Essays about: "AGB stars"

Showing result 6 - 10 of 12 essays containing the words AGB stars.

  1. 6. Detailed chemical abundances of neutron-capture elements - from 523 local giant stars

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation

    Author : Rebecca Forsberg; [2019]
    Keywords : The Milky Way galaxy; Abundances; High-resolution spectroscopy; Neutron-capture elements; Physics and Astronomy;

    Abstract : Purpose: The purpose of this work is to determine the abundances of neutron-capture elements in solar neighborhood giant stars. This enables constraints to be put on the the cosmic origin of these elements. READ MORE

  3. 7. Pulsation Properties in Asymptotic Giant Branch Stars

    University essay from Uppsala universitet/Teoretisk astrofysik

    Author : Ofelia Norgren; [2019]
    Keywords : Astronomy; Asymptotic Giant Branch stars; Stellar Evolution; Variable Stars; Power Spectrum;

    Abstract : Asymptotic Giant Branch (AGB) stars are stars with low- to intermediate mass in a late stage in their stellar evolution. An important feature of stellar evolution is the ongoing nucleosynthesis, the creation of heavier elements. READ MORE

  4. 8. The Variability of the R Magnitude in Dynamical Models of AGB Stars

    University essay from Uppsala universitet/Teoretisk astrofysik

    Author : Roisin Brogan; [2019]
    Keywords : stars: AGB; stars: late-type; stars: atmospheres; stars: variable;

    Abstract : This report will first give a brief background on asymptotic giant branch (AGB) stars and the characteristics that make them interesting to study. Some methods and tools used in the field are then introduced, before the photometric variability of these stars is investigated. READ MORE

  5. 9. The status of neutron-capture elements according to Gaia-ESO.

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation

    Author : Linnéa Strandell; [2017]
    Keywords : Neutron-capture elements; Gaia-ESO; Milky Way field stars; Physics and Astronomy;

    Abstract : The aim of this thesis is to get a better understanding of the evolution of the Milky Way stellar disc by looking at the abundance ratios for neutron-capture elements in thin and thick disc stars. In this project the formation of our Galaxy’s thin and thick disc was studied by analysing 10 different neutron-capture elements in field stars measured by Gaia-ESO. READ MORE

  6. 10. Molecular gas around the binary star R Aquarii

    University essay from Uppsala universitet/Institutionen för fysik och astronomi

    Author : Terese Olander; [2017]
    Keywords : R Aquarii; R Aqr; circumstellar envelope; CSE; CO;

    Abstract : At the end of the lives of low- to intermediate mass stars they can be found on the asymptotic giant branch (AGB). The AGB phase ends when the entire circumstellar envelope (CSE) is blown away in a superwindphase, in the end creating a planetary nebula. It is unknown what shapes the CSE and the planetary nebula. Binarity is a favored theory. READ MORE