Sökning: "exoplanet"

Visar resultat 16 - 20 av 41 uppsatser innehållade ordet exoplanet.

1. 16. Have Radial Velocity Surveys Missed Any Planets?

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

   Författare :Shah Raj; [2021]
   Nyckelord :radial velocity survey; transit method; exoplanet; habitable zone; habitable zone boundaries; HZ; early Mars; recent Venus; stability; instability; chaos; REBOUND; MEGNO; MEGNO maps; Hill sphere; stable systems; unstable systems; Physics and Astronomy;

   Sammanfattning : The project was aimed at numerically assessing exoplanetary systems to distinguish their capabilities of hosting additional planets. The shortcomings of the radial velocity method sometimes causes hindrance in the detection of terrestrial planets. LÄS MER

3. 17. Detecting Earth-like exoplanets using high-dispersion nulling interferometry

   Master-uppsats, KTH/Tillämpad fysik

   Författare :Germain Garreau; [2021]
   Nyckelord :Applied Physics; Instrumental Optics; Exoplanets Detection; Interferometry; Spectroscopy; Tillämpad fysik; Instrumentoptik; Exoplaneter upptäckt; Interferometri; Spektroskopi;

   Sammanfattning : The detection of Earth-like exoplanets and the characterization of their atmospheres is a challenge one needs to solve to assess their habitability and the presence of life in the universe. If this challenge is still unresolved today, even in the era of giant telescopes, it is mainly because of the very high contrast between these exoplanets and their host star and also their proximity. LÄS MER

4. 18. Planning Observations of Terrestrial ExoplanetsAround M Type Stars with CRIRES+

   Master-uppsats, Uppsala universitet/Observationell astrofysik

   Författare :Jonas Zbinden; [2021]
   Nyckelord :;

   Sammanfattning : In recent decades, thousands of exoplanets have been discovered. The next step is to characterize theobserved planets in terms of their radii, masses, density, physical conditions and composition of theiratmospheres. LÄS MER

5. 19. Advanced Characterization of Exoplanet Host Stars

   Master-uppsats, Uppsala universitet/Observationell astrofysik

   Författare :Khaled Al Moulla; [2020]
   Nyckelord :stars: exoplanet hosts - fundamental parameters - spectroscopy: HARPS - SME; stjärnor: exoplanetvärdar - fundamentala parametrar - spektroskopi: HARPS - SME;

   Sammanfattning : The spectroscopic determination of stellar properties is important for subsequent studies of exoplanet atmospheres. In this thesis, HARPS data for 6 exoplanet-hosting, late-type stars is processed to achieve an average signal-to-noise ratio of ~105. LÄS MER

7. 20. High resolution imaging observations of exoplanet host stars

   Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

   Författare :Kaltrina Kajtazi; [2020]
   Nyckelord :Speckle imaging; Speckle interferometry; High resolution imaging; Short integration time; Binaries; Exoplant hosts; Stellar properties; WIYN; Gemini; Orbital period; Physical separation; Angular separation; magnitude difference; Physics and Astronomy;

   Sammanfattning : This is a thesis project, analysing data from high-resolution imaging observations, specifically speckle imaging, as a follow up study of exoplanet host stars observed with K2, the second operational phase of the space telescope Kepler. The project was accomplished at NASA Ames research center under the guidance of Rachel A. LÄS MER