Sökning: "Eric Stempels"

Hittade 3 avhandlingar innehållade orden Eric Stempels.

1. 1. Characterising Young Stellar Binaries

   Författare :Per Calissendorff; Markus Janson; Eric Stempels; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Binaries; stellar ages; multiplicity; Astronomy; astronomi;

   Sammanfattning : Stars are dispersed all over the sky within our Galaxy, appearing in large varieties of ages and sizes. How- ever, estimating said traits proves not to always be trivial, but certain circumstances allow us to probe the characteristics of stellar binaries. LÄS MER

3. 2. Debris disks from an astronomical and an astrobiological viewpoint

   Författare :Gianni Cataldi; Alexis Brandeker; Göran Olofsson; Eric Stempels; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; debris disks; planetary systems; exoplanets; astrobiology; circumstellar matter; biomarker; biosignature; extraterrestrial life; Astronomy; astronomi;

   Sammanfattning : In this licentiate thesis, I consider debris disks from an observational, astronomical viewpoint, but also discuss a potential astrobiological application. Debris disks are essentially disks of dust and rocks around main-sequence stars, analogue to the Kuiper- or the asteroid belt in our solar system. LÄS MER

4. 3. Magnetic fields of cool active stars

   Författare :Lisa Rosén; Oleg Kochukhov; Eric Stempels; Andrew Collier Cameron; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; stars: magnetic field; stars: late-type; stars: activity; stars: imaging; polarisation; starspots; Astronomy; Astronomi;

   Sammanfattning : Magnetic fields are present throughout the universe and are very important for many astrophysical processes. Magnetic field influences a star throughout its life and affects nearby objects such as planets. LÄS MER