Essays about: "Solar twin"

Showing result 1 - 5 of 7 essays containing the words Solar twin.

  1. 1. Isochrone and chemical ages of stars in the old open cluster M67

    University essay from Uppsala universitet/Observationell astrofysik

    Author : Julia Ahlvind; [2021]
    Keywords : solar twin; Messier 67; M67; open cluster; isochrone; chemical clock;

    Abstract : The open cluster Messier 67 is known to have chemical composition, metallicity and age (~ 4 Gyr) close to the Sun. Therefore, it is advantageous for stellar physical studies and of stellar evolution, in particular for solar like stars within the cluster. READ MORE

  3. 2. High resolution imaging observations of exoplanet host stars

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation

    Author : Kaltrina Kajtazi; [2020]
    Keywords : Speckle imaging; Speckle interferometry; High resolution imaging; Short integration time; Binaries; Exoplant hosts; Stellar properties; WIYN; Gemini; Orbital period; Physical separation; Angular separation; magnitude difference; Physics and Astronomy;

    Abstract : This is a thesis project, analysing data from high-resolution imaging observations, specifically speckle imaging, as a follow up study of exoplanet host stars observed with K2, the second operational phase of the space telescope Kepler. The project was accomplished at NASA Ames research center under the guidance of Rachel A. READ MORE

  4. 3. Planet Engulfment: Do Stars Eat Their Own Children?

    University essay from Uppsala universitet/Teoretisk astrofysik

    Author : Toivo Tuma Niemi; [2019]
    Keywords : Planet Engulfment; Solar Twin; Planet; Star; Planetslukning; Soltvilling; Planet; Stjärna;

    Abstract : Some stars with similar properties to our sun (solar twins) have differ- ent chemical composition than the rest of the solar twins. One explanation might be planet engulfment. Therefore we did a large number of simu- lations where a disturbing star passed a sun and a planet at a distance closer than 100 AU to see how often the planet was engulfed. READ MORE

  5. 4. Chemical composition of giant planet hosts

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation

    Author : Frida Ekstrand; [2017]
    Keywords : chemical composition; planet hosts; stellar twins; differential abundance analysis; Physics and Astronomy;

    Abstract : Does the formation of planets give imprints on the chemical composition of the host star? In order to test this theory a differential abundance analysis (i.e. comparing two stars' abundances to each other) was carried out on a few stars with and without known planets, to see if any differences were found. READ MORE

  6. 5. A differential spectroscopic study of a faint solar twin in the open cluster M67

    University essay from Uppsala universitet/Observationell astrofysik

    Author : Carlos Fernández Ortega; [2016]
    Keywords : Solar twin; difference spectrum; chemical composition; Bessó solar; espectre diferencia; composició química; Soltvilling; differensspektrum; kemisk sammansättning; Gemelo solar; espectro diferencia; composición química;

    Abstract : A solar twin is a star with characteristics very similar to those of the Sun. This is, a Sun-like star. Earlier studies show that M67-1194 is one of the best solar twins found to date. But this star is not exactly like the Sun. READ MORE