Accretion Disk Winds

These publications were done using Sijham's Hydro Code, an advance hydrodynamic code that I developed. If you have any question about this code please don't hesitate to contact me.

• Hydrodynamical Models of Line-Driven Accretion Disk Winds
• Hydrodynamic Models of Line-Driven Accretion Disks Winds. II Adiabatic Winds From Nonisothermal Disks
• Hydrodynamic Models of Line-Driven Accretion Disk Winds. III. Local Ionization Equilibrium
• On The Steady Nature of Line-Driven Disk Winds
• Further Criteria for the Existence of Steady Line-Driven Winds
• On The Steady Nature of Line-Driven Disk Winds: Application to Cataclysmic Variables

Radiative Transfer

A new radiative transfer method “Short-N Characteristics” that is a hybrid between the standard long characteristic methods and the standard short characteristic methods.

• Short-N characteristic radiative transfer method in 2D cylindrical RZ coordinates

QSOs

Using Sloan Digital Sky Survey (SDSS) QSO spectra taken at multiple epochs, we find that the composite flux differences in the rest-frame wavelength range 1300–6000 Å can be fit by a standard thermal accretion disk model in which the accretion rate has changed from one epoch to the next (without considering additional continuum emission components).

• Spectral Variability of Quasars in the Sloan Digital Sky Survey. I. Wavelength Dependence
• Characteristic QSO Accretion Disk Temperatures from Spectroscopic Continuum Variability

Unigrav

The main theoretical purpose of this research is to exhibit gravitation as a particular form of interaction between matter and light (and more generally radiation), within the framework of Special Relativity, but in a manner wholly independent of Einstein's General Theory.

• Wheeler's Gravitomagnetism Revisited I: A Purely Lorentz-Compton Approach to Vector Gravitational Waves and Trio-Holes