Searching for the missing iron mass in the core of the Centaurus cluster

  title={Searching for the missing iron mass in the core of the Centaurus cluster},
  author={Electra Panagoulia and Andrew C. Fabian and Jeremy S Sanders},
  journal={Monthly Notices of the Royal Astronomical Society},
We re-analyse a combined 198 ks Chandra observation of NGC4696, the brightest galaxy of the Centaurus cluster. We extract temperature and metallicity profiles from the data, and we confirm the presence of a sharp drop in iron abundance, from ~1.8 Zsolar to ~0.4 Zsolar, within the central 5 kpc of the cluster. We estimate that this abundance drop corresponds to a total "missing" iron mass of 1.4e06 Msolar. We propose that part of this missing iron is locked up in cool (~19 K) far-IR emitting… 

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