Essays about: "stellar variability"

Found 4 essays containing the words stellar variability.

1. 1. The magnetic field of phi Draconis

   University essay from Uppsala universitet/Observationell astrofysik

   Author : Nikolaos Papakonstantinou; [2022]
   Keywords : stars: atmospheres – stars: chemically peculiar – stars: magnetic field – stars: starspots – stars: individual: phi Dra;

   Abstract : Within this past decade, advances in spectropolarimetric analyses allowed mapping surface characteristics of nearby non-resolved stars with unique characteristics. In this study, we attempt mapping of the magnetic field structure and surface distribution of elements for such a star, the magnetic Ap star phi Dra. READ MORE

3. 2. Searching for Exoplanets in K2 Data

   University essay from Luleå tekniska universitet/Rymdteknik

   Author : Iskra Georgieva; [2018]
   Keywords : exoplanets; transit method;

   Abstract : The field of extrasolar planets is undoubtedly one of the most exciting and fast-moving in astronomy. Thanks to the Kepler Space Telescope, which has given us the Kepler and K2 missions, we now have thousands of planets to study and thousands more candidates waiting to be confirmed. READ MORE

4. 3. Investigation of recovery of stellar magnetic field geometries from simulated spectropolarimetric data

   University essay from Uppsala universitet/Institutionen för fysik och astronomi

   Author : Ahmed Al Kanale; [2017]
   Keywords : Magnetic Doppler Imaging MDI code INVERS10;

   Abstract : Powerful remote sensing techniques can covert time variability of polarization profiles of stellar spectral lines into vector magnetic fields maps of stellar surfaces. These techniques are widely applied to interpret observations but have been tested using only simplistic tests. READ MORE

5. 4. A study of power spectral densities of real and simulated Kepler light curves

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

   Author : Holger Weishaupt; [2015]
   Keywords : Exoplanet detection; transit method; stellar variability; light curve simulation; power spectrum; power spectral density estimate;

   Abstract : During the last decade, the transit method has evolved to one of the most promising techniques in the search for extrasolar planets and the quest to find other earth-like worlds. In theory, the transit method is straight forward being based on the detection of an apparent dimming of the host star’s light due to an orbiting planet traversing in front of the observer. READ MORE