Universal Peaks Ratio In The Spectral Energy Density Of Double Hump Blazars, Gamma Ray Bursts, And Microquasars

Abstract

The peak frequencies of the two broad humps evident in the spectral energy density of blazars (SED) are time dependent and vary a lot between different blazars. However, their ratio in most blazars, appears to be almost universal and equal to $m_e{c}^2/4(1+z){\epsilon }_p$ to a good approximation, where $m_e$ is the electron mass, ${\epsilon }_p$ is the peak energy of the cosmic microwave background radiation, and $z$ is the redshift of the blazar. We discuss a possible origin of such a universal ratio in blazars and gamma ray bursts (GRBs). We point out a possible connection between the knee in the energy spectrum of cosmic ray electrons and the maximal peak energies of the two broad humps in the SED of high-energy peaked blazars.

Accepted for publication in ApJL

References in corpus (10)

• Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons
• Very-High-Energy Gamma Rays from a Distant Quasar: How Transparent Is the Universe?
• Observation of inverse Compton emission from a long $\gamma$-ray burst
• Unprecedented study of the broadband emission of Mrk 421 during flaring activity in March 2010
• Discovery of Very High Energy Gamma-Ray Emission from the BL Lac Object H2356-309 with the H.E.S.S. Cherenkov Telescopes
• Multiwavelength behaviour of the blazar 3C279: decade-long study from $\gamma$-ray to radio
• A theory of Cosmic Rays
• A decade of multi-wavelength observations of the TeV blazar 1ES 1215+303: Extreme shift of the synchrotron peak frequency and long-term optical-gamma-ray flux increase
• An intermittent extreme BL Lac: MWL study of 1ES 2344+514 in an enhanced state
• GeV-TeV Counterparts of SS 433/W50 from Fermi-LAT and HAWC Observations