Sökning: "neutron stars"

Visar resultat 21 - 25 av 29 uppsatser innehållade orden neutron stars.

1. 21. Study of the in-flight calibration of theSVOM/ECLAIRs instrument

   Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Författare :Jakob Östberg; [2020]
   Nyckelord :Telescope; calibration; gamma-ray; burst; ECLAIRs; SVOM; IRAP;

   Sammanfattning : The Space based multi-band Variable astronomical Object Monitor (SVOM) is a x- andgamma-ray telescope with the primary objective of observing gamma-ray bursts. Themission is a cooperation between the French and Chinese space agencies and will be launchedin 2021. LÄS MER

3. 22. Detailed chemical abundances of neutron-capture elements - from 523 local giant stars

   Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

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

   Sammanfattning : 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. LÄS MER

4. 23. The astronomical consequences of primordial black holes

   Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

   Författare :Loke Lönnblad Ohlin; [2019]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : 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. LÄS MER

5. 24. Investigating super-Eddington accretion flows in Ultraluminous X-ray sources

   Master-uppsats, Luleå tekniska universitet/Rymdteknik

   Författare :Andrés Gúrpide Lasheras; [2018]
   Nyckelord :Accretion; X-ray binaries; Black holes; Neutron Stars; Ultraluminous X-ray sources;

   Sammanfattning : It is now widely known that most of the large galaxies we observe (e.g. the Milky Way) host in their center a supermassive black hole ($10^{6}-10^{9}$ $M_\odot$). LÄS MER

7. 25. The status of neutron-capture elements according to Gaia-ESO.

   Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

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

   Sammanfattning : 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. LÄS MER