Sökning: "Brian Thorsbro"

Hittade 1 uppsats innehållade orden Brian Thorsbro.

  1. 1. A kinematic check of the distance scale of Galactic Cepheids

    Kandidat-uppsats, Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation; Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Brian Thorsbro; [2014]
    Nyckelord :cepheid; period-luminosity relation; distance scale; kinematics; Physics and Astronomy;

    Sammanfattning : A selection of well known period luminosity relations for cepheid variables are studied under the assumption that cepheid variables have a mean vertical velocity of zero in the galactic plane. Proper motion data from Hipparcos and Thyco-2 catalogues are coupled with the distances obtained from applying the period luminosity relations on a database of known classical cepheids to calculate the velocities of the cepheids. LÄS MER