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Identifying heavy stellar black holes at cosmological distances with next generation gravitational-wave observatories
Stephen Fairhurst, Cameron Mills, Monica Colpi +4
We investigate the detectability of single-event coalescing black hole binaries with total mass of at cosmological distances () with t…
Are we surprised to find SMBHs with JWST at z > 9?
Raffaella Schneider, Rosa Valiante, Alessandro Trinca +3
JWST is unveiling for the first time accreting black holes (BHs) with masses of 10^6 - 10^7 Msun at z > 4, with the most distant residing in GNz11 at z = 10.6. Are we really surpri…
Exploring the nature of UV-bright galaxies detected by JWST: star formation, black hole accretion, or a non-universal IMF?
Alessandro Trinca, Raffaella Schneider, Rosa Valiante +4
We use the Cosmic Archaeology Tool (CAT) semi-analytical model to explore the contribution of Population (Pop) III/II stars and active galactic nuclei (AGNs) to the galaxy UV lumin…
HYPerluminous quasars at the Epoch of ReionizatION (HYPERION). A new regime for the X-ray nuclear properties of the first quasars
L. Zappacosta, E. Piconcelli, F. Fiore +40
The existence of luminous quasars (QSO) at the Epoch of Reionization (EoR; i.e. z>6) powered by supermassive black holes (SMBH) with masses challenges models…
First constraints of dense molecular gas at z~7.5 from the quasar Pōniuā'ena
Chiara Feruglio, Umberto Maio, Roberta Tripodi +13
We report the detection of CO(6-5) and CO(7-6) and their underlying continua from the host galaxy of quasar J100758.264+211529.207 (Pōniuā'ena) at z=7.5419, obtained with the NOrth…
Accurate dust temperature and star formation rate in the most luminous quasar in the HYPerluminous quasars at the Epoch of ReionizatION (HYPERION) sample
Roberta Tripodi, Chiara Feruglio, Francisca Kemper +14
We present ALMA Band 9 continuum observation of the ultraluminous quasi-stellar object (QSO) SDSS J0100+2802, providing a detection at GHz. SDSS J0100+2802 is…