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SUMMARY:Quasinormal modes in the field of a dyon-like dilatonic black hole
    corresponding to $A_1 + A_1$ Toda chain
DTSTART;VALUE=DATE-TIME:20261030T070000Z
DTEND;VALUE=DATE-TIME:20261030T071500Z
DTSTAMP;VALUE=DATE-TIME:20261027T035404Z
UID:indico-contribution-6273@cern.ch
DESCRIPTION:Speakers: Vladimir Ivashchuk (Rostest/RUDN)\nWe explore the qu
 asinormal modes of a massless test scalar field in the gravitational backg
 round  of a non-extremal dilatonic dyonic black hole. The dyon-like black 
 hole solution is considered  within a four-dimensional gravitational model
  that includes two scalar fields and two 2-forms. \n It is governed by two
  dilatonic coupling vectors \\(\\vec{\\lambda}_s\\) (with \\(s=1\,2\\))  t
 hat satisfy \\(\\vec{\\lambda}_1 = \\vec{\\lambda}_2 = \\vec{\\lambda}\\) 
 and \\(\\vec{\\lambda}^2 = 1/2\\).  We derive and examine the quasinormal 
 modes of a massless scalar test field in the eikonal limit. \nThese modes 
 are governed by the solution parameters $\\mu > 0$\, $P_1 > 0$\, and $P_2 
 > 0$. In the two limiting scenarios -- namely $P_1 = P_2 = 0$ and $P_1 = P
 _2 = P > 0$ -- our results reduce exactly to the known (eikonal) quasinorm
 al spectra for the Schwarzschild  and Reissner-Nordström black holes\, re
 spectively.\nNumerical higher-order WKB analysis of quasinormal frequencie
 s for two lower levels (for various values of parameters) is also presente
 d.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6273/
LOCATION: Conference Hall 4
URL:https://indico.particle.mephi.ru/event/626/contributions/6273/
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