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Reconstruction of the scalar field potential in nonmetricity gravity through Gaussian processes
Gaurav N. Gadbail, Sanjay Mandal, P. K. Sahoo +1
The accelerated expansion of the universe has been widely confirmed, posing challenges to the standard CDM model, particularly the cosmological coincidence problem. This has mot…
Charged Fuzzy Dark Matter Black Holes
Z. Yousaf, Bander Almutairi, S. Khan +1
We investigate the impact of fuzzy dark matter (FDM) on supermassive black holes (SMBHs) characterized by a spherical charge distribution. This work introduces a new class of spher…
Orthogonal Splitting in Degenerate Higher-order Scalar-tensor Theories
Z. Yousaf, N. Z. Bhatti, H. Asad +2
We explore a comprehensive analysis of the formalism governing the gravitational field equations in degenerate higher-order scalar-tensor theories. The propagation of these theorie…
Completely Deformed Complexity-free Anisotropic Fluid Sphere
Z. Yousaf, Kazuharu Bamba, M. Z. Bhatti +1
In this work, we investigate the emergence of compact, anisotropic stellar structures through the gravitational decoupling scheme within the framework of complete geometric deforma…
A Double-Sine-Gordon Early Universe
Behnoush Afshar, Marziyeh Peyravi, Kazuharu Bamba +1
A solitonic model of the early universe is introduced by employing the Double-Sine-Gordon (DSG) potential. The model predicts the appropriate number of e-foldings () required…
Imprints of dark matter on the structural properties of minimally deformed compact stars
Z. Yousaf, Kazuharu Bamba, Bander Almutairi +2
In this manuscript, we investigate the possibility of constructing anisotropic dark matter compact stars motivated by the Einasto density profile. This work develops analytical sol…
The Stability of Anisotropic Compact Stars Influenced by Dark Matter under Teleparallel Gravity: An Extended Gravitational Deformation Approach
Sneha Pradhan, Piyali Bhar, Sanjay Mandal +2
In our investigation, we pioneer the development of geometrically deformed strange stars within the framework of teleparallel gravity theory through gravitational decoupling via th…
Measuring 60-pc-scale Star Formation Rate of the Nearby Seyfert Galaxy NGC 1068 with ALMA, HST, VLT/MUSE, and VLA
Yuzuki Nagashima, Toshiki Saito, Soh Ikarashi +7
Star formation rate (SFR) is a fundamental parameter for describing galaxies and inferring their evolutionary course. HII regions yield the best measure of instantaneous SFR in gal…
Role of Complexity on the Minimal Deformation of Black Holes
Z. Yousaf, Kazuharu Bamba, Bander Almutairi +2
We investigate spherically symmetric classes of anisotropic solutions within the realm of a schematic gravitational decoupling scheme, primarily decoupling through minimal geometri…
Stability of a realistic astrophysical pulsar and its mass-radius relation in higher-order curvature gravity
G. G. L. Nashed, Kazuharu Bamba
The objective of this research is to explore compact celestial objects while considering the framework of an extended gravitational theory known as gra…
Observational constraints on thawing quintessence scalar field model
Fereshteh Felegary, Kazuharu Bamba
Thawing quintessence scalar field models with the various potential forms to explain the late-time cosmic acceleration are compared to the ΛCDM model in detail by analyzing cosmolo…
Fuzzy Dark Matter Less-complex Wormhole Structures in Higher-Order Curvature Gravity
Z. Yousaf, Kazuharu Bamba, Bander Almutairi +2
Fuzzy dark matter wormhole solutions coupled with anisotropic matter distribution are explored in higher-order curvature gravity. We derive the shape function for fuzzy wormholes a…
Generic autonomous system approach to interacting dark energy models
Parth Shah, Gauranga C. Samanta, Kazuharu Bamba +1
We explore an autonomous system analysis of dark energy models with interactions between dark energy and cold dark matter in a general systematic approach to cosmological fluids. W…
Cosmological bouncing solutions and their stability in teleparallel gravity
Adnan Malik, Aimen Rauf, Kazuharu Bamba +2
The cosmological dynamics in the early universe are investigated to explore the possibility of the sign reversal of the Hubble parameter as a key feature of non-singular bouncing c…
Perturbed gravity coupled with neutrinos: exploring cosmological implications
Muhammad Yarahmadi, Amin Salehi, Kazuharu Bamba +1
We conduct a thorough examination of cosmological parameters within the context of gravity coupled with neutrinos, leveraging a diverse array of observational datasets, incl…
Topological interpretation of extremal and Davies-type phase transitions of black holes
Krishnakanta Bhattacharya, Kazuharu Bamba, Douglas Singleton
Topological arguments are currently being used as a novel scheme to discern the properties of black holes while ignoring their detailed structure and specific field equations. Amon…
Reconstruction of the singularity-free gravity via Raychaudhuri equations
Gaurav N. Gadbail, Simran Arora, P. K. Sahoo +1
We study the bounce cosmology to construct a singularity-free model using the reconstruction technique. The formulation of the model is based on t…
Autonomous systems and attractor behaviors in non-metricity gravity: stability analysis and cosmic acceleration
Pooja Vishwakarma, Parth Shah, Kazuharu Bamba
The cosmological dynamics are rigorously investigated through the systematic application of autonomous system analysis to the gravitational field equations in non-metricity gravity…