Central engine of the highest redshift blazar

@article{Belladitta2022CentralEO,
  title={Central engine of the highest redshift blazar},
  author={Silvia Belladitta and Alessandro Caccianiga and Alessandro Diana and Alberto Moretti and Paola Severgnini and Marco Pedani and Letizia P. Cassar{\`a} and Cristiana Spingola and L Ighina and Andrea Rossi and R. Della Ceca},
  journal={Astronomy \& Astrophysics},
  year={2022}
}
We present the results of a new LUCI / Large Binocular Telescope near-infrared (NIR) spectroscopic observation of PSO J030947.49 + 271757.31 (hereafter PSO J0309 + 27), the highest redshift blazar known to date ( z ∼ 6 . 1). From the CIV λ 1549 broad emission line, we found that PSO J0309 + 27 is powered by a 1.45 + 1 . 89 − 0 . 85 × 10 9 M (cid:12) supermassive black hole (SMBH) with a bolometric luminosity of ∼ 8 × 10 46 erg s − 1 and an Eddington ratio equal to 0.44 + 0 . 78 − 0 . 35 . We… 

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The central engine of the highest redshift blazar