Advanced search

Found 4 essays matching the above criteria.

  1. 1. Measuring the Characteristic Sizes of Convection Structures in AGB Stars with Fourier Decomposition Analyses : the Stellar Intensity Analyzer (SIA) Pipeline.

    University essay from Uppsala universitet/Teoretisk astrofysik

    Author : Miquel Colom i Bernadich; [2020]
    Keywords : Asymptotic Giant Branch; AGB; red giants; stars; stellar convection; Fourier analysis; convection cells;

    Abstract : Context. Theoretical studies predict that the length scale of convection in stellar atmospheres isproportional to the pressure scale height, which implies that giant and supergiant stars should have convection granules of sizes comparable to their radii. READ MORE

  3. 2. Spectroscopy of the Globular Cluster M30

    University essay from Uppsala universitet/Observationell astrofysik

    Author : Kilian Hikaru Scheutwinkel; [2019]
    Keywords : Spectroscopy; Globular Cluster; M30;

    Abstract : Globular Clusters contain very old metal-poor stars in different evolutionary stages evolved from the same primordial cloud. Signatures of atomic in stellar interiors are studied in the metal-poor GC M30. Furthermore, traces of cluster internal pollution depleting alpha elements e.g. READ MORE

  4. 3. Searching for Exoplanets in K2 Data

    University essay from Luleå tekniska universitet/Rymdteknik

    Author : Iskra Georgieva; [2018]
    Keywords : exoplanets; transit method;

    Abstract : The field of extrasolar planets is undoubtedly one of the most exciting and fast-moving in astronomy. Thanks to the Kepler Space Telescope, which has given us the Kepler and K2 missions, we now have thousands of planets to study and thousands more candidates waiting to be confirmed. READ MORE

  5. 4. Spectral investigation of the globular cluster M30

    University essay from Uppsala universitet/Observationell astrofysik

    Author : Scheutwinkel Kilian Hikaru; [2018]
    Keywords : M30; globular cluster; spectroscopy;

    Abstract : 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. READ MORE