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106 papers · 1 filter
Non-vacuum metrics for the Newman-Unti-Tamburino background: A coordinate-free approach to diverging and twisting solutions
Ayşe Hümeyra Bilge, Tolga Birkandan, Tekin Dereli +1
The geometry of the Newman-Unti-Tamburino (NUT) vacuum solution is characterized as the unique Petrov Type D vacuum metric such that the two double principal null directions form a…
Impact of Anisotropy on Neutron Star Structure and Curvature
A. C. Khunt, K. Yavuz Ekşi, P. C. Vinodkumar
We investigate the impact of pressure anisotropy on the structural and geometric properties of neutron stars within general relativity, focusing primarily on the phenomenological B…
A coordinate-free approach to obtaining exact solutions in general relativity: The Newman-Unti-Tamburino solution revisited
Emir Baysazan, Ayse Humeyra Bilge, Tolga Birkandan +1
The Newman-Unti-Tamburino (NUT) solution is characterized as the unique Petrov Type vacuum metric such that the two double principal null directions form an integrable distribu…
Unexplored regions in teleparallel gravity: Sign-changing dark energy density
Ozgur Akarsu, Bilal Bulduk, Antonio De Felice +2
While gravity has shown considerable potential in addressing cosmological tensions, we explore previously overlooked solution spaces that hold further promise. We examine th…
Analysis of scalar fields with series convolution
Emir Baysazan, Tolga Birkandan, Ismail Eyuphan Unver
Wave equations for some curved spacetimes may involve functions that prevent a solution in a closed form. In some cases, these functions can be eliminated by transformations and th…
Stability Analysis of the Cosmological Dynamics of -complete Stringy Gravity
A. Savaş Arapoğlu, Sermet Çağan, Aybike Çatal-Özer
The massless fields in the universal NS-NS sector of string theory form multiplets of Double Field Theory, which is a theory that provides a T-duality covariant formulati…