Sökning: "dvärgen"

Hittade 2 avhandlingar innehållade ordet dvärgen.

  1. 1. Dynamics and Atomic Processes in the Symbiotic Star AG Peg as Derived from Its Emission Line Spectrum

    Författare :Mattias Eriksson; Astronomi - Genomgår omorganisation; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astronomi; rymdvetenskap; kosmisk kemi; cosmic chemistry; space research; Astronomy; Atom- och molekylärfysik; Atomic and molecular physics; Symbiotic stars; Fluorescence; Atomic processes;

    Sammanfattning : The spectra of symbiotic stars are shown to frequently contain numerous fluorescence lines caused by Photo-excitation by Accidental Resonance (PAR). So far, most work involving fluorescence in stellar spectra has been assigned to the search of new PAR mechanisms, which can explain the presence of certain emission lines. LÄS MER

  3. 2. Inside Pulsating White Dwarfs: Clues from time-resolved spectroscopy

    Författare :Rubina Kotak; Astronomi - Genomgår omorganisation; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; pulsating white dwarfs; convection; asteroseismology; Astronomi; Astronomy; spectroscopy; Fysicumarkivet A:2002:Kotak;

    Sammanfattning : Several analyses using time-resolved optical spectrocopy of pulsating white dwarfs are presented. The data have been put to a number of uses. First, line-of-sight velocities associated with the pulsations have been measured in three hydrogen-atmosphere white dwarfs (DAVs), bringing the total number of such measurements up to five. LÄS MER