Essays about: "luminosity"

Showing result 1 - 5 of 68 essays containing the word luminosity.

1. 1. The visibility of stellar transients in the Galactic Centre

   University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Astrofysik

   Author : Jonathan Ström; [2024]
   Keywords : Physics and Astronomy;

   Abstract : A semi-analytical simulation was developed to evaluate the K-band magnitudes of Red Giants [0.96 - 1.02 M⊙] orbiting the supermassive black hole in the galactic centre. The model assumed star formation between 10-12 Gyrs ago and by following the IMF and applying a random age condition, a stellar population was created. READ MORE

3. 2. Non-linear effects in the ATLAS track-counting luminosity measurement

   University essay from Uppsala universitet/Högenergifysik

   Author : Daniel Gautam; [2023]
   Keywords : Particle physics; CERN; ATLAS; Track counting; Luminosity; Monte Carlo; Track Selection;

   Abstract : In this thesis the linearity of the ATLAS track-counting luminosity measurement is studied using two different sets Monte Carlo simulated crossings of proton-proton bunches. A primary high-momentum, or hard, interaction must be chosen for the Monte Carlo simulation. READ MORE

4. 3. Starshades: Geoengineering Solutions and Technosignatures in Direct Imaging Phase Curves

   University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

   Author : Claudia Skoglund; [2023]
   Keywords : Starshades; extraterrestrial intelligence; stellar evolution; technosignatures; phase curves; direct imaging; habitable zone.; Physics and Astronomy;

   Abstract : The stellar luminosity increases as a star evolves which inevitably yields a higher temperature on planets in orbit around the star. It is reasonable to assume that intelligent civilizations would tackle this issue through installing artificial structures that can alter the radiation received by the planet. READ MORE

5. 4. What limits the luminosity of red supergiants?

   University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

   Author : Eric Svensson; [2023]
   Keywords : Stellar evolution; Red supergiants; Red giants; Luminosity; Binary stars; Binary star systems; Binary star interactions; Binary stellar evolution; Humphreys-Davidson limit; Upper luminosity limit; BSE; Population synthesis; Simulations; M31; LMC; SMC; Metallicity; Mass transfer; Merging; Physics and Astronomy;

   Abstract : 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

6. 5. Laser Metrology for assembly of ATLAS ITk-Strips

   University essay from Uppsala universitet/Institutionen för materialvetenskap

   Author : Jonathan Arvin; Johannes Berg Wallin; Hugo Eskner; Olof Lindman Jardfelt; [2023]
   Keywords : Laser metrology; ATLAS; Inner Tracker ITk ; Micro Epsilon;

   Abstract : The ATLAS detector at CERN's Large Hadron Collider has been instrumental in scientific discoveries,including the Higgs particle. As part of the High Luminosity (HL) upgrade, the current Inner Detector (ID) isbeing replaced by the new IInner Tracker (ITk), and Uppsala University is collaborating with industrypartner NOTE to produce around 700 modules for the ITk. READ MORE