Essays about: "Galactic Centre"

Found 5 essays containing the words Galactic Centre.

  1. 1. Making Hypervelocity Stars

    University essay from Lunds universitet/Astronomi

    Author : Frans Forsberg; [2020]
    Keywords : Stellar Dynamics; Binary Stars; Galactic Centre; Binary Relaxation; Physics and Astronomy;

    Abstract : In this thesis, I investigate if the binaries that are being tidally disrupted by means of the Hills mechanism, producing hypervelocity stars, could have been transported to the galactic centre by two-body scattering. To survive a scattering event, the binary must be hard, meaning that the binding energy of the binary is higher than the kinetic energy of the collider. READ MORE

  2. 2. 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

    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

  3. 3. The astronomical consequences of primordial black holes

    University essay from Lunds universitet/Astronomi

    Author : Loke Lönnblad Ohlin; [2019]
    Keywords : Physics and Astronomy;

    Abstract : In the radiation or early matter dominated eras of the Universe, there is a theoretical possibility for the formation of black holes (BHs). These primordial black holes (PBHs) have been thought of as a possible candidate for dark matter (DM), and an attractive one at that as it would explain DM using only baryonic physics. READ MORE

  4. 4. Investigating inner Galactic Bulge stars through the near infrared

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

    Author : Hung Shuo Su; [2017]
    Keywords : Bulge; Milky Way; Galactic Centre; infrared; spectroscopy; Physics and Astronomy;

    Abstract : Context: The formation of the Galactic Bulge is a topic of active research. There are many scenarios based on observations and Galactic evolution models. The key properties which need to be well constrained observationally are the metallicity distributions of stars and the spatial metallicity gradients. READ MORE

  5. 5. Analysis of the high-energy emission of the BL Lac PKS 2155-304 with Fermi-LAT data

    University essay from Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

    Author : Tobias Möllerström; [2015]
    Keywords : Active Galactic Nuclei; PKS 2155-304; Fermi-LAT; H.E.S.S.; Very High Energy Gamma radiation;

    Abstract : Some of the most interesting objects in the Universe are Active Galactic Nuclei. In the centre of an active galaxy is a supermassive black hole that accretes matter from the surrounding galaxy. In the process, not yet fully understood, some of the matter is ejected in two jets, perpendicular to the plane of the galaxy. READ MORE