Sökning: "Collisional broadening"

Hittade 2 uppsatser innehållade orden Collisional broadening.

  1. 1. Collisional broadening by hydrogenfor stellar spectroscopy : extension towards high-lying states

    Kandidat-uppsats, Uppsala universitet/Teoretisk astrofysik

    Författare :Adam Hultquist; [2019]
    Nyckelord :Astrophysics; Spectral line broadening; ABO; Collisional broadening;

    Sammanfattning : The object of this thesis is to extend the current tables for two useful quantities when calculatingcollisional broadening, the cross-section of interaction and the velocity parameter.These quantities, which have hitherto been tabulated for lower states, have now been calculatedfor higher lying states and are used in the ABO - model for spectral line broadening. LÄS MER

  3. 2. Broadening of spectral lines in the Gaia-ESO survey

    Kandidat-uppsats, Uppsala universitet/Teoretisk fysik

    Författare :Kristoffer Bengtsson; [2018]
    Nyckelord :Astronomy; Hydrogen; Iron; Spectral line broadening; collisional broadening; pressure broadening; Gaia; Stellar atmosphere; spectrum; stars: abundances; Atomic data; Astronomi; tryckbreddning; kollisionsbreddning; breddning av spektrallinjer; spektrum; väte; järn; Gaia; stjärnatmosfär; atomdata;

    Sammanfattning : Analyzing stellar spectra plays a big role in understanding the evolution of our galaxy. Having good data for spectral line properties is very important when analyzing these spectra. One part of the Gaia-ESO public spectroscopic survey (GES) is to gather data for spectral line properties from stellar spectra. LÄS MER