Constraining broad photon spectrum injections from exotic and astrophysical sources

Abstract

We study the evolution of photon injections with a power-law type spectrum inserted at various epochs of the universe, and obtain constraints on their parameter space from multiple different cosmological probes. Our work is motivated by the realistic possibility of having extended photon spectra from astrophysical and exotic sources. Going beyond a $\delta$-function like approximation, the physics becomes richer and the constraining power of cosmological probes starts to depend on the photon injection history in a complex way. As a toy model, we first consider a decaying particle scenario, and then generalize to a more model independent power law type injection in redshift. Different combinations of our parameters can be mapped to a wide variety of realistic astrophysical and exotic sources, providing useful benchmarks for study in future work.

arXiv commentComments welcome

References in corpus (48)

• Cosmic Star Formation History
• The Cosmic Microwave Background Spectrum from the Full COBE/FIRAS Data Set
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Power Spectra and WMAP-Derived Parameters
• An absorption profile centred at 78 megahertz in the sky-averaged spectrum
• CMB Constraints on WIMP Annihilation: Energy Absorption During the Recombination Epoch
• How exactly did the Universe become neutral?
• Particle decays during the cosmic dark ages
• The evolution of CMB spectral distortions in the early Universe
• Detecting Dark Matter Annihilation with CMB Polarization : Signatures and Experimental Prospects
• ARCADE 2 Measurement of the Extra-Galactic Sky Temperature at 3-90 GHz
• CMB constraints on Dark Matter models with large annihilation cross-section
• The Global 21 Centimeter Background from High Redshifts
• HyRec: A fast and highly accurate primordial hydrogen and helium recombination code
• Enhanced global signal of neutral hydrogen due to excess radiation at cosmic dawn
• Modeling the Radio Background from the First Black Holes at Cosmic Dawn: Implications for the 21 cm Absorption Amplitude
• A fresh look at linear cosmological constraints on a decaying dark matter component
• Towards a complete treatment of the cosmological recombination problem
• The Radio Background Below 100 MHz
• Induced two-photon decay of the 2s level and the rate of cosmological hydrogen recombination
• WMAP7 and future CMB constraints on annihilating dark matter: implications for GeV-scale WIMPs
• CMB Anisotropy in the Decaying Neutrino Cosmology
• Beyond y and μ: the shape of the CMB spectral distortions in the intermediate epoch, 1.5x10^4 < z < 2x10^5
• Could the Cosmological Recombination Spectrum Help Us Understand Annihilating Dark Matter?
• Signals From the Epoch of Cosmological Recombination
• Green's function of the cosmological thermalization problem II: effect of photon injection and constraints
• The contribution of the Unresolved Extragalactic Radio Sources to the Brightness Temperature of the sky
• Spectral distortion constraints on photon injection from low-mass decaying particles
• Non-universal BBN bounds on electromagnetically decaying particles
• Creation of the CMB spectrum: precise analytic solutions for the blackbody photosphere
• CMB spectral distortions revisited: a new take on $\mu$ distortions and primordial non-Gaussianities from FIRAS data
• TRIS II: search for CMB spectral distortions at 0.60, 0.82 and 2.5 GHz
• The Radio Synchrotron Background: Conference Summary and Report
• Refined approximations for the distortion visibility function and mu-type spectral distortions
• CMB anisotropy and BBN constraints on pre-recombination decay of dark matter to visible particles
• Dark radiation constraints on portal interactions with hidden sectors
• The role of soft photon injection and heating in 21 cm cosmology
• Electron and Photon Energy Deposition in Universe
• Semi-blind Eigen-analyses of Recombination Histories Using CMB Data
• Millicharged Relics Reveal Massless Dark Photons
• Constraints on perturbations to the recombination history from measurements of the CMB damping tail
• Improved model-independent constraints on the recombination era and development of a direct projection method
• Can accreting primordial black holes explain the excess radio background?
• The cosmic radio background from 150 MHz--8.4 GHz, and its division into AGN and star-forming galaxy flux
• BISOU: a balloon project to measure the CMB spectral distortions
• Diffuse Sources, Clustering and the Excess Anisotropy of the Radio Synchrotron Background
• Exotic energy injection in the early universe II: CMB spectral distortions and constraints on light dark matter
• A cosmic string solution to the radio synchrotron background
• Constraints on the spectral signatures of superconducting cosmic strings

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• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics