet/Teoretisk astrofysik

    Författare :Miquel Colom i Bernadich; [2020]
    Nyckelord :Asymptotic Giant Branch; AGB; red giants; stars; stellar convection; Fourier analysis; convection cells;

    Sammanfattning : Context. Theoretical studies predict that the length scale of convection in stellar atmospheres isproportional to the pressure scale height, which implies that giant and supergiant stars should have convection granules of sizes comparable to their radii. LÄS MER