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[Fizinfo] CSFK seminar -- Bogdán Ákos (Harvard & Smithsonian, Center for Astrophysics, USA) -- Date: Mar 12 (Thursday)

From: vidakris AT konkoly.hu
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Subject: [Fizinfo] CSFK seminar -- Bogdán Ákos (Harvard & Smithsonian, Center for Astrophysics, USA) -- Date: Mar 12 (Thursday)
Date: Fri, 06 Mar 2026 12:00:01 +0100
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Szemináriumi meghívó / Invitation to a seminar
----------------------------------------------

CSFK CSI SZEMINÁRIUM / KONKOLY OBSERVATORY SEMINAR

Date: Mar 12 (Thursday) 14:00

Bogdán Ákos (Harvard & Smithsonian, Center for Astrophysics, USA)
Illuminating Supermassive Black Holes and Protoclusters in the First Billion
Years of the Universe

In the first billion years, the Universe built its first giants with
remarkable efficiency: black holes reaching unexpectedly large masses, and
the earliest cluster progenitors assembling into massive halos. JWST is now
uncovering an abundance of high-redshift galaxies as well as rare
concentrations of galaxies at z > 5, while the Chandra X-ray Observatory
provides a unique view of black hole accretion and faint, extended X-ray
emission from hot gas. In this talk, I will show how combining Chandra and
JWST data acts as a force multiplier in the era of cosmic dawn. I will
present the detection of gravitationally lensed AGN at z ~ 10 that directly
probe early supermassive black hole seeding and rapid growth, including
sources that can remain hidden from JWST when the nucleus is heavily
obscured. I will also highlight evidence for hot gas in a protocluster at z ~
5.7, offering a unique window into massive halo assembly at early times.
Together, these results show that we are now directl
y directly witnessing early supermassive black hole growth and the buildup
of the first massive environments, providing a new view of the origins of
supermassive black holes and the progenitors of galaxy clusters.

https://konkoly.hu/k-szeminariumok

The seminar will be held live in the Detre hall with audience, but also
streamed online via Zoom. If you are unable to attend the presentation in
person, you can join us via this link
https://us06web.zoom.us/j/82806911982?pwd=SVZpT0syQ1J6dHBvSkF4N2dXNEQ0dz09
or the meeting ID: 828 0691 1982 and passcode: 206265

Everyone is welcome!

Krisztián Vida, Mina Ghodsi
organizers
https://konkoly.hu/k-szeminariumok

[Fizinfo] CSFK seminar -- Bogdán Ákos (Harvard & Smithsonian, Center for Astrophysics, USA) -- Date: Mar 12 (Thursday), vidakris, 03/06/2026