Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-01-28
Astronomy and Astrophysics
Astrophysics
PhD Thesis, 180 pages, 25 figures, LaTeX
Scientific paper
Clusters of galaxies are the largest gravitationally-bound objects in the Universe, having diameters on order of Mpc. Our work asked whether their shapes (morphologies) change over time as the Universe ages. We observed a sample of 165 galaxy clusters, at 0.1 < z < 1.3. A variety of measures were used to quantify the shapes of galaxy clusters. Archive observations from the Chandra X-Ray Observatory were used. Morphology evolution was probed at two different distances from clusters' centers -- 300 kpc and 500 kpc -- for comparison. In almost all cases, we were able to rule out that clusters retain their morphology over the history of the Universe, which is in agreement with our current picture of large-scale structure formation. In addition, we found that ellipticities, as a means of quantifying morphologies, are of limited use in studies such as this work.
No associations
LandOfFree
Evolution of Substructure in Galaxy Clusters as Observed in X-Rays 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 Evolution of Substructure in Galaxy Clusters as Observed in X-Rays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of Substructure in Galaxy Clusters as Observed in X-Rays will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-156299