@booklet {21718,
	title = {Supermassive black holes at high redshifts},
	year = {2019},
	month = {2019/03/1},
	pages = {arXiv:1903.06106},
	abstract = {MeV blazars are the most luminous persistent sources in the Universe and emit most of their energy in the MeV band. These objects display very large jet powers and accretion luminosities and are known to host black holes with a mass often exceeding $10^9 M_{\odot}$. An MeV survey, performed by a new generation MeV telescope which will bridge the entire energy and sensitivity gap between the current generation of hard X-ray and gamma-ray instruments, will detect $\&gt;$1000 MeV blazars up to a redshift of $z=5-6$. Here we show that this would allow us: 1) to probe the formation and growth mechanisms of supermassive black holes at high redshifts, 2) to pinpoint the location of the emission region in powerful blazars, 3) to determine how accretion and black hole spin interplay to power the jet.},
	keywords = {Astrophysics - High Energy Astrophysical Phenomena},
	url = {https://ui.adsabs.harvard.edu/abs/2019arXiv190306106P},
	author = {Paliya, Vaidehi S. and Ajello, Marco and Marcotulli, Lea and Tomsick, John and Perkins, Jeremy S. and Prandini, Elisa and D{\textquoteright}Ammando, Filippo and De Angelis, Alessandro and Thompson, David and Li, Hui and Dominguez, Alberto and Beckmann, Volker and Guiriec, Sylvain and Wadiasingh, Zorawar and Coppi, Paolo and Harding, J. Patrick and Petropoulou, Maria and Hewitt, John W. and Ojha, Roopesh and Marcowith, Alexandre and Doro, Michele and Castro, Daniel and Baring, Matthew and Hays, Elizabeth and Orlando, Elena and Guiriec, Sylvain and Bozhilov, Vladimir and Agudo, Ivan and Venters, Tonia and McEnery, Julie and The, Lih-Sin and Hartmann, Dieter and Buson, Sara and Longo, Francesco and Gasparrini, Dario}
}
