BASS XXXIII: Swift-BAT blazars and their jets through cosmic time
L. Marcotulli, M. Ajello, C. M. Urry, V. S. Paliya, M. Koss, K. Oh, G., Madejski, Y. Ueda, M. Balokovi\'c, B. Trakhtenbrot, F. Ricci, C. Ricci, D., Stern, F. Harrison, M. C. Powell, and BASS Collaboration

TL;DR
This paper presents an updated luminosity function for Swift-BAT blazars, analyzes their evolution and contribution to the cosmic X-ray background, and predicts their high-energy neutrino and gamma-ray detectability.
Contribution
It provides the most recent blazar luminosity function in the 14-195 keV range, including detailed evolution, beaming effects, and multi-wavelength spectral energy distributions.
Findings
Blazars dominate high-luminosity end at all redshifts.
Blazar population evolves positively up to z~4.3.
Blazars contribute up to 18% of the X-ray background.
Abstract
We derive the most up-to-date Swift-Burst Alert Telescope (BAT) blazar luminosity function in the 14-195 keV range, making use of a clean sample of 118 blazars detected in the BAT 105-month survey catalog, with newly obtained redshifts from the BAT AGN Spectroscopic Survey (BASS). We determine the best-fit X-ray luminosity function for the whole blazar population, as well as for Flat Spectrum Radio Quasars (FSRQs) alone. The main results are: (1) at any redshift, BAT detects the most luminous blazars, above any possible break in their luminosity distribution, which means we cannot differentiate between density and luminosity evolution; (2) the whole blazar population, dominated by FSRQs, evolves positively up to redshift z~4.3, confirming earlier results and implying lower number densities of blazars at higher redshifts than previously estimated. The contribution of this source class to…
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Taxonomy
TopicsAstrophysics and Cosmic Phenomena · Radio Astronomy Observations and Technology · Dark Matter and Cosmic Phenomena
