Sökning: "Young stars"

Visar resultat 1 - 5 av 38 avhandlingar innehållade orden Young stars.

  1. 1. Young stars and outflows : case studies of three different regions

    Författare :Magnus Gålfalk; Göran Olofsson; Klaus Werner Hodapp; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Star formation; Young stars; Outflows; Astronomy; Astronomi; Astronomy; astronomi;

    Sammanfattning : Mass is clearly the most important parameter of a star as it determines the phases it will go through, its physical parameters, the elements produced and its life span. Two important processes that occur simultaneously in young stars are directly related to the final mass a star ends up with; the accretion of material onto the star from a circumstellar disk and the bipolar outflow of material from the star. LÄS MER

  3. 2. Young stars and circumstellar disks

    Författare :Alexis Brandeker; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Young stars; circumstellar disks; Stjärnor;

    Sammanfattning : .... 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

  5. 4. 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

  7. 5. A spectral investigation of young late-type stars

    Författare :Gösta F. Gahm; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER