Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2009-01-07
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
Lecture given at the International School of Physics Enrico Fermi of the Societa' Italiana di Fisica, Course CLXXII - "Astroph
Scientific paper
Traditional estimators of the mass of galaxy clusters assume that the cluster components (galaxies, intracluster medium, and dark matter) are in dynamical equilibrium. Two additional estimators, that do not require this assumption, were proposed in the 1990s: gravitational lensing and the caustic technique. With these methods, we can measure the cluster mass within radii much larger than the virial radius. In the caustic technique, the mass measurement is only based on the celestial coordinates and redshifts of the galaxies in the cluster field of view; therefore, unlike lensing, it can be, in principle, applied to clusters at any redshift. Here, we review the origin, the basics and the performance of the caustic method.
No associations
LandOfFree
Measuring the mass profile of galaxy clusters beyond their virial radius 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 Measuring the mass profile of galaxy clusters beyond their virial radius, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measuring the mass profile of galaxy clusters beyond their virial radius will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-720513