The peculiar velocity and temperature profile of galaxy clusters
نویسندگان
چکیده
منابع مشابه
The peculiar velocity and temperature profile of galaxy clusters
Dynamical parameters like average velocity dispersion and temperature profile of galaxy clusters are determined using a quasi equilibrium thermodynamic theory. The calculated velocity dispersion results from theory and simulations shows a good agreement with the velocity dispersion results of (Abdullah et al. 2011). An Adaptive Mesh Refinement (AMR), Grid based hybrid code have been used to car...
متن کاملPeculiar Velocities of Galaxy Clusters
We investigate the peculiar velocities predicted for galaxy clusters by theories in the cold dark matter family. A widely used hypothesis identifies rich clusters with high peaks of a suitably smoothed version of the linear density fluctuation field. Their peculiar velocities are then obtained by extrapolating the similarly smoothed linear peculiar velocities at the positions of these peaks. We...
متن کاملThe RMS Peculiar Velocity of Clusters
We study the rms peculiar velocity of clusters as a convenient statistic to put constraints on cosmological models. This statistic is easy to compute theoretically given a model for the power spectrum; we show that with some assumptions it can be directly related to the quantity Ω 0 σ8. We develop a likelihood method for estimating the rms peculiar velocity of clusters from line-of-sight veloci...
متن کاملThe rms peculiar velocity of galaxy clusters for different cluster masses and radii
We investigate the rms peculiar velocity of galaxy clusters in the Lambda cold dark matter (ΛCDM) and tau cold dark matter (τCDM) cosmological models using N-body simulations. Cluster velocities for different cluster masses and radii are examined. To identify clusters in the simulations we use two methods: the standard friends-offriends (FOF) method and the method, where the clusters are define...
متن کاملStreaming motions of galaxy clusters within 12000 km s − 1 — V . The peculiar velocity field
We analyze in detail the peculiar velocity field traced by 56 clusters within 120 hMpc in the “Streaming Motions of Abell Clusters” (SMAC) sample. The bulk flow of the SMAC sample is 687 ± 203 km s, toward l = 260◦ ± 13, b = 0◦ ± 11. We discuss possible systematic errors and show that no systematic effect is larger than half of the random error. The flow does not drop off significantly with dep...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Research in Astronomy and Astrophysics
سال: 2014
ISSN: 1674-4527
DOI: 10.1088/1674-4527/14/6/005