22 citations · 100 across the 27 of their papers we have counts for
31 papers
Trace-anomaly decomposition and universal dark matter scaling in compact stars
Adamu Issifu, Constança Providência, Tobias Frederico
We investigate how dark matter (DM) admixture modifies the conformal properties and phase structure of dense neutron-star matter within a self-consistent single-fluid framework, wi…
Effective field theory of scalar glueballs: Form factors and interaction radii
Adamu Issifu, Orlando Oliveira, Tobias Frederico
We develop a gauge-invariant effective field theory for scalar glueball interactions based on the Yang-Mills gluon condensate. Starting from a coherent-state formulation of the Yan…
A self-consistent single-fluid framework for neutron stars admixed with mirror dark matter
Adamu Issifu, Constança Providência, Franciele M. da Silva +2
We develop a self-consistent dark matter admix neutron star framework based on a contact vector current--current interaction that couples the chemical potentials of both sectors th…
A self-consistent Higgs-portal framework for dark matter--admixed neutron stars: Collider-motivated benchmarks meet multimessenger constraints
Adamu Issifu
We investigate dark matter (DM)-admixed neutron stars (NSs) within a self-consistent single-fluid relativistic mean-field framework by extending the Higgs-portal model with a massi…
Rotational enhancement and stability of protoquark stars during thermal evolution
Adamu Issifu, Andreas Konstantinou, Prashant Thakur +1
We present the first systematic study of rigidly rotating protoquark stars based on isentropic equations of state (EOS) within the density-dependent quark mass (DDQM) framework. Us…
Glueballs Confinement and Cosmological Phase Transitions
Adamu Issifu, Julio C. M. Rocha, Francisco A. Brito +1
We develop a unified framework in which the dynamics of a scalar glueball field, originating from phenomenological nonperturbative QCD confinement, simultaneously governs the decon…
Rotational effects in quark stars: comparing different models
Adamu Issifu, Andreas Konstantinou, Franciele M. da Silva +1
We investigate the rotational properties of self-bound strange quark stars using two representative quark matter equations of state (EOS): the vector MIT bag model and the density-…
Dark Matter Heating in Evolving Proto-Neutron Stars: A Two-Fluid Approach
Adamu Issifu, Prashant Thakur, Davood Rafiei Karkevandi +4
Neutron stars (NSs) provide a unique laboratory to probe dark matter (DM) through its gravitational imprint on stellar evolution. We use a two-fluid framework with non-annihilating…
Hyperons and 's in rotating protoneutron stars: Local properties
Franciele M. da Silva, Adamu Issifu, Luis C. N. Santos +2
The structural evolution of rotating protoneutron stars encodes essential information about their observable signatures, while microscopic properties provide complementary knowledg…
Scalarized Hot Neutron Stars Containing Hyperons and -Resonances in Different Evolution Regimes
Fahimeh Rahimi, Zeinab Rezaei, Adamu Issifu
Scalar-tensor gravity models are among the prime candidates to explain cosmic acceleration, and compact stars provide unique laboratories for testing such theories. Predictions of…
Magnetized Proto-Neutron Stars: Structure and Stability
Harsh Chandrakar, Adamu Issifu, Prashant Thakur +2
We investigate the evolution of magnetized protoneutron stars (PNSs) through four schematic stages: neutrino trapped, deleptonization, neutrino transparent, and the final cold, cat…
Rotating Proto-Neutron Stars Admixed with Mirror Dark Matter: A two fluid approach
Adamu Issifu, Andreas Konstantinou, Prashant Thakur +1
This work investigates the impact of mirror dark matter (DM) on the global properties of rotating neutron stars (NSs) across evolutionary stages, from hot, lepton-rich protoneutron…
Proto-neutron Stars with Dark Matter Admixture: A Single-Fluid Approach
Adamu Issifu, Débora P. Menezes, Tobias Frederico
This work investigates the impact of dark matter (DM) on the microscopic and macroscopic properties of proto-neutron stars (PNSs). We employ a single-fluid framework in which DM in…
Radial and Non-Radial Oscillations of Protoneutron Stars with Hyperonic Composition
Prashant Thakur, Adamu Issifu, Ishfaq Ahmad Rather +2
This paper explores radial and non-radial oscillations of protoneutron stars (PNSs) as they evolve from hot, neutrino-rich configurations through deleptonization to cold, catalyzed…
Hyperons and 's in rotating protoneutron stars: Global properties
Franciele M. da Silva, Adamu Issifu, Luis C. N. Santos +2
Rotation plays an important role in the evolution of most types of stars, in particular, it can have a strong influence on the evolution of a newly born proto-neutron star. In this…
Supernova Remnants with Mirror Dark Matter and Hyperons
Adamu Issifu, Prashant Thakur, Franciele M. da Silva +5
For the first time, we use relativistic mean-field (RMF) approximation with density-dependent couplings, adjusted by the DDME2 parameterization, to investigate the effects of dark…
XTE J1814-338 as a dark matter admixed neutron star
Luiz L. Lopes, Adamu Issifu
The existence of the ultracompact object XTE J1814-338, with an inferred mass and radius of = 1.21 0.05 and R = 7.0 0.4 km, presents a great challenge for…
Strongly Interacting Quark Matter in Massive Quark Stars
Adamu Issifu, Franciele M. da Silva, Luis C. N. Santos +2
This paper investigates the properties of strongly coupled matter at high baryon densities (\(ρ_B\)) in quark stars (QSs). The QS model is based on the density-dependent quark mass…
Constraining the Generalized Tolman-Oppenheimer-Volkoff (GTOV) equation with Bayesian analysis
Franciele M. da Silva, Fábio Köpp, Marcelo D. Alloy +4
In this work, we constrain the values of the parameters of the Generalized Tolman-Oppenheimer-Volkoff (GTOV) equation through Bayesian inference. We use the mass and radius data fr…
Proto-neutron stars with quark cores
Adamu Issifu, Débora P. Menezes, Zeinab Rezaei +1
This work investigates the evolution of proto-neutron stars (PNSs) from birth as neutrino-rich objects to maturity as cold-catalyzed neutrino-poor objects with nucleonic and non-nu…
Hot quark matter and merger remnants
Adamu Issifu, Tobias Frederico
This work investigates hot quark matter under the thermodynamic conditions characteristic of a binary neutron star (BNS) merger remnants. We used the density-dependent quark mass m…
Proto-strange quark stars from density-dependent quark mass model
Adamu Issifu, Franciele M. da Silva, Débora P. Menezes
In this paper, we investigate the evolution of strange quark stars (SQS) from birth as proto-strange quark stars to maturity as stable SQSs at a zero temperature. We assume that se…
A Bayesian study of quark models in view of recent astrophysical constraints
Franciele M. da Silva, Adamu Issifu, Luiz L. Lopes +2
In this work, we perform a comparative analysis between the density-dependent quark model and the vector MIT bag model using Bayesian analysis. We use the equations of state genera…
Hybrid Stars Built with Density Dependent Models
A. Issifu, F. M. da Silva, D. P. Menezes
Using a density dependent quark model and a relativistic model within the mean-field approximation for hadrons with density dependent meson-baryon couplings, we construct, for the…