Turbulent pressure support and hydrostatic mass bias in the intracluster medium
نویسندگان
چکیده
منابع مشابه
Hydrostatic equilibrium of a porous intracluster medium: implications for mass fraction and X-ray luminosity
The presence of dilute hot cavities in the intracluster medium (ICM) at the cores of clusters of galaxies changes the relation between gas temperature and its X-ray emission properties. Using the hydrostatic equations of a porous medium we solve for the ICM density for a given temperature as a function of the filling factor of dilute bubbles. We find that at a given temperature, the core X-ray ...
متن کاملRam pressure stripping in a viscous intracluster medium
In the recent literature there is circumstantial evidence that the viscosity of the intracluster medium may not be too far from the Spitzer value. In this letter, we present two-dimensional hydrodynamical simulations of ram pressure stripping of disc galaxies in a viscous intracluster medium (ICM). The values of viscosity explored range between 0.1 and 1.0 times the Spitzer value. We find that ...
متن کاملIntracluster Stars and the Chemical Enrichment of the Intracluster Medium
We explore the contribution of intracluster stars (ICS) to the chemical enrichment history of the intracluster medium (ICM). In contrast to scenarios in which all the metals originate in cluster galaxies and are then transported into the ICM, intracluster stars enrich the ICM in situ, thereby contributing 100% of their supernovae ejecta directly into the ICM. Modeling the ICS as an ancient, sin...
متن کاملTurbulence and Mixing in the Intracluster Medium
The intracluster medium (ICM) is stably stratified in the hydrodynamic sense with the entropy s increasing outwards. However, thermal conduction along magnetic field lines fundamentally changes the stability of the ICM, leading to the “heat-flux buoyancy instability” when dT/dr > 0 and the “magnetothermal instability” when dT/dr < 0. The ICM is thus buoyantly unstable regardless of the signs of...
متن کاملThe Magnetothermal Instability in the Intracluster Medium
The electron mean free path in the intracluster medium (ICM) of galaxy clusters is much larger than the gyroradius; thus, heat is transported anisotropically along magnetic field lines. We show that the intracluster medium is unstable to the magnetothermal instability (MTI) using MHD simulations with anisotropic thermal conduction. As a result of the MTI, we find that the temperature profile of...
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: Monthly Notices of the Royal Astronomical Society
سال: 2020
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/staa975