Circular orbit
View article: Interferometric Detection and Orbit Modeling of the Subcomponent in the Hot-dust System $κ$ Tuc A: A Low-mass Star on an Eccentric Orbit in a Hierarchical-quintuple System
Interferometric Detection and Orbit Modeling of the Subcomponent in the Hot-dust System $κ$ Tuc A: A Low-mass Star on an Eccentric Orbit in a Hierarchical-quintuple System Open
The system $κ$ Tuc A is part of a hierarchical-quintuple system and is a prime target for studies of hot-exozodiacal dust, because a time-variable near-infrared excess has been detected. We observed the system with the Multi Aperture mid-I…
View article: Paper 5 - Circular Prime Symmetry: Closed Rotational Orbits in the Prime System v0.1
Paper 5 - Circular Prime Symmetry: Closed Rotational Orbits in the Prime System v0.1 Open
Circular Prime Symmetry introduces the first fully characterizable coherence-stable species inside the prime landscape. A circular prime is a prime that remains prime under all cyclic rotations of its digits, forming a closed rotational or…
View article: Paper 5 - Circular Prime Symmetry: Closed Rotational Orbits in the Prime System v0.1
Paper 5 - Circular Prime Symmetry: Closed Rotational Orbits in the Prime System v0.1 Open
Circular Prime Symmetry introduces the first fully characterizable coherence-stable species inside the prime landscape. A circular prime is a prime that remains prime under all cyclic rotations of its digits, forming a closed rotational or…
View article: Closed-Loop Control Law for Low Thrust Orbit Transfer with Guaranteed Stability
Closed-Loop Control Law for Low Thrust Orbit Transfer with Guaranteed Stability Open
Electric propulsion is used to maximize payload capacity in communication satellites. These orbit raising maneuvers span several months and hundreds of revolutions, making trajectory design a complex challenge. The literature typically add…
View article: Closed-Loop Control Law for Low Thrust Orbit Transfer with Guaranteed Stability
Closed-Loop Control Law for Low Thrust Orbit Transfer with Guaranteed Stability Open
Electric propulsion is used to maximize payload capacity in communication satellites. These orbit raising maneuvers span several months and hundreds of revolutions, making trajectory design a complex challenge. The literature typically add…
View article: Electromagnetic radiation from circular orbits in Schwarzschild--de Sitter spacetime
Electromagnetic radiation from circular orbits in Schwarzschild--de Sitter spacetime Open
We investigate the electromagnetic radiation emitted by a charged particle orbiting a four-dimensional Schwarzschild--de Sitter black hole using a semiclassical approach. We calculate the probability amplitude for the charged particle to e…
View article: a metric describing gravitational field energy
a metric describing gravitational field energy Open
We consider spherically symmetrical stationary, spatially extended mass distributions such as elliptical galaxies and, as a limit case, spatially limited masses such as the sun in the planetary system and ask for the positions, at which th…
View article: Tidal forces around the Letelier-Alencar cloud of strings black hole
Tidal forces around the Letelier-Alencar cloud of strings black hole Open
In this work, we investigate relativistic tidal forces around a black hole sourced by a cloud of strings, described by the generalized Letelier-Alencar solution. We first review the original Letelier spacetime and its recent generalization…
View article: a metric describing gravitational field energy
a metric describing gravitational field energy Open
We consider spherically symmetrical stationary, spatially extended mass distributions such as elliptical galaxies and, as a limit case, spatially limited masses such as the sun in the planetary system and ask for the positions, at which th…
View article: **THE BDG REVOLUTION: GRAVITY DOES NOT EXIST — ONLY ENERGY UNITY EXISTS**
**THE BDG REVOLUTION: GRAVITY DOES NOT EXIST — ONLY ENERGY UNITY EXISTS** Open
THE BDG REVOLUTION: Gravity Does Not Exist — Only Energy Unity Exists cDr. Irfan Boko — Halkın Sesi Benim Işığım Series (2025)Boko Dual Gravity (BDG) / The Energy Unity Principle Abstract:This work introduces a radically new perspective on…
View article: **THE BDG REVOLUTION: GRAVITY DOES NOT EXIST — ONLY ENERGY UNITY EXISTS**
**THE BDG REVOLUTION: GRAVITY DOES NOT EXIST — ONLY ENERGY UNITY EXISTS** Open
THE BDG REVOLUTION: Gravity Does Not Exist — Only Energy Unity Exists cDr. Irfan Boko — Halkın Sesi Benim Işığım Series (2025)Boko Dual Gravity (BDG) / The Energy Unity Principle Abstract:This work introduces a radically new perspective on…
View article: Gravity as a Refractive Phenomenon of a Fundamental Time Oscillator
Gravity as a Refractive Phenomenon of a Fundamental Time Oscillator Open
This paper presents a conceptual framework for gravity in which spacetime curvature is replaced by variations in the optical density of a flat, Euclidean vacuum. The fundamental dynamical variable is the local frequency of a scalar time os…
View article: Off-Equatorial Orbits around Magnetically Charged Black Holes
Off-Equatorial Orbits around Magnetically Charged Black Holes Open
We present a complete characterization of stable, off-equatorial circular orbits around magnetically charged black holes (MBHs). For a static, spherically symmetric MBH, we derive an exact analytic expression for the orbital latitude theta…
View article: Off-Equatorial Orbits around Magnetically Charged Black Holes
Off-Equatorial Orbits around Magnetically Charged Black Holes Open
We present a complete characterization of stable, off-equatorial circular orbits around magnetically charged black holes (MBHs). For a static, spherically symmetric MBH, we derive an exact analytic expression for the orbital latitude theta…
View article: Gravity as a Refractive Phenomenon of a Fundamental Time Oscillator
Gravity as a Refractive Phenomenon of a Fundamental Time Oscillator Open
This paper presents a conceptual framework for gravity in which spacetime curvature is replaced by variations in the optical density of a flat, Euclidean vacuum. The fundamental dynamical variable is the local frequency of a scalar time os…
View article: Black Hole Spin Estimation with Time-variable Image of M87 During the Flaring State
Black Hole Spin Estimation with Time-variable Image of M87 During the Flaring State Open
By investigating the time-variable 230 GHz images using ray-tracing general relativistic radiative transfer calculation, we propose a novel method for estimating the spin parameter of the supermassive black hole at the M87 center by utiliz…
View article: Black Hole Spin Estimation with Time-variable Image of M87 During the Flaring State
Black Hole Spin Estimation with Time-variable Image of M87 During the Flaring State Open
By investigating the time-variable 230 GHz images using ray-tracing general relativistic radiative transfer calculation, we propose a novel method for estimating the spin parameter of the supermassive black hole at the M87 center by utiliz…
View article: Frame-Dragging Effects on Innermost Stable Circular Orbits in Kerr Spacetimes: Implications for Gravitational Wave Astronomy
Frame-Dragging Effects on Innermost Stable Circular Orbits in Kerr Spacetimes: Implications for Gravitational Wave Astronomy Open
This paper investigates the role of frame-dragging in stabilizing innermost stable circular orbits (ISCOs) around rotating black holes described by the Kerr metric. We examine how the absence of rotation leads to orbital instability and un…
View article: Jet Collimation, Helical Geometry, and UHECR Acceleration from a Single PG Metric
Jet Collimation, Helical Geometry, and UHECR Acceleration from a Single PG Metric Open
Astrophysical jets exhibit universal geometric features---narrow opening angles, long coherent helices, and bipolar symmetry---across a wide range of systems. In this paper we show that these properties arise naturally from the stationary …
View article: Frame-Dragging Effects on Innermost Stable Circular Orbits in Kerr Spacetimes: Implications for Gravitational Wave Astronomy
Frame-Dragging Effects on Innermost Stable Circular Orbits in Kerr Spacetimes: Implications for Gravitational Wave Astronomy Open
This paper investigates the role of frame-dragging in stabilizing innermost stable circular orbits (ISCOs) around rotating black holes described by the Kerr metric. We examine how the absence of rotation leads to orbital instability and un…
View article: Jet Collimation, Helical Geometry, and UHECR Acceleration from a Single PG Metric
Jet Collimation, Helical Geometry, and UHECR Acceleration from a Single PG Metric Open
Astrophysical jets exhibit universal geometric features---narrow opening angles, long coherent helices, and bipolar symmetry---across a wide range of systems. In this paper we show that these properties arise naturally from the stationary …
View article: Gravitational wave radiation from periodic orbits and quasi-periodic oscillations in an Einstein nonlinear Maxwell–Yukawa black hole
Gravitational wave radiation from periodic orbits and quasi-periodic oscillations in an Einstein nonlinear Maxwell–Yukawa black hole Open
In this article, we investigate the orbital dynamics and quasi-periodic oscillations (QPOs) surrounding a static, spherically symmetric geometry of an Einstein–nonlinear Maxwell–-Yukawa (ENLMY) black hole (BH). Using the Hamiltonian formal…
View article: Orbital rotation of spheroidal Mie particles driven by counter-propagating circularly-polarized beams
Orbital rotation of spheroidal Mie particles driven by counter-propagating circularly-polarized beams Open
We theoretically consider orbital rotation of a spheroidal submicron particle in the field of two counter-propagating circularly polarized Gaussian beams. We derived equations connecting the parameters of the circular orbits centered on th…
View article: Preliminary investigation of cislunar disposal reachability via electric propulsion for selected $$L_2$$ lagrange point orbit families
Preliminary investigation of cislunar disposal reachability via electric propulsion for selected $$L_2$$ lagrange point orbit families Open
This paper investigates the disposal of end-of-life spacecraft from selected orbit families in the Earth-Moon system, specifically the $$L_2$$ Lyapunov and Halo families. Rather than focusing on impulsive burns with chemical propulsion sys…
View article: Reproduction package for the paper "Rethinking mass transfer: a unified semi-analytical framework for circular and eccentric binaries. I. Orbital evolution due to conservative mass transfer"
Reproduction package for the paper "Rethinking mass transfer: a unified semi-analytical framework for circular and eccentric binaries. I. Orbital evolution due to conservative mass transfer" Open
This is a basic reproduction package for the paper "Rethinking mass transfer: a unified semi-analytical framework for circular and eccentric binaries. I. Orbital evolution due to conservative mass transfer" by Parkosidis et al. (2025). It …
View article: Reproduction package for the paper "Rethinking mass transfer: a unified semi-analytical framework for circular and eccentric binaries. I. Orbital evolution due to conservative mass transfer"
Reproduction package for the paper "Rethinking mass transfer: a unified semi-analytical framework for circular and eccentric binaries. I. Orbital evolution due to conservative mass transfer" Open
This is a basic reproduction package for the paper "Rethinking mass transfer: a unified semi-analytical framework for circular and eccentric binaries. I. Orbital evolution due to conservative mass transfer" by Parkosidis et al. (2025). It …
View article: A Validity Map for the Gravitational Bohr Model: Reduced-Mass Algebra, Closed-Form Thresholds, and Applicability
A Validity Map for the Gravitational Bohr Model: Reduced-Mass Algebra, Closed-Form Thresholds, and Applicability Open
This paper uses a gravitational version of the Bohr model as a bounded worked example to teach semiclassical quantization, scaling, and the role of dimensionless parameters. We present a nonrelativistic, Bohr-style treatment with a fully a…
View article: Orbital rotation of spheroidal Mie particles driven by counter-propagating circularly-polarized beams
Orbital rotation of spheroidal Mie particles driven by counter-propagating circularly-polarized beams Open
We theoretically consider orbital rotation of a spheroidal submicron particle in the field of two counter-propagating circularly polarized Gaussian beams. We derived equations connecting the parameters of the circular orbits centered on th…
View article: TOI-7510: A solar-analog system of three transiting giant planets near a Laplace resonance chain
TOI-7510: A solar-analog system of three transiting giant planets near a Laplace resonance chain Open
Posterior samples Posterior samples from the photodynamical modeling.Filename: TOI-7510_Almenara2025_posterior.csvColumns: G: N-body gravitational constant (au^3 day^-2 M_Sun^-1) Tref: Reference time for the orbital elements (BJD_TDB) time…
View article: TOI-7510: A solar-analog system of three transiting giant planets near a Laplace resonance chain
TOI-7510: A solar-analog system of three transiting giant planets near a Laplace resonance chain Open
Posterior samples Posterior samples from the photodynamical modeling.Filename: TOI-7510_Almenara2025_posterior.csvColumns: G: N-body gravitational constant (au^3 day^-2 M_Sun^-1) Tref: Reference time for the orbital elements (BJD_TDB) time…