Sökning: "stellar spectroscopy"

Visar resultat 1 - 5 av 12 uppsatser innehållade orden stellar spectroscopy.

  1. 1. 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

  2. 2. 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

  3. 3. Mapping the present-day chemical abundance structure of the Solar neighbourhood: O & Si

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

    Författare :Kristiina Verro; [2017]
    Nyckelord :astrophysics; stellar spectroscopy; abundance analysis; solar neighbourhood; massive stars; Galaxy; Physics and Astronomy;

    Sammanfattning : Context. Large scale chemical abundance gradients in the Galactic disks, small-scale abundance structures, and the mean chemical abundance values in the Solar vicinity, are important constraints to Galactic chemo-dynamical formation and evolution models. LÄS MER

  4. 4. Investigating inner Galactic Bulge stars through the near infrared

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

    Författare :Hung Shuo Su; [2017]
    Nyckelord :Bulge; Milky Way; Galactic Centre; infrared; spectroscopy; Physics and Astronomy;

    Sammanfattning : Context: The formation of the Galactic Bulge is a topic of active research. There are many scenarios based on observations and Galactic evolution models. The key properties which need to be well constrained observationally are the metallicity distributions of stars and the spatial metallicity gradients. LÄS MER

  5. 5. The Galactic thick disk: a stellar population in its own right?

    Kandidat-uppsats, Uppsala universitet/Observationell astrofysik

    Författare :Vlad Rastau; [2017]
    Nyckelord :High resolution spectroscopy; stellar atmospheres; Galactic stellar populations;

    Sammanfattning : The Galactic disk is home of many billion stars, one of which isour Sun. The stellar population of which the Sun is a member residesin the vertically thin spiral structure of the disk. There is a seconddisk population, the so-called thick disk, that has somewhat dierentspatial, kinematic and chemical properties as compared to the thindisk. LÄS MER

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