We report on an observational research program aimed at studying the physical properties, the environment and the cosmological relevance of high-redshift quasars. We have been awarded the largest XMM-Newton AO16 program (1.05 Msec) to study z>3 quasars, and a large (500 ks) Chandra program to investigate the environment of a z=6.31 quasar. Our objectives were: -use quasars as standard candles in the Hubble Diagram of quasars, in order to constrain the cosmological model at high redshift; - investigate quasar variability at all redshifts and luminosities with unprecedented detail; - characterize the multiwavelength emission of z=6 quasars, and their environment; obtain an unbiased and complete census of high-z blazars....
RisalitI, G., Caccianiga, A., Gilli, R., Paolillo, M., Amati, L., Bargiacchi, G., et al. (2022). Quasars at High-Redshift: Physics and Cosmology. MEMORIE DELLA SOCIETÀ ASTRONOMICA ITALIANA, 93, 64-73 [10.36116/MEMSAIT_93N2_3.2022.8].
Quasars at High-Redshift: Physics and Cosmology
RisalitI, G.;Gilli, R.;Amati, L.;Dallacasa, D.;Ighina, L.;Lusso, E.;Marchesi, S.Writing – Review & Editing
;Nanni, R.;Signorini, M.;Spingola, C.;
2022
Abstract
We report on an observational research program aimed at studying the physical properties, the environment and the cosmological relevance of high-redshift quasars. We have been awarded the largest XMM-Newton AO16 program (1.05 Msec) to study z>3 quasars, and a large (500 ks) Chandra program to investigate the environment of a z=6.31 quasar. Our objectives were: -use quasars as standard candles in the Hubble Diagram of quasars, in order to constrain the cosmological model at high redshift; - investigate quasar variability at all redshifts and luminosities with unprecedented detail; - characterize the multiwavelength emission of z=6 quasars, and their environment; obtain an unbiased and complete census of high-z blazars....I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
