Essays about: "5 STar"
Showing result 1 - 5 of 79 essays containing the words 5 STar.
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1. Measuring copper abundances in the Galactic Bulge
University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionenAbstract : Context: The chemical evolution of Cu in the Galactic bulge have been studied in a few studies using red giant branch stars, but the ages of individual red giant stars are difficult to determine. In addition, the bulge has been a challenging region of the Milky Way galaxy to obtain high-resolution spectra of stars, except when observing through certain few small fields into the bulge that are known to have low extinction. READ MORE
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2. 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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3. Investigation of fuel and water injection in gas turbine combustion : Evaluate the methodologies available in Star CCM+ for modeling of water injection in simplified combustor using liquid and gas fuels
University essay from Linköpings universitet/Mekanisk värmeteori och strömningsläraAbstract : The negative impact of gas turbine emissions on the environment and human health is a growing concern. Recent studies suggest injecting water into the combustion process effectively reduces emissions and increases power output. However, this approach presents new challenges that need to be thoroughly investigated. READ MORE
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4. What happened to R-star? : Estimating the natural rate of interest in Sweden in unconventional times
University essay from Umeå universitet/NationalekonomiAbstract : This study estimates the natural rate of interest in Sweden using two different models. One state-space model introduced by Holston et al. (2017b) and one vector autoregression model with time-varying parameters (TVP-VAR). The TVP-VAR model is then used to produce a forecast of the real interest rate 5 years out, for every point in time. READ MORE
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5. Simulations of the Tenuous Upper Atmospheres of Exoplanets
University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionenAbstract : Over the last decade, the interest in research on extraterrestrial planets has expanded dramatically. With the number of confirmed exoplanets having increased tenfold over the last ten years, we now know that many different types of exoplanets exist. READ MORE
