chromatography-satellite-2018-posters-abstracts

Page 56

N o v e m b e r 1 2 - 1 3 , 2 0 1 8 | R o m e , I t a l y

Joint Event on

OF EXCELLENCE

IN INTERNATIONAL

MEETINGS

YEARS

CHROMATOGRAPHY AND SEPARATION SCIENCE

World Congress on

SATELLITE AND SPACE MISSIONS

International Conference and Exhibition on

Chromatography 2018 & Satellite 2018

Journal of Chemical Technology and Applications

Volume 2

J Chem Tech App 2018, Volume 2

GREYBODY FACTORS AND QUASINORMAL MODES OF BLACK HOLES:

EXACT ANALYTICAL EXPRESSIONS

Grigorios Panotopoulos

University of Lisbon, Portugal

reybody factors are frequency dependent quantities that measure the deviation from the perfect black body spectrum of Hawking

radiation, and they provide us with valuable information about the near horizon structure of black holes. In addition, when black

holes are perturbed the geometry of spacetime undergoes dumbed oscillations. Quasinormal modes, with a non-vanishing imaginary

part, provide us with the frequencies and the dumbing times of these oscillations, and since they do not depend on the initial condi-

tions, they carry unique information about the few black holes parameters.I will discuss both greybody factors and quasinormal modes

under scalar perturbations of the BTZ black hole as well as of the Eistein-Born- Infeld dilaton black hole, which is inspired from Super-

string Theory, and I will present exact analytical expressions for both quantities in both models.