Sökning: "Galaxy: nucleus"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden Galaxy: nucleus.

1. 1. Investigating a possible dearth of stars with zero angular momentum in the solar neighbourhood.

   Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Fysiska institutionen

   Författare :Aayush Desai; [2023]
   Nyckelord :Galaxy: disk; Galaxy: fundamental parameters; Galaxy: kinematics and dynamics; Galaxy: nucleus; solar neighborhood; stars: kinematics and dynamics; Physics and Astronomy;

   Sammanfattning : Background. Carlberg & Innanen (1987) first proposed the idea of measuring the solar re- flex velocity (the velocity of the Sun around the galactic centre), Vg,⊙, using the momenta of the stars in the solar neighbourhood. The proposal was a consequence of the work of L. LÄS MER

3. 2. Colliding Galaxies in a (Nut)Shell

   Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Fysiska institutionen

   Författare :Jonathan Petersson; [2022]
   Nyckelord :shell galaxies; simulations; starbursts; quenching; mergers; Physics and Astronomy;

   Sammanfattning : Galaxy interactions and mergers are natural recurring events in the current cosmological paradigm, events that often coincide with starbursts and enhanced star formation activity. To understand why that is, one can use idealised (non-cosmological) merger simulations, which provide freedom to recreate specific tidally distorted galaxies, and analysis of the time evolution and underlying physics of the star formation activity at a high spatial resolution. LÄS MER

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

   Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

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

   Sammanfattning : 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. LÄS MER

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

   Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

   Författare :Teodor Elmfeldt; Filip af Malmborg; [2020]
   Nyckelord :;

   Sammanfattning : 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. LÄS MER

7. 5. Type-1 Active Falactic Nuclei and their Supernovae

   Magister-uppsats, Uppsala universitet/Teoretisk astrofysik

   Författare :Inigo Imaz Chacon; [2019]
   Nyckelord :SN; AGN; supernova; counts; star formation; astronomy; type-1 AGN; obscured; thermonuclear; core-collapsed;

   Sammanfattning : Supernovae (SNe) and more specifically Core-Collapsed SNe (CC SNe) are signatures of on-going star formation (SF), and higher star formation rates. In this project, we perform a study of all SNe ever discovered inside a specific type of galaxy: a type-1 Active Galactic Nucleus (AGN1). LÄS MER