Essays about: "Galaxy: disk"

Showing result 16 - 20 of 32 essays containing the words Galaxy: disk.

  1. 16. Analysis of stellar spectra with machine learning

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

    Author : Alvaro Segovia Otero; [2020]
    Keywords : Galactic Archaeology; machine learning; chemical abundances; FGK stars; Physics and Astronomy;

    Abstract : Researchers in the field of Galactic Archaeology have entered the era of industrial revolution. Upcoming surveys are planning on observing tens of millions of stars and high precision and accuracy must be ensured when deriving their stellar parameters and elemental abundances. READ MORE

  3. 17. Accurate Abundances of Giant Stars in the Local disk: A manual analysis of IR APOGEE spectra

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

    Author : Ivalu Barlach Christensen; [2020]
    Keywords : Galactic Chemical Evolution; Astrophysics; Astronomy; IR Spectroscopy; Milky Way; Abundance; Physics and Astronomy;

    Abstract : Purpose: In order to study the Galactic Chemical Evolution, elemental abundances are needed. The purpose of this work is to investigate the chemical evolution of the Milky Way by determining several elemental abundances of giants in the local disk. READ MORE

  4. 18. Original: X-ray Spectral Analysis of a Serendipitously Observed Active Galactic Nucleus

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Teodor Elmfeldt; Filip af Malmborg; [2020]
    Keywords : ;

    Abstract : An active galactic nucleus (AGN) is a region in the center of a galaxy with a supermassive black hole continuosly accreting material. This accretion gives rise to large amounts of radiation across the whole electromagnetic spectrum, and largely affects the regions around the AGN and the evolution of the whole galaxy. READ MORE

  5. 19. From the bulge region to the outer disk: Tracing the α-enhancement level in the Galactic thin and thick disks

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation

    Author : Elin Sandvik; [2020]
    Keywords : Chemical abundance; star formation rate; initial-mass function; APOGEE; Milky Way; Physics and Astronomy;

    Abstract : One of the biggest mysteries astronomers wish to unveil is the formation and evolution of galaxies. Properties of our own galaxy, the Milky Way, can provide great insight into these. The star formation rate (SFR) and whether it varies with distance from the galactic centre (GC), is one of these properties. READ MORE

  6. 20. 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