The Coma Cluster at gamma-ray energies: multifrequency constraints
arXiv:astro-ph/0405224 · doi:10.1051/0004-6361:20041174
Abstract
The Coma cluster exhibits evidence for a high-energetic non-thermal particle population. At frequencies >1 GHz recent radio halo observations confirm a significant spectral steepening of the volume-integrated emission. We calculate the volume-averaged high-energy spectrum due to inverse Compton scattering off the CMB radiation field and non-thermal bremsstrahlung according to an exponential cutoff in the electron spectrum as deduced from the radio observations. The synchrotron radiation from secondary pairs, created from the decay of charged mesons produced in hadronic pp-interactions, is found to set significant constraints on the energy content of relativistic hadrons in Coma. This limits the maximum flux at high energies. Our findings support a low ratio of relativistic hadron to thermal energy density. Predictions for Coma's high energy emission are discussed in the light of current and expected abilities of upcoming gamma-ray instruments.
7 pages, 2 figures, A&A, accepted; Minor changes to reflect the accepted version
References in corpus (31)
- A New Radio - X-Ray Probe of Galaxy Cluster Magnetic Fields
- On The Non Thermal Emission and Acceleration of Electrons in Coma and Other Clusters of Galaxies
- VERITAS: the Very Energetic Radiation Imaging Telescope Array System
- The Energy Spectrum of Primary Cosmic Ray Electrons in Clusters of Galaxies and Inverse Compton Emission
- Cosmic Rays, Radio Halos and Non-Thermal X-ray Emission in Clusters of Galaxies
- Constraining the population of cosmic ray protons in cooling flow clusters with gamma-ray and radio observations: Are radio mini-halos of hadronic origin?
- Clusters of Galaxies as a Storage Room for Cosmic Rays
- Cosmic Ray Electrons in Groups and Clusters of Galaxies: Primary and Secondary Populations from a Numerical Cosmological Simulation
- EGRET upper limits on the high-energy gamma-ray emission of galaxy clusters
- The diffuse radio emission from the Coma cluster at 2.675 GHz and 4.85 GHz
- Cosmic Ray Protons and Magnetic Fields in Clusters of Galaxies and their Cosmological Consequences
- Cosmic Ray Protons Accelerated at Cosmological Shocks and Their Impact on Groups and Clusters of Galaxies
- Nonthermal Emissions from Particles Accelerated by Turbulence in Clusters of Galaxies
- Clusters of Galaxies and the Diffuse Gamma Ray Background
- Nonthermal radiation from clusters of galaxies: the role of merger shocks in particle acceleration
- Inter-galactic Shock Acceleration and the Cosmic Gamma-ray Background
- Confirmation of non-thermal hard X-ray excess in the Coma cluster from two epoch observations
- 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
- Numerical Modeling of Gamma Radiation from Galaxy Clusters
- Nonthermal Particles and Radiation Produced by Cluster Merger Shocks
- Non-thermal Origin of the EUV and Soft X-rays from the Coma Cluster - Cosmic Rays in Equipartition with the Thermal Medium
- Non-Thermal Emission from Relativistic Electrons in Clusters of Galaxies: A Merger Shock Acceleration Model
- The non-thermal radiation - Cluster merger connection
- Inverse Compton Scattering as the Source of Diffuse EUV Emission in the Coma Cluster of Galaxies
- Implications of a Nonthermal Origin of the Excess EUV Emission from the Coma Cluster of Galaxies
- The gamma ray background from large scale structure formation
- On the Detectability of Gamma Rays from Clusters of Galaxies: Mergers versus Secondary Infall
- Modification of cluster radio halo appearance by the thermal Sunyaev-Zeldovich effect
- The EUV Emission in the Coma Cluster of Galaxies and the Underlying Source of this Radiation
- On the equipartition of thermal and non-thermal energy in clusters of galaxies
- The Evolution of Diffuse Radio Sources in Galaxy Clusters
Cited by in corpus (26)
- Cosmic rays in galaxy clusters and their non-thermal emission
- Multi-frequency analysis of neutralino dark matter annihilations in the Coma cluster
- Statistics of Giant Radio Halos from Electron Reacceleration Models
- Acceleration of primary and secondary particles in galaxy clusters by compressible MHD turbulence: from radio halos to gamma rays
- GeV Gamma-ray Flux Upper Limits from Clusters of Galaxies
- Search for gamma-ray emission from the Coma Cluster with six years of Fermi-LAT data
- Alfvenic reacceleration of relativistic particles in galaxy clusters in the presence of secondary electrons and positrons
- Probing the origin of giant radio halos through radio and gamma-ray data : the case of the Coma cluster
- Galaxy Clusters in the Swift/BAT era: Hard X-rays in the ICM
- Gamma rays from clusters of galaxies
- Constraints on the multi-TeV particle population in the Coma Galaxy Cluster with H.E.S.S. observations
- Hard X-ray and Gamma-ray Emission Induced by Ultra-High Energy Protons in Cluster Accretion Shocks
- Gamma Rays from Clusters and Groups of Galaxies: Cosmic Rays versus Dark Matter
- Constraining Cosmic Rays and Magnetic Fields in the Perseus Galaxy Cluster with TeV observations by the MAGIC telescopes
- Dense gas formation and destruction in a simulated Perseus-like galaxy cluster with spin-driven black hole feedback
- Radio Halos From Simulations And Hadronic Models I: The Coma cluster
- Nonthermal radiation mechanisms
- Particle acceleration and non-thermal emission from galaxy clusters
- Galaxy Clusters in the Swift/BAT era II: 10 more Clusters detected above 15 keV
- Gamma-ray probe of cosmic-ray pressure in galaxy clusters and cosmological implications
- Is the Sunyaev-Zeldovich effect responsible for the observed steepening in the spectrum of the Coma radio halo ?
- High Energy Neutrinos from Cosmic Ray Interactions in Clusters of Galaxies
- Constraining relativistic protons and magnetic fields in galaxy clusters through radio and gamma-ray observations : the case of A2256
- Neutrinos and Gamma Rays from Galaxy Clusters
- Gamma-ray emission from galaxy cluster outskirts versus radio relics
- A MINOT-based Study of Gamma-ray emission from SPT-CL J2012-5649/Abell 3667