Sökning: "Ulrike Heiter"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Ulrike Heiter.

  1. 1. Statistical Methods in Quantitative Spectroscopy of Solar-Type Stars

    Författare :Alvin Gavel; Andreas Korn; Ulrike Heiter; Coryn Bailer-Jones; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astronomy; Astronomi;

    Sammanfattning : Galactic archaeology is the research field that attempts to reconstruct the history of the Milky Way, using primarily the tools of astrometric studies and chemical studies. The latter in turn uses stellar spectroscopy. LÄS MER

  3. 2. Metallicity determination of M dwarfs

    Författare :Sara Lindgren; Ulrike Heiter; Ansgar Reiners; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; stars: low mass - stars: abundances; fundamental parameters - technique: spectroscopic; photometric - planets and satellites: formation;

    Sammanfattning : M dwarfs constitute around 70% of all stars in the local Galaxy. Their multitude together with their long main-sequence lifetimes make them important for studies of global properties of the Galaxy such as the initial mass function or the structure and kinematics of stellar populations. LÄS MER

  4. 3. Galactic archaeology with metal-poor stars

    Författare :Thomas Nordlander; Andreas J. Korn; Karin Lind; Ulrike Heiter; David L. Lambert; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; stars: abundances; radiative transfer; stars: Population II; stars: Population III;

    Sammanfattning : The chemical fingerprints of old, metal-poor stars can be used to unravel the events of the newborn Universe and help us understand the properties of the first stars and star clusters. The study of nearby stars to infer properties in the distant past is often referred to as Galactic archaeology. LÄS MER

  5. 4. Data Reduction and Analysis for Exoplanet Characterization

    Författare :Ansgar Wehrhahn; Nikolai Piskunov; Ulrike Heiter; Nils Ryde; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astronomy; Astronomi;

    Sammanfattning : .... LÄS MER

  7. 5. High Resolution Transmission Spectroscopy of Exoplanets

    Författare :Ansgar Wehrhahn; Nikolai Piskunov; Ulrike Heiter; Jason Wright; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; astronomy; spectroscopy; Astronomy; Astronomi;

    Sammanfattning : A large number of exoplanets has been observed in the last three decades, but still for most of them we know comparatively little about the atmospheres of these distant planets. This is of particular interest as there exist types of planets that don't have an analogy in our own solar system, like hot Jupiters or super Earths. LÄS MER