Essays about: "stellar twins"
Found 5 essays containing the words stellar twins.
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1. Isochrone and chemical ages of stars in the old open cluster M67
University essay from Uppsala universitet/Observationell astrofysikAbstract : 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
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2. Planet Engulfment: Do Stars Eat Their Own Children?
University essay from Uppsala universitet/Teoretisk astrofysikAbstract : 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
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3. Detailed analysis of the chemical composition of stars harboring Earth-like planets
University essay from Lunds universitet/Astronomi - Genomgår omorganisationAbstract : Context. The planet-metallicity correlation for gaseous giants is widely accepted through spectroscopic studies. However, whether a similar correlation exists for terrestrial planets is a debated subject. READ MORE
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4. Chemical composition of giant planet hosts
University essay from Lunds universitet/Astronomi - Genomgår omorganisationAbstract : 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
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5. Chemical abundances in main-sequence stars in open cluster M67
University essay from Teoretisk astrofysikAbstract : The discovery of a solar twin in the open star cluster M67 (Önehag et al. 2011) implies a near-solar chemical composition for the cluster. READ MORE