Sökning: "stellar evolution"

Visar resultat 21 - 25 av 72 uppsatser innehållade orden stellar evolution.

1. 21. Post-Main Sequence Habitability for Outer Solar System Moons

   Master-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

   Författare :Viktor Sparrman; [2022]
   Nyckelord :Habitability; Habitable Zone; Greenhouse Effect; Outer moons; Red Giant Branch; Horizontal Branch; Asymptotic Giant Branch; solar evolution;

   Sammanfattning : The search for extra-terrestrial life is guided by the classification of promising candidate worlds. In this classification the habitable zone acts as a measure for the perceived habitability of a circumstellar body. Habitable zone definitions vary between using a conservative and an optimistic limit. LÄS MER

3. 22. Dwarf Galaxies in the Galactic Potential as probes of its internal structure

   Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

   Författare :Arn Marklund; [2022]
   Nyckelord :Numerical integration; Stellar Streams; Dwarf Galaxies; Dark Matter; Physics and Astronomy;

   Sammanfattning : Satellite galaxies on bound orbits around the Milky Way (MW) are constantly subject to tidal forces from the MW. If the tidal forces are large enough, they may strip the outermost stars of the satellite, that in turn distribute themselves in long elongated stellar streams. LÄS MER

4. 23. The visibility of double neutron star binaries to LISA

   Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

   Författare :Anatole Storck; [2021]
   Nyckelord :gravitational waves; LISA; neutron stars; orbital simulations; Runge-Kutta method; Physics and Astronomy;

   Sammanfattning : Double neutron star binaries (DNSBs) in the mHz gravitational wave (GW) regime are an important group of objects which the GW detector LISA will be able to observe. The detection and parametrization of these objects will help develop our current understanding of neutron star formation and evolution. LÄS MER

5. 24. Towards a high resolution view of infrared line formation

   Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

   Författare :Martin Schmidt Montelius; [2021]
   Nyckelord :Spectroscopy; Near infrared; K giants; Galactic archeaology; Galactic chemical evolution; Abundances; Milky Way; Physics and Astronomy;

   Sammanfattning : Observing in the infrared has many benefits, such as seeing through the interstellar dust in the galaxy, easier use of adaptive optics, and better flux ratios for direct observations of exoplanets. Before the infrared spectral range can be utilised for highly accurate stellar spectroscopy there is a need for a better understanding of both stellar modelling and the atomic physics that go into forming spectral lines. LÄS MER

7. 25. The Milky Way and its Exoplanets

   Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

   Författare :Jesper Nielsen; [2021]
   Nyckelord :Planets and Satellites; Exoplanets; Occurrence Rates; Physics and Astronomy;

   Sammanfattning : The detections of over 4000 exoplanets as of today has shown that they exist in a wide range of different configurations, otherwise known as architectures. Recently, studies have been made trying to link the environment of host stars to the architectures of their planetary systems and have found that the architectures of planetary systems may not necessarily be uniform in the Milky Way. LÄS MER