Velocity Tomography in the Core of the Centaurus Cluster
Abstract
ASCA analysis of the velocity distribution of the intracluster gas of the Centaurus cluster found velocity gradients on the order of >1E3 km/s at spatial scales of 3-8 arcmin from the clusters' center. The gain variations across the spectrometers on-board Chandra are more than 3 times smaller than those in ASCA SISs. Here, we present the preliminary results for a velocity analysis of the ICM of Centaurus at spatial scales <5 arcmin with Chandra's ACIS-S3. This is the first observation specifically designed to reduce gain variations to a minimum and therefore to constrain ICM bulk velocities to <500 km/s reliably. We discuss the characteristics of the velocity gradients found and their possible association to the current merging event in the Centaurus cluster.
- Publication:
-
35th COSPAR Scientific Assembly
- Pub Date:
- 2004
- Bibcode:
- 2004cosp...35..688D