Sökning: "Gaia"

Visar resultat 21 - 25 av 65 uppsatser innehållade ordet Gaia.

  1. 21. Magnificent beasts of the Milky Way: Hunting down stars with unusual infrared properties using supervised machine learning

    Master-uppsats, Uppsala universitet/Observationell astrofysik

    Författare :Julia Ahlvind; [2021]
    Nyckelord :machine learning; supervised machine learning; support vector machine; photometry; stars; stellar physics; astronomical archives;

    Sammanfattning : The significant increase of astronomical data necessitates new strategies and developments to analyse a large amount of information, which no longer is efficient if done by hand. Supervised machine learning is an example of one such modern strategy. LÄS MER

  3. 22. 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. 23. Examining LUMBA UVES pipeline spectroscopy on giant and sub-giant stars of M67

    Master-uppsats, Uppsala universitet/Observationell astrofysik

    Författare :Nikolaos Papakonstantinou; [2021]
    Nyckelord :methods: numerical; stars:abundances; stars: atmospheres; stars: statistics; stars:giants; stars:subgiants; stars: open clusters; stars: M67;

    Sammanfattning : In this work, the efficiency of the LUMBA UVES pipeline for processing of spectroscopic observations is tested by use on 23 high-resolution spectra of the open star cluster M67. An abundance trend discovered by Gavel et al. (2019) concerning iron abundances of giant and sub-giant stars of that cluster is examined. LÄS MER

  5. 24. Architecture in the Anthropocene

    Master-uppsats, Lunds universitet/Institutionen för arkitektur och byggd miljö

    Författare :Linnea Pettersson; Anton Rosenberg; [2021]
    Nyckelord :Architecture; Anthropocene; Nature preservation; Built environment; Sustainable architecture; Donna Harraway; Bruna Latour; Gaia; Forccast; Harry Gugger; laba; Anna Tsing; Albena Yaneva; Cosmopolitical design; Norra Ljunghusen; Ljunghusen; Falsterbonäset; Falsterbohalvon; Falsterbo Island; Arts and Architecture;

    Sammanfattning : Imagine your daily surroundings. Imagine your route to work, the busride, the sidewalk, the buildings, the parks, the beaches, the countryside with the agricultural fields. LÄS MER

  7. 25. Archaeologic inspection of the Milky Way using vibrations of a fossil : Seismic, spectroscopic and kinematic characterization of a binary metal-poor Halo star

    Kandidat-uppsats, Uppsala universitet/Observationell astrofysik

    Författare :Amanda Byström; [2020]
    Nyckelord :Milky Way; Halo; galactic archaeology; asteroseismology; binary star; CEMP stars; CEMP-r s stars; stellar age; stellar mass; chemical abundance pattern; Gaia-Enceladus; Gaia-Sausage; Sequoia; spectroscopy; metal-poor;

    Sammanfattning : The Milky Way has undergone several mergers with other galaxies during its lifetime. The mergers have been identified via stellar debris in the Halo of the Milky Way. The practice of mapping these mergers is called galactic archaeology. To perform this archaeologic inspection, three stellar features must be mapped: chemistry, kinematics and age. LÄS MER