Sersic 159-03: discovery of the brightest soft X-ray excess emitting cluster of galaxies
arXiv:astro-ph/0107379 · doi:10.1086/324439
Abstract
The soft X-ray excess emission in the southern cluster Sersic 159-03 represents hiterto the strongest effect of its kind. Emission in the ~0.2-0.4 keV passband is detected far in excess of the expected contribution from the hot phase of the intra-cluster medium, and extends to the X-ray signal limit of the cluster. Our analysis of ROSAT PSPC observations reveal that the soft excess can be interpreted as either a thermal or non-thermal effect, and the high data quality allows to place tight constraints on the two currently competing models. However, each model now implies major revisions to our understanding of clusters of galaxies: either `warm' gas masses in similar amounts to the hot gas, or relativistic particles in or above equipartition with the hot phase, appear to be unavoidable.
11 pages + 4 color figures, ApJ Letters in press - minor changes
References in corpus (4)
- Cosmic Ray Protons Accelerated at Cosmological Shocks and Their Impact on Groups and Clusters of Galaxies
- FUSE Limits on FUV Emission from Warm Gas in Clusters of Galaxies
- ROSAT and BeppoSAX evidence of soft X-ray excess emission in the Shapley supercluster: A3571, A3558, A3560 and A3562
- Extreme Ultraviolet Emission in the Fornax Cluster of Galaxies
Cited by in corpus (18)
- XMM-Newton confirmation of Soft X-ray excess emission in clusters of galaxies - the discovery of O VII emission from an extended warm baryonic component
- Galaxy Clusters in the Swift/BAT era: Hard X-rays in the ICM
- Soft X-ray Excess in the Coma Cluster from a Cosmic Axion Background
- The soft X-ray emission in a large sample of galaxy clusters with ROSAT PSPC
- Soft X-ray excess emission in clusters of galaxies observed with XMM-Newton
- Observational evidence for gravitationally trapped massive axion(-like) particles
- Soft X-ray and extreme ultraviolet excess emission from clusters of galaxies
- Chandra X-ray observations of Abell 1835 to the virial radius
- Possible non-thermal nature of the soft-excess emission in the cluster of galaxies Sersic 159-03
- Thermal and non-thermal nature of the soft excess emission from Sersic 159-03 observed with XMM-Newton
- The diffuse soft excess emission in the Coma cluster from the ROSAT All-Sky Survey
- Confrontation of Intracluster and Interstellar Gas in Cluster-Centered Elliptical Galaxies: M87 in Virgo and NGC 4874 in Coma
- Uniformity of foreground Galactic neutral Hydrogen over cooling flow clusters
- ROSAT observations of the soft X-ray background and of the cluster soft excess emission in the Hercules supercluster
- A WHIM origin for the soft excess emission in the Coma cluster
- X-ray spectroscopy of Abell S1101 with Chandra, XMM-Newton and ROSAT: band-pass dependence of he temperature profile and soft excess emission
- WHIM emission and the cluster soft excess: a model comparison
- X-ray emission in IllustrisTNG circum-cluster environments. II -- Possible origins of the soft X-ray excess emission