Abstract
We report the results from a spatially resolved spectroscopy study with
XMM-Newton on the relaxed cluster of galaxies Abell
478. From the EPIC data we extract a temperature profile and
radial abundance profiles for Ne, Mg, Si, S, Ca, Fe and Ni. The
abundance profiles follow the same trends as observed in other clusters.
The spectra of the core of the cluster can be best fitted with a
multi-temperature model. We argue that this multi-temperature behavior
is mostly due to projection effects, because of the strong temperature
gradient in the core. Contributions from other effects, for example,
intrinsic temperature stratification cannot be fully excluded. For the
first time we measure an underabundance of oxygen in the Galactic
absorption component toward a cluster. The measured oxygen abundance in
this absorber is about 0.5 times the solar oxygen abundance as
determined by \citet{anders1989}.
| Original language | English |
|---|---|
| Pages (from-to) | 49-56 |
| Number of pages | 8 |
| Journal | Astronomy and astrophysics |
| Volume | 423 |
| Publication status | Published - 1-Aug-2004 |
| Externally published | Yes |
Keywords
- galaxies: clusters: general
- galaxies: clusters: individual: Abell 478
- galaxies: cooling flows
- galaxies: intergalactic medium
- X-rays: galaxies: clusters
- ISM: abundances