Sökning: "Variable stars"

Visar resultat 1 - 5 av 18 uppsatser innehållade orden Variable stars.

  1. 1. Planes of satellite galaxies

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Jessica Laura Erika Kocher; [2022]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : The Planes of Satellites Problem is an open question within the field of galaxy formation. It is based on the observations that the Milky Way's satellites, as well as those around the Andromeda (M31) galaxy, align in planes. LÄS MER

  3. 2. Spectroscopic determination of stellar parameters to constrain atomic diffusion in the old open cluster M67

    Kandidat-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Fabian Lundell; [2022]
    Nyckelord :;

    Sammanfattning : In an attempt to check published results on diffusion effects in M67 a non-LTE analysis is made on 28 high resolution FLAMES-UVES spectra of dwarfs and sub-giants around the turnoff point, where core hydrogen fusion halts. This analysis utilizes the software-suites LOTUS and iSpec to determine stellar parameters from equivalent-width measurements. LÄS MER

  4. 3. Development of a tool to analyze back-focus characteristics of fix-focal cameras

    Master-uppsats, Lunds universitet/Innovation

    Författare :Björn Lind; [2022]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Fix-focal cameras require careful alignment of the sensor relative to the lens during assembly in order to produce a sharp image. Axis developed wide- and fish-eye network cameras are, for a number of reasons, focused at infinity when aligned. LÄS MER

  5. 4. Spectroscopic model characterisation of hot exoplanet atmospheres

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Fysiska institutionen

    Författare :Elin Sandvik; [2022]
    Nyckelord :Transit method; Transmission spectroscopy; Exoplanets; Hot Jupiter; Modelling; Physics and Astronomy;

    Sammanfattning : Hot Jupiters are gas giants under intense stellar radiation with short orbital periods of only a few days. Due to their large radii, hot temperatures, and large scale heights, hot Jupiters can be observationally characterised in detail through spectroscopy over an entire orbital phase. LÄS MER

  7. 5. Investigation of variable Ap Stars in TESS continuous viewing zone

    Master-uppsats, Uppsala universitet/Observationell astrofysik

    Författare :Nikolaos Papakonstantinou; [2021]
    Nyckelord :stars: chemically peculiar; stars: magnetic fields; stars: variables; techniques: photometric; stars: early-type; stars: magnetic fields; stars: rotation;

    Sammanfattning : .... LÄS MER