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- Lectures
- Institute of Astronomy and Astrophysics
- Location
R1412 of the Astronomy-Mathematics Building, National Taiwan University
- Speaker Name
Fabrizio Arrigoni Battaia [MPA]
- State
Definitive
- Url
2024-04-15 12:00 - 12:40
The circum/intergalactic medium in emission around high-z quasars
Abstract
Quasars (QSOs) – active super-massive black holes at the center of galaxies – are the brightest non-transient sources in the Universe and are powered by intense accretion episodes. The copious radiation emitted by a luminous QSO can, like a flashlight, illuminate the surrounding material, allowing us to directly study structures extending to circumgalactic (~100 kpc) and intergalactic (Mpc) scales. In this talk I will quickly report on some of the latest results of the QSOMUSEUM survey which comprises VLT/MUSE observations for 120 z~3 single quasar fields and 8 quasar pairs. Using a high-resolution cosmological simulation I will then showcase the importance of the QSO radiation on circumgalactic scales, and show how the observation of extended emission around quasars not only give us access to the gas properties, but also to the properties of the central engine itself (black-hole mass, accretion rate, ionization cone opening angle).
