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Displaying 18 authors out of 18
ANDREA FERRARA (S.I.S.S.A., Trieste, Italy)
The physics of early galaxy formation
GIANLUIGI BODO (Osservatorio Astronomico, Torino, Italy)
Numerical simulations of the MRI in the shearing box approximation
GRIGOL GOGOBERIDZE (KU Leuven, Belgium)
Guideline for the problems
INSTRUCTOR: ANDRIA ROGAVA (KU Leuven, Belgium)
(1) Accretion flows in astrophysics (1.1) Binary stars (1.2) Active galactic nuclei, quasars; (1.3) Young stellar objects
(2) Spherical accretion (2.1) Collisionless (Zeldovich-Novikov) spherical accretion (2.2) Hydrodynamic (Bondi) spherical accretion
(3) Nonrelativistic accretion discs (3.1) Basics of disc accretion (3.2) Radiation mechanisms, variability, instabilities
(4) Relativistic accretion discs (4.1) Basics of Schwarzschild and Kerr metrics (4.2) Stress-energy tensor, conservation equations (4.3) Relativistic (Novikov-Thorne) accretion disc
Occurrence and character of astrophysical fluids: (1) temperatures, densities, ionisation and composition of stars, interplanetary medium, ISM, ICM, IGM; (2) distribution of magnetic field; (3) heating and cooling of gas; (4) evolution of cosmic gas from big bang to present day
Hydrostatics of planets, stars and cluster gas motion in astrophysical fluids: (1) convection in stars; (2) stellar winds - de Laval nozzle, Parker solution; (3) transonic flows; (4) implosions (gravitational collapse) and explosions
Shock waves in astrophysical fluids
Accretion flows, disks, jets (basic treatment), description of astrophysical sources with accretion flows
Basic equation of MHD (a) magnetic fields in astrophysics: pictures and general stuff; (b) Maxwell equations - Ohms law - induction equation; (c) flux freezing and diffusion of magnetic fields; (d) examples and applications of flux freezing
Basic MHD and MHD waves (a) The Lorentz force and MHD equations; (b) conservation of energy, magnetic helicity; (c) fast/slow and Alfven waves: Elsasser variables
MHD applications (a) magneto rotational instability, dispersion relation for a simple case - estimates of growth rates - effects of damping - boundaries; (b) stationary axi-symmetric MHD flows
Origin of magnetic fields (a) The generalised Ohm's law; (b) the Biermann battery; (c) Dynamos - mean field dynamo - fluctuation dynamo; (d) application to galaxies and clusters
INSTRUCTOR: SRIDHAR SESHADRI (Raman Ressearch Institute, Bangalore, India)
Introduction: equations of motion; Hydrostatic equilibrium: atmospheres; Steady flow of an ideal fluid; Bernoulli's equation and applications; Vorticity: Circulation theorem; Vortex lines
Potential flows, incompressible potential flows; Gravity waves and instability
Viscous fluids: viscous stress and strain tensors; Navier-Stokes equation: energy dissipation; incompressible fluids; Viscous diffusion of vorticity: boundary layers
Scaling in the NS equations; Flow past obstacles: Stokes flow; Flow past a cylinder: transition to turbulence; Homogeneous, isotropic turbulence
Numerical simulations in astrophysics: the PLUTO code
Basic numerical discretization method: (1) differentiation; (2) integration; (3) interpolation
Theory of linear advection equation: (1) discretization, stability, Upwind method, characteristics; (2) practice session with PLUTO code
Theory of linear hyperbolic systems: (1) Riemann problem; (2) characteristic decomposition
Nonlinear scalar equation: (1) Burger's equation; (2) shocks and rarefactions
Euler equations: (1) characteristics, Riemann problem; (2) exact and approximate solution; (3) practice session (Sod shock tube) with PLUTO; (4) extension to multidimension; (5) practice session (2-D) with PLUTO
KANARIS TSINGANOS (University of Athens, Greece)
Modelling MHD jets and outflows
KANDASWAMY SUBRAMANIAN (IUCAA, Pune, India)
Galactic outflows and the IGM
MAXIM LYUTIKOV (Purdue University, West Lafayette, USA)
Dynamics and dissipation in poynting flux dominated flows
The fundamental importance of cooling flows for galaxy formation
RICHARD V.E. LOVELACE (Cornell University, Ithaca, USA)
Poynting jets and MHD winds from disks of rapidly rotating magnetized stars and black holes
RONY KEPPENS (KU Leuven, Belgium)
Modelling accretion-ejection processes in magnetized young star environments
SANDIP CHAKRABARTI (S.N. Bose National Centre for Basic Sciences, Kolkata, India)
Hydrodynamic and spectral properties of accretion and winds around compact objects: a shocking story
SHIV SETHI (Raman Research Institute, Bangalore, India)
Magnetic fields: Implications for cosmology
Magnetohydrodynamics (MHD): (1) Riemann problem; (2) approx Riemann solver; (3) practice session (Sod shock tube) with PLUTO; (4) -div.B=0
Higher order extension
UE-LI PEN (Canadian Institute for Theoretical Astrophysics, Toronto, Canada)
History and dynamics of the intergalactic medium

Organizers

Directors: D. Bhattacharya, S. Massaglia, A. Rogava, S. Sridhar and K. Subramanian