A Chandra observation of the disturbed cluster core of Abell 2204

Details A Chandra observation of the disturbed cluster core of Abell 2204 A Chandra observation of the disturbed cluster core of Abell 2204

2004-06-03

arxiv.org/abs/astro-ph/0406094v1

Mon.Not.Roy.Astron.Soc.356:1022-1028,2005

Astronomy and Astrophysics

Astrophysics

7 pages, submitted to MNRAS

Scientific paper

10.1111/j.1365-2966.2004.08526.x

We present results from an observation of the luminous cluster of galaxies Abell 2204 using the Chandra X-ray Observatory. We show the core of the cluster has a complex morphological structure, made up of a high density core (n_e~0.2 cm^-3) with flat surface brightness, a surrounding central plateau, a tail-like feature, wrapping around to the east, and an unusual radio source. A temperature map and deprojected-profile shows that the temperature rises steeply outside these regions, until around ~100 kpc where it drops, then rises again. Abundance maps and profiles show that there is a corresponding increase in abundance at the same radius as where the temperature drops. In addition there are two cold fronts at radii of ~28 and 54.5 kpc. The disturbed morphology indicates that the cluster core may have undergone a merger. However, despite this disruption the mean radiative cooling time in the centre is short (~230 Myr) and the morphology is regular on large scales.

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