منابع مشابه
Shocks and Cold Fronts in Galaxy Clusters
The currently operating X-ray imaging observatories provide us with an exquisitely detailed view of the Megaparsec-scale plasma atmospheres in nearby galaxy clusters. At z < 0.05, the Chandra’s 1 angular resolution corresponds to linear resolution of less than a kiloparsec, which is smaller than some interesting linear scales in the intracluster plasma. This enables us to study the previously u...
متن کاملDifferent Methods of Forming Cold Fronts in Non-merging Clusters
Sharp edges in X-ray surface brightness with continuous gas pressure called cold fronts have been often found in relaxed galaxy clusters such as Abell 496. Models that explain cold fronts as surviving cores of head-on subcluster mergers do not work well for these clusters and competing models involving gas sloshing have been recently proposed. Here, we test some concrete predictions of these mo...
متن کاملMerging Cold Fronts in the Galaxy Pair Ngc 7619 and Ngc 7626
We present results from Chandra observations of the galaxy pair NGC 7619 and NGC 7626, the two dominant members of the Pegasus group. The X-ray images show a brightness edge associated with each galaxy, which we identify as merger cold fronts. The edges are sharp, and the axes of symmetry of the edges are roughly anti-parallel, suggesting that these galaxies are falling towards one another in t...
متن کاملCold Fronts in Cdm Clusters
Recently, high-resolution Chandra observations revealed the existence of very sharp features in the Xray surface brightness and temperature maps of several clusters (Vikhlinin et al., 2001). These features, called “cold fronts”, are characterized by an increase in surface brightness by a factor ∼> 2 over 10-50 kpc, accompanied by a drop in temperature of a similar magnitude. The existence of su...
متن کاملChandra Observations of Cold Fronts in Cluster of Galaxies
High-resolution Chandra images of several clusters of galaxies reveal sharp, edge-like discontinuities in their gas density. The gas temperature is higher in front of the edge where the density is low, corresponding to approximately continuous pressure across the edge. This new phenomenon was called " cold fronts " , to contrast it to shock fronts that should look similar in X-ray images but wh...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2010
ISSN: 0035-8711
DOI: 10.1111/j.1365-2966.2010.17176.x