Essays about: "stellar populations"
Showing result 1 - 5 of 28 essays containing the words stellar populations.
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1. What limits the luminosity of red supergiants?
University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionenAbstract : The observed upper limit of the luminosity of red supergiants, often called the Humphreys-Davidson limit, has recently been shown to be independent of metallicity and to not be explainable by single star evolution – findings that both contradict established ideas of the origins of the limit. It is now known that the vast majority of stars with sufficient mass to possibly evolve into red supergiants above the limit interact with companion stars at some point during their lives. READ MORE
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2. Lithium abundances through distinct stellar populations in Omega Centauri
University essay from Uppsala universitet/Institutionen för fysik och astronomiAbstract : The renowned Omega Centauri (NGC 5139) is one of the most massive and complex known globular clusters in terms of multiple populations. In this project, we aim to investigate the chemical abundance of lithium in RBG stars in this cluster in pursuit of unraveling the that govern the formation of these distinct populations. READ MORE
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3. The chemical evolution of the Milky Way: pushing APOGEE to higher precision and accuracy
University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionenAbstract : In the recent decade, a rapid increase in all-sky spectroscopic surveys has occurred, and with it, the wealth of observational data and information on our Galaxy. Consequently, numerous detections of new structures, such as new open clusters, accreted and in-situ components, are discovered. READ MORE
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4. Origin of blue straggler stars in the Milky Way halo
University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionenAbstract : Blue straggler stars (BSSs) are exotic stellar objects that appear to be younger than the age of the population they come from suggests. They are observed as the extension of the main sequence stars, beyond the turn-off point. READ MORE
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5. Can Dwarf Galaxies Tell Us How the Milky Way Formed?
University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionenAbstract : Dwarf galaxies are a key component in understanding the evolution of galaxies and provide tests on the standard cosmological $\Lambda$ Cold Dark Matter model. According to the formation hierarchy, dwarf galaxies are the pieces that create all galaxies. Our current understanding of dwarf galaxies faces discrepancies between theory and observations. READ MORE