Gravity, Cosmology, and Astrophysics

Part I. Astrophysics & Observations.- Chapter 1. Quasinormal Modes of Static Ellis-Bronnikov Wormholes (Bahareh Azad).- Chapter 2. Stationary models of relativistic viscous torus (Sayantani Lahiri).- Chapter 3. Shadows and accretion disk images of compact objects (Petya Nedkova).- Chapter 4. The optical appearance of compact stars: Shadows and luminous rings (Merce Guerrero).- Chapter 5. Beyond Newtonian Dynamics of Planar CRTBP with Kerr - like Primaries (Suparna Roychowdhury).- Part II. Extended gravity models.- Chapter 6. Neutron Stars in General Relativity and in Alternative Gravity Theories: Quasinormal Modes and Universal Relations (Fech Scen Khoo).- Chapter 7. Introduction to stellar and substellar physics in modified gravity (Aneta Wojnar).- Part III. Cosmology.- Chapter 8. Chameleon perfect scalar field as a geometric correction in f (R) gravity (Laura L. Parrilla).- Chapter 9. Probing the nature of cosmic strings with gravitational waves (Lara Sousa).- Part IV. Quantum Gravity & Mathematical Relativity.- Chapter 10. Entanglement in conformal field theory and holography (Nele Callebaut).- Chapter 11. Coordinates are messy - not only in General Relativity (Carla Cederbaum).- Chapter 12. Primordial Black Holes and Higgs Vacuum Decay (Ruth Gregoryz).

Betti Hartmann is currently an Associate Professor in the Department of Mathematics at University College London (UCL), UK. She obtained her PhD in Theoretical Physics from Oldenburg University (Germany) in 2001. Following her doctoral studies, she held post-doctoral positions at the University of Durham, UK from 2001-2003 and at the Université de Tours, France from 2006-2007. In 2006, she completed her German habilitation, a post-doctoral qualification for lecturers at German universities, at the University of Oldenburg. From 2003 to 2006 and 2007 to 2015, she held a Lecturer position at Jacobs University Bremen, Germany, and in 2015, she was appointed as an Assistant Professor at the Instituto de Física de São Carlos at the Universidade de São Paulo, Brazil. She was promoted to Associate Professor in 2016 and left Brazil to join UCL as a Lecturer in 2021. In October 2023 she has been promoted to Associate Professor.

Her research interests lie in the field of nonlinear phenomena in theoretical physics and applied mathematics, with a particular focus on solitons and black holes. Her research has applications in high-energy physics, including cosmology, astrophysics, and particle physics, as well as in low-energy phenomena relevant to condensed matter physics and biophysics.

In 2022, she published a book in German titled 'Vordenkerinnen - Physikerinnen und Philosophinnen durch die Jahrhunderte' in collaboration with a philosopher. The book highlights the achievements of female scientists throughout history.






Jutta Kunz has been a professor of theoretical physics at the University of Oldenburg since 1993. She obtained her Diploma in Physics from the University of Giessen and completed her PhD in 1982 after a year of graduate studies at the University of Washington, Seattle. She held post-doctoral positions at LANL, Los Alamos from 1982 to 1984, in Giessen from 1984 to 1987, at NIKHEF, Amsterdam from 1987 to