Essays about: "Stellar Temperature"

Showing result 16 - 20 of 29 essays containing the words Stellar Temperature.

  1. 16. Detailed analysis of the chemical composition of stars harboring Earth-like planets

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation

    Author : Lorena Acuña Aguirre; [2019]
    Keywords : Physics and Astronomy;

    Abstract : 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

  3. 17. Hunting for Dark Stars with the James Webb Space Telescope

    University essay from Uppsala universitet/Institutionen för fysik och astronomi

    Author : Josefine Nittler; [2018]
    Keywords : Dark stars; James Webb Space Telescope; JWST;

    Abstract : The first stars in the Universe are thought to have formed in high dark matter density minihalos about 200 million years after the Big Bang. If these stars were able to contract dark matter into their stellar core while forming, some of them might have turned into dark stars (DSs) powered by the heat from dark matter annihilation. READ MORE

  4. 18. Potassium in the Galactic thin and thick discs

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation

    Author : Carina Norregaard; [2018]
    Keywords : Physics and Astronomy;

    Abstract : To understand the evolution of our galaxy, the chemical abundance patterns and trends within the stars of the different regions are explored. The process of synthesizing these elements reveals key details about the way the stars and, therefore, the galaxy formed. READ MORE

  5. 19. Nucleosynthesis in accretion disks around black holes

    University essay from Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation; Lunds universitet/Astronomi - Genomgår omorganisation

    Author : Neige Frankel; [2017]
    Keywords : accretion disk; Nucleosynthesis; black hole; high energy; white dwarf tidal disruption; Physics and Astronomy;

    Abstract : Nucleosynthesis is the mechanism which produces new elements in nuclear reactions. Nuclear reaction rates are highly temperature dependant, and nuclear reactions take place in very hot environments. Current theories predict that the light elements such as hydrogen and helium were produced during the Big Bang. READ MORE

  6. 20. 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