Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-10-23
Astronomy and Astrophysics
Astrophysics
5 pages, 2 figures, aipproc, epsfig. To appear in "Cosmology and Particle Physics", Proceedings of the CAPP'2000 Conference, V
Scientific paper
10.1063/1.1363581
Quintessence models with a dark energy generated by pseudo Nambu-Goldstone bosons provide a natural framework in which to test the possibility that type Ia supernovae luminosity distance measurements are at least partially due to an evolution of the sources, since these models can have parameter values for which the expansion of the Universe is decelerating as well as values for which it is accelerating, while being spatially flat in all cases and allowing for a low density of clumped matter. The results of a recent investigation (astro-ph/0004138) of current observational bounds which allow for SNe Ia source evolution are discussed. It is found that models with source evolution still favour cosmologies with an appreciable amount of acceleration in the recent past, but that the region of parameter space which is most favoured shifts significantly.
No associations
LandOfFree
Supernovae Ia, evolution and quintessence does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Supernovae Ia, evolution and quintessence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Supernovae Ia, evolution and quintessence will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-45710