Sökning: "photometric metallicities"

Hittade 4 uppsatser innehållade orden photometric metallicities.

  1. 1. The Metallicity Structure of the Milky Way Halo II : Characterising the distant halo substructure

    Master-uppsats, Uppsala universitet/Observationell astrofysik

    Författare :Amanda Byström; [2022]
    Nyckelord :Milky Way; Galactic archaeology; halo; photometric metallicities; stellar catalogue; Gaia-Enceladus-Sausage; Sagittarius; Pristine survey; metallicity; Gaia mission;

    Sammanfattning : The Milky Way galaxy, like all spiral galaxies, is surrounded by a roughly spherical distribution of stars called the halo. The halo was largely formed when the galaxy merged with smaller galaxies. LÄS MER

  3. 2. The Metallicity Structure of the Milky Way halo I : Creating a stellar catalogue of the distant halo’s red giants

    L3-uppsats, Uppsala universitet/Observationell astrofysik

    Författare :Amanda Byström; [2021]
    Nyckelord :Milky Way; Galactic archaeology; halo; photometric metallicities; stellar catalogue; giant stars; distance calculations; Pristine survey; Gaia mission; metallicity distribution;

    Sammanfattning : The Milky Way's halo is an approximately spherical distribution of stars surrounding the Galaxy that carries the history of the Milky Way. The outer halo is a Galactic region with long dynamical timescales largely built up by accreted material. LÄS MER

  4. 3. 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

  5. 4. Leo II: a distant dwarf spheroidal galaxy

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

    Författare :Tim Olsson; [2017]
    Nyckelord :dwarf spheroidal galaxy strömgren photometry; Physics and Astronomy;

    Sammanfattning : In this project aperture photometry has been performed for stars in the direction of the dwarf spheroidal galaxy Leo II. The observations were carried out using the Stro ̈mgren filters v, b and y, during three consecutive nights in 2003, out of which all but the first one turned out to be non-photometric. LÄS MER