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[Fizinfo] Wigner FK RMI Elméleti Osztály Szemináriuma (Jose Luis Jaramillo)

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  • From: Balog Janos <balog.janos AT>
  • To: fizinfo AT, rmkiusers AT
  • Subject: [Fizinfo] Wigner FK RMI Elméleti Osztály Szemináriuma (Jose Luis Jaramillo)
  • Date: Sat, 23 Jan 2021 06:15:10 +0100
  • Authentication-results: (amavisd-new); dkim=pass (1024-bit key) reason="pass (just generated, assumed good)"

A január 22-i szemináriumról videofelvétel készült. A link megtalálható a honlapon:

On 2021-01-20 07:57, Balog Janos wrote:
Wigner FK RMI Elméleti Osztály Szemináriuma
Tisztelettel meghívjuk

Jose Luis Jaramillo
(University of Dijon)

"On the stability of black hole quasi-normal modes"

címmel tartandó online szemináriumára.

Az előadás linkje:

Topic: Wigner ELMFO Seminar
Time: Jan 22, 2021 14:00 (room open from 13:30) Budapest
Direct link:
Meeting ID: 947 8254 6838
Passcode: 766139


In this talk we explore the issue of black hole quasi-normal mode
(QNM) instability.
Specifically, by adopting a hyperboloidal approach to QNMs
we cast the QNM problem as an eigenvalue problem for a non-selfadjoint
operator. Such operators suffer potentially of instabilities in their
spectrum and this point is addressed by specific tools in
non-selfadjoint spectral theory, among them the notion of pseudospectrum.
At an exploratory stage prior to the full analytical study,
we adopt here a numerical methodology based on pseudospectral methods.
After studying the Pöschl-Teller potential as a toy model already
containing the main features of the discussion, we address the black
hole Schwarzschild case. As a result of our analysis, we find strong
support to claim: i) the stability of the slowest decaying mode, and
ii) the instability of all QNM
overtones. We will conclude with a discussion of the potential
implications in astrophysics and fundamental physics.

Helye: online
Ideje: 2021 január 22 péntek d.u. 14:00

Szívesen látunk minden érdeklődőt.

Balog János

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