SÉMINAIRE DU GRECO
"Distance-luminosity data and baryonic oscillation to test the dark energy density variation" |
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Stéphane Fay |
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During this talk, one will look for constraints on some dark energy models defined by some constant and varying equations of state. First we will compare the constraints obtained with two sets of distance luminosity data (one published by Daly, the other by SLNS) and then look for what happens when one also takes the baryon oscillations discovered by SDSS into account. One will enlighten how this last kind of data can reduce degeneracy and even ruled out some models. Among others, using supernovae with baryon oscillations allow to show that best fits for all the equations of state indicate that dark energy should not vary and is close to a cosmological constant. |
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jeudi 23 mars 2006 - 11:00 Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris |
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