Sökning: "astroparticle physics"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden astroparticle physics.

1. 1. Simulation-based discrimination of Crab pulsar models with XL-Calibur

   Master-uppsats, KTH/Fysik

   Författare :Dennis Åkerström; [2024]
   Nyckelord :Astroparticle Physics; Astrophysics; Detector Physics; Simulation; Theoretical Physics; Engineering Physics; Pulsar models; Crab pulsar; Astropartikelfysik; Astropartikelfysik; Detektorfysik; Simulering; Teoretisk Fysik; Teknisk Fysik; Pulsar modeller; Krabbpulsaren;

   Sammanfattning : Polarisation of X-ray light is being investigated with polarimeters to extend the borders of what can be observed. Distant compact objects, such as pulsars, that are to small on the sky to be analysed with imaging can be investigated by analysing the polarisation of the emitted light. This can reveal physics previously hidden by their small nature. LÄS MER

3. 2. Investigation of the mean photon energy in Kompaneets spectra

   Master-uppsats, KTH/Fysik

   Författare :Richárd Bagi; [2023]
   Nyckelord :Astroparticle Physics; Kompaneets equation; Astropartikelfysik; Kompaneetsekvationen;

   Sammanfattning : The Kompaneets equation describes the spectrum formation when hot fermions are injected into an opaque fermion-photon plasma in thermal equilibrium and inverse Compton-scatterings occur. The equation has three free parameters, the initial plasma thermal energy θ_u, the final plasmathermal energy θ_r and the average photon energy gain y_r. LÄS MER

4. 3. Single-peaked gamma-ray bursts in the Fermi GBM catalogue

   Master-uppsats, KTH/Fysik

   Författare :Henric Hintze; [2022]
   Nyckelord :astroparticle physics; GBR; gamma-ray burst; single-peaked; single peaked; shock breakout; Fermi; GBM; gamma-ray burst monitor; light curve; low-luminosity; low luminosity; closure relation; astropartikelfysik; GBR; gammablixt; singelpeakad; shockbreakout; Fermi; GBM; gammablixtmonitor; ljuskurva; ljuskurvor; lågluminositets;

   Sammanfattning : Gamma-ray burst light curves are notoriously irregular, yet a significant number consists of a single fast-rising, exponentially decaying pulse. These are called single-peaked light curves. LÄS MER

5. 4. Test and Calibration of CUBES: a CubeSat X-ray Detector

   Master-uppsats, KTH/Fysik

   Författare :Caroline Holmberg; [2022]
   Nyckelord :Applied Physics; Astroparticle Physics; Tillämpad fysik; Astropartikelfysik;

   Sammanfattning : CUBES is an X-ray detector that will be placed aboard the KTH 3U CubeSat mission, MIST. Its purpose is to detect high energy X-rays as well as to test various components in a space environment. Two CUBES will be placed on the satellite. Each CUBES consists of a printed circuit board (PCB) with three multi pixel photon counters (MPPCs). LÄS MER

7. 5. Simulating and Testing the Polarimetric Response of the X-ray Polarimetry Telescope XL-Calibur

   Master-uppsats, KTH/Fysik

   Författare :Filip af Malmborg; [2022]
   Nyckelord :Astroparticle Physics; Astrophysics; Detector Physics; Simulation; Theoretical Physics; Engineering Physics; Astropartikelfysik; Astropartikelfysik; Detektorfysik; Simulering; Teoretisk Fysik; Teknisk Fysik;

   Sammanfattning : X-ray polarimetry, the study of the polarisation of X-ray light, is a powerful and rapidly developing tool for astrophysics, which promises to help answer outstanding questions about the physics of extreme objects such as pulsars, X-ray binaries and active galactic nuclei. The balloon-borne telescope XL-Calibur will be the first instrument to study the polarisation of hard X-rays (with energies between 10 and 100 keV) in detail, correlating with the soft X-ray observations of IXPE to provide further tests of polarisation-dependent x-ray emission models in extreme objects. LÄS MER