Non-thermal Sunyaev-Zeldovich signal from radio galaxy lobes

Abstract

Energetic electrons in the lobes of radio galaxies make them potential sources for not only radio and X-rays but also Sunyaev-Zeldovich (SZ) distortions in the cosmic microwave background (CMB) radiation. Previous works have discussed the energetics of radio galaxy lobes, but assuming thermal SZ effect, coming from the non-thermal electron population. We use an improved evolutionary model for radio galaxy lobes to estimate the observed parameters such as the radio luminosity and intensity of SZ-distortions at the redshifts of observation. We, further, quantify the effects of various relevant physical parameters of the radio galaxies, such as the jet power, the time scale over which the jet is active, the evolutionary time scale for the lobe, etc on the observed parameters. For current SZ observations towards galaxy clusters, we find that the non-thermal SZ distortions from radio lobes embedded in galaxy clusters can be non-negligible compared to the amount of thermal SZ distortion from the intra-cluster medium and, hence, can not be neglected. We show that small and young (and preferably residing in a cluster environment) radio galaxies offer better prospects for the detection of the non-thermal SZ signal from these sources. We further discuss the limits on different physical parameters for some sources for which SZ effect has been either detected or upper limits are available. The evolutionary models enable us to obtain limits, previously unavailable, on the low energy cut-off of electron spectrum ($p_{min}\sim 1–2$) in order to explain the recent non-thermal SZ detection. Finally, we discuss how future CMB experiments, which would cover higher frequency bands ($>$400 GHz), may provide clear signatures for non-thermal SZ effect.

arXiv commentReplaced with published version

References in corpus (32)

• The Cosmic Microwave Background Spectrum from the Full COBE/FIRAS Data Set
• The Simons Observatory: Science goals and forecasts
• The Sunyaev-Zel'dovich Effect
• CMB-S4 Science Case, Reference Design, and Project Plan
• The evolution of CMB spectral distortions in the early Universe
• Relativistic Corrections to the Sunyaev-Zel'dovich Effect for Clusters of Galaxies
• CMB-S4 Science Book, First Edition
• An X-ray study of magnetic field strengths and particle content in FRII radio sources
• Radio galaxies and feedback from AGN jets
• Evolutionary tracks of FRII sources through the P-D diagram
• CMB at 2x2 order: the dissipation of primordial acoustic waves and the observable part of the associated energy release
• Relativistic corrections to the Sunyaev-Zel'dovich effect
• Astrophysics with the Spatially and Spectrally Resolved Sunyaev-Zeldovich Effects: A Millimetre/Submillimetre Probe of the Warm and Hot Universe
• Intermittent radio galaxies and source statistics
• Secondary anisotropies of the CMB
• ASCA Compilation of X-Ray Properties of Hot Gas in Elliptical Galaxies and Galaxy Clusters: Two Breaks in the Temperature Dependences
• Mixing of blackbodies: entropy production and dissipation of sound waves in the early Universe
• Planck's view on the spectrum of the Sunyaev-Zeldovich effect
• Spectral distortion of cosmic background radiation by scattering on hot electrons. Exact calculations
• PICO: Probe of Inflation and Cosmic Origins
• The Sunyaev-Zel'dovich Effect by Cocoons of Radio Galaxies
• The extended X-ray emission around HDF130 at z=1.99: an inverse Compton ghost of a giant radio source in the Chandra Deep Field North
• The inverse-Compton X-ray-emitting lobes of the high-redshift giant radio galaxy 6C 0905+39
• SZ effect from radio-galaxy lobes: astrophysical and cosmological relevance
• 0.5 Mpc-scale extended X-ray emission in 4C 23.56
• Cosmological evolution of the Fanaroff-Riley type II source population
• Intergalactic Matter and Cocoons of Radio Galaxies
• Suzaku observation of the giant radio galaxy 3C 326
• The energetics of giant radio galaxy lobes from inverse Compton scattering observations
• Extended X-ray emission from radio galaxy cocoons
• Relativistic inverse Compton scattering of photons from the early universe
• A multi-frequency study of the SZE in giant radio galaxies

Cited by in corpus (4)

• Atacama Large Aperture Submillimeter Telescope (AtLAST) Science: Resolving the Hot and Ionized Universe through the Sunyaev-Zeldovich effect
• Constraining the average magnetic field in galaxy clusters with current and upcoming CMB surveys
• Thermal and non-thermal Sunyaev-Zel'dovich effect in the cavities of the galaxy cluster MS 0735.6+7421: the role of the thermal density in the cavity
• The non-thermal secondary CMB anisotropies from a cosmic distribution of radio galaxy lobes