Sökning: "High-resolution spectroscopy"

Visar resultat 1 - 5 av 25 uppsatser innehållade orden High-resolution spectroscopy.

  1. 1. Detailed chemical abundances of neutron-capture elements - from 523 local giant stars

    Master-uppsats, Lunds universitet/Astronomi

    Författare :Rebecca Forsberg; [2019]
    Nyckelord :The Milky Way galaxy; Abundances; High-resolution spectroscopy; Neutron-capture elements; Physics and Astronomy;

    Sammanfattning : Purpose: The purpose of this work is to determine the abundances of neutron-capture elements in solar neighborhood giant stars. This enables constraints to be put on the the cosmic origin of these elements. LÄS MER

  2. 2. Aerosol Input and Snow Accumulation Rates on the Northern Greenland Ice Sheet : Reconstructed by means of Continuous Flow Analysis (CFA) of 6 shallow firn cores

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Patrick Stephan Zens; [2018]
    Nyckelord :continuous flow analysis; Greenland; shallow firn core; aerosol; snow accumulation; glaciochemistry; kontinuerlig flödesanalys; Grönland; grunda firnkärnor; aerosol; snöackumulering; glaciokemi;

    Sammanfattning : Ice, firn and snow cores from the Greenland ice sheet offer a unique opportunity to reconstruct past climate conditions. These can be analyzed with continuous flow analysis (CFA) in order to acquire proxy information about ancient atmospheric aerosol concentrations, snow accumulation rates or temperature variations, atmospheric composition, solar activity as well as volcanism and biological activity. LÄS MER

  3. 3. Abundances of iron-peak elements in disk and bulge giant stars from high-resolution optical spectra

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

    Författare :Maria Lomaeva; [2018]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : Context. The formation and evolution of the Galactic bulge and the Milky Way is still a debated subject. Observations of, e.g. LÄS MER

  4. 4. Investigating super-Eddington accretion flows in Ultraluminous X-ray sources

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Andrés Gúrpide Lasheras; [2018]
    Nyckelord :Accretion; X-ray binaries; Black holes; Neutron Stars; Ultraluminous X-ray sources;

    Sammanfattning : It is now widely known that most of the large galaxies we observe (e.g. the Milky Way) host in their center a supermassive black hole ($10^{6}-10^{9}$ $M_\odot$). LÄS MER

  5. 5. Spectral investigation of the globular cluster M30

    Master-uppsats, Uppsala universitet/Observationell astrofysik

    Författare :Scheutwinkel Kilian Hikaru; [2018]
    Nyckelord :M30; globular cluster; spectroscopy;

    Sammanfattning : Globular cluster studies suggest that a signature in the spectra of RGB stars in a globular cluster are anti-correlations in Mg-Al and Na-O. In this work, a small sample of 12 RGB stars of the globular cluster M30 is investigated using VLT-UVES high-resolution spectrograph. LÄS MER