Speaker
Description
Distant quasars (QSOs) are considered key actors in the evolution of the early Universe. High-redshift merging systems, containing two or more supermassive black holes surrounded by close companions, tidal bridges, and tails on kiloparsec scales, represent an expected phenomenon, as evidenced by the first spatially resolved spectroscopic observations from the James Webb Space Telescope (JWST). The study of these gas-rich systems provides crucial insights for constraining key components of galaxy evolution models, enhancing our understanding of galaxy growth and the feedback effects of active galactic nuclei (AGN) throughout the history of the Universe.
In this work, I will present the merging system BR1202-0725 formed by a QSO and a submillimetre galaxy (SMG) with evidence of a heavily dust obscured black hole at its center. Together, they form one of the most distant close pairs of AGN known to date. Moreover, this merger is one of the most overdense fields known in the early universe, also formed by the three Lyα emitters.
Through JWST observations, I will discuss the properties of the QSO, the SMG’s BH, and the fast outflowing ionised gas found in this galaxy. Furthermore, we characterised the interstellar medium, the physical and ionising mechanisms and the kinematics of the merger. Finally, we investigated the environment of the system and we found four new galaxies. Then, this overdense system includes at least ten galaxies in a field of view of only 980 kpc2.
| Would you be interested in presenting a poster if the conference is oversubcribed? | No |
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