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

@article{Panagoulia2013SearchingFT,
  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},
  year={2013},
  volume={433},
  pages={3290-3296}
}
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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References

SHOWING 1-10 OF 59 REFERENCES
Enrichment in the Centaurus cluster of galaxies
We perform a detailed spatially resolved, spectroscopic, analysis of the core of the Centaurus cluster of galaxies using a deep Chandra X-ray observation and XMM-Newton data. The Centaurus cluster
Herschel observations of the Centaurus cluster – the dynamics of cold gas in a cool core
Brightest cluster galaxies (BCGs) in the cores of galaxy clusters have distinctly different properties from other low-redshift massive ellipticals. The majority of the BCGs in coolcore clusters show
The extended Hα‐emitting filaments surrounding NGC 4696, the central galaxy of the Centaurus cluster
We present images of NGC 4696, the central galaxy in the Centaurus cluster, showing the large extent of cool filaments that are bright in Hα line emission. These filaments share the detailed
Spatially resolved X‐ray spectroscopy of the core of the Centaurus cluster
ABSTRA C T We present Chandra data from a 31.7-ks observation of the Centaurus cluster, using the ACIS-S detector. Images of the X-ray emission show a plume-like feature at the centre of the cluster,
A deep spectroscopic study of the filamentary nebulosity in NGC 4696, the brightest cluster galaxy in the Centaurus cluster
We present results of deep integral-field spectroscopy observations using high-resolution optical (4150–7200 A) VLT VIsible MultiObject Spectrograph spectra of NGC 4696, the dominant galaxy in the
A CHANDRA X-RAY ANALYSIS OF ABELL 1664: COOLING, FEEDBACK, AND STAR FORMATION IN THE CENTRAL CLUSTER GALAXY
The brightest cluster galaxy (BCG) in the Abell 1664 cluster is unusually blue and is forming stars at a rate of ∼ 23 M☉ yr−1. The BCG is located within 5 kpc of the X-ray peak, where the cooling
Cool X-ray emitting gas in the core of the Centaurus cluster of galaxies
We use a deep XMM-Newton Reflection Grating Spectrometer observation to examine the X-ray emission from the core of the Centaurus cluster of galaxies. We clearly detect Fe XVII emission at four
XMM-Newton observations of the Perseus Cluster. I. The temperature and surface brightness structure
We present preliminary results of a XMM-Newton 50 ks observation of the Perseus Cluster that provides an unprecedented view of the central 0.5 Mpc region. The projected gas temperature declines
Chandra observations of Abell 2199
We present results from an analysis of two Chandra observations of the rich, nearby galaxy cluster Abell 2199. We find evidence (having corrected for projection effects) for radial gradients in
Mapping small-scale temperature and abundance structures in the core of the Perseus cluster
We report further results from a 191-ks Chandra observation of the core of the Perseus cluster, Abell 426. The emission-weighted temperature and abundance structures are mapped in detail. There are
...
...