A GTO 7 Proposal: The Strong Lensing Cluster Abell 1689

Astronomy and Astrophysics – Astronomy

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Chandra Proposal Id #07800064

Scientific paper

We propose to observe the lensing cluster Abell 1689 for 160 ks in order to (1) explore the nature of the X-ray substructure seen near the center; (2) produce a high spatial resolution temperature map of the cluster to assist in the interpretation of Astro-E2 data we will acquire; (3) map its dark matter distribution on scales comparable to the HST ACS data; (4) hunt down a multiply-lensed high redshift galaxy; and (5) elucidate the energy budget of the accretion and outflow processes in the vicinity of the supermassive black hole at the cluster center. The total Chandra exposure for the cluster will be a factor of 10 greater than that currently in the archive.

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