Viscous Dark Energy Accretion Activities : Sonic Speed, Angular Momentum and Mach Number Studies

Abstract

In this present article, we study different accretion properties regarding viscous accretion of dark energy. Modified Chaplygin gas is chosen as the dark energy candidate. Viscosity is encountered with the help of Shakura-Sunyaev viscosity parameter. We study sonic speed vs radial distance curves. We compare between adiabatic and dark energy dominated cases and follow that sonic speed falls as we go nearer to the central gravitating object. As viscosity is imposed, a threshold drop in accretion sonic speed is followed. Average rate of fall in accretion sonic speed is increased with black hole's spin. This is signifying that this kind of accretion is weakening the overall matter/energy infall. Specific angular momentum to Keplerian angular momentum ratio is found to fall as we go far from the black hole. Accretion Mach number turns high as we go towards the inner region and high wind Mach number is not allowed as we are going out. Combining, we conclude that the system weakens the feeding process of accretion.

arXiv comment19 pages, 18 figures

References in corpus (36)

• Planck 2015 results. XIII. Cosmological parameters
• Dynamics of dark energy
• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• Quintessence, Cosmic Coincidence, and the Cosmological Constant
• Concentrations of Dark Halos from their Assembly Histories
• Quintessence and the Rest of the World
• The Merger Rates and Mass Assembly Histories of Dark Matter Haloes in the Two Millennium Simulations
• Interacting Dark Matter and Dark Energy
• How to Plant a Merger Tree
• The Universal Mass Accretion History of CDM Haloes
• Gravitational Bose-Einstein condensation in the kinetic regime
• Cosmological Evolution With Interaction Between Dark Energy And Dark Matter
• Evidence for non-evolving FeII/MgII ratios in rapidly accreting z~6 QSOs
• Dark matter, dark energy, and alternate models: A review
• Mass Accretion Rates and Histories of Dark Matter Haloes
• Self-similar cosmological solutions with a non-minimally coupled scalar field
• The Accretion of Dark Energy onto a Black Hole
• The structure of dark matter halos in hierarchical clustering theories
• Environmental Dependence of Dark Matter Halo Growth I: Halo Merger Rates
• Structure Formation With a Long-Range Scalar Dark Matter Interaction
• Description of Pseudo-Newtonian Potential for the Relativistic Accretion Disk around Kerr Black Holes
• Dark Matter Halo Growth II: Diffuse Accretion and its Environmental Dependence
• Accretion discs around black holes: two dimensional, advection cooled flows
• On the Accretion Rates and Radiative Efficiencies of the Highest Redshift Quasars
• Dark-Matter-Induced Weak Equivalence Principle Violation
• Inferences on the Relations Between Central Black Hole Mass and Total Galaxy Stellar Mass in the high-redshift Universe
• Interaction between dark energy and dark matter: observational constraints from OHD, BAO, CMB and SNe Ia
• A model for a dark matter core at the galactic center
• Late Decaying Dark Matter, Bulk Viscosity and the Cosmic Acceleration
• Model Dependence of Transonic Properties of Accretion Flows Around Black Holes
• The role of flow geometry in influencing the stability criteria for low angular momentum axisymmetric black hole accretion
• Accretion of Chaplygin gas upon black holes: Formation of faster outflowing winds
• Search for Missing Links Between Two Extreme Wind Speed Profiles : Dark Energy Accretion and Adiabatic Fluid Accretion
• Fate of an Accretion Disc around a Black Hole when both the Viscosity and Dark Energy is Effecting
• Threshold Drop in Accretion Density if Dark Energy is Accreting onto a Supermassive Black Hole
• Violation of Universal Lower Bound for the Shear Viscosity to Entropy Density Ratio in Dark Energy Dominated Accretion