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Date:

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Time:

Thursday, 15 Feb. 2024

Video-Recording for any system with MP4-support

- Video.mp4 (ca. 208 Mb)

15:15 – 16:15

"Formation of the First Stars and Black Holes in the Universe"

Prof. Naoki Yoshida

(Kavli IPMU, University of Tokyo)

Abstract:

Recent observations using brand-new telescopes such as NASA's James Webb

Space Telescope discovered infant galaxies that were in place when the age

of the universe was just a few hundred million years. Massive black holes

were also found at the early epochs, suggesting mysterious processes that

drive star formation in the "cosmic dawn". I review recent progress in the

study on the formation of the first generation of stars. I present the

results from state-of-the-art computer simulations of cosmic structure

formation, and identify several key issues and open questions. Our

super-computer simulations start from realistic cosmological initial

conditions that incorporate super-sonic gas motions left over from the Big

Bang. Tiny magnetic fields generated by the gas motions are also

incorporated. I discuss formation of massive stars, black holes, and

gravitational wave sources. Finally, I give prospects for future

observations using next generation telescopes.

About the speaker:

Naoki Yosida is a Professor at Kavli IPMU, University of Tokyo. He

graduated from University of Tokyo, followed by a Licentiate of

Engineering degree at KTH in Stockholm, and a PhD at the

Max-Planck-Institute for Astrophysics in Garching, Germany. He has

thereafter held positions at Harvard University and Nagoya University. In

2017 he was awarded the Japan Academy Medal and the Japan Society of

Promotion of Science Prize for his outstanding research on large-scale

numerical simulations of structure formation in the early Universe.