On the effect of scalar fields on Hawking radiation and quasinormal modes of black holes

Abstract

Declaration by the studentDate: May 21, 2021 I, Avijit Chowdhury Registration No. 13IP001 dated 25/07/2013, a student of Department of Physical Sciences of the Integrated PhD Programme of the Indian Institute of Science Education and Research Kolkata (IISER Kolkata), hereby declare that this thesis is my own work and, to the best of my knowledge, it neither contains materials previously published or written by any other person, nor it has been submitted for any degree/diploma or any other academic award anywhere before.I also declare that all copyrighted material incorporated into this thesis is in compliance with the Indian Copyright (Amendment) Act, 2012 and that I have received written permission from the copyright owners for my use of their work.I hereby grant permission to IISER Kolkata to store the thesis in a database which can be accessed by others.

Quasinormal modes and absorption of a massless scalar field for the magnetic Gauss–Bonnet black hole

“…Hawking emission spectrum is not a perfect black body spectrum to an asymptotic observer, and the deviation of the Hawking radiation spectrum from the exact black body spectrum can be described by the gray-body factor [20]. In this section, we discuss the gray-body factors and absorption cross-section for the massless scalar field of the magnetic Gauss-Bonnet black hole.…”