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Modelling Synchrotron Outbursts in 3C 273
We present an improved approach to derive the observed evolution of a typical synchrotron outburst in 3C 273. The method consists in a simultaneous...
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Black Hole Formation in Dark Matter Halos
The formation of supermassive black holes is not fully understood. The proposed mechanisms predict the formation of these at late times. We study a...
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Course 12: Evolution of YSO Disks
As stars and planets form from accretion processes in disks, it is important to understand these processes and their evolutionary implications. While...
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Course 13: X-Rays from YSOS: Desperately Seeking the Central Engine
The earliest stages of the evolution of low-mass stars are characterized by the presence of powerful jets, likely originating from accretion via...
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Course 7: Cosmic Rays and Particle Acceleration at Astrophysical Shocks
The acceleration of particles in the vicinity of astrophysical shocks has become the main paradigm in astrophysics for the production of cosmic rays...
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Course 6: Gamma-Ray Bursts
This lecture is an introduction to the study of gamma-ray bursts. Observations of the burst and its afterglow are first reviewed, with the...
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Course 9: Accretion around Active Galactic Nuclei
In bright AGN, at distances of several Schwarzschild radii, the accretion onto a black hole proceeds predominantly in a form of a cool accretion...
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Introduction
We summarize the topics presented in this book, and when appropriate we enlighten cross–references among the different topics: high precision and...
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Quantum Corrections to Scalar Quintessence Potentials
We give a brief introduction into the formalism of the effective action. We use the effective action to investigate the stability of scalar...
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Cosmological Applications of Loop Quantum Gravity
After a brief introduction to classical and quantum gravity we discuss applications of loop quantum gravity in the cosmological realm. This includes...
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The Accelerating Universe and Dark Energy: Evidence from Type Ia Supernovae
I discuss the use of Type Ia supernovae (SNe Ia) for cosmological distance determinations. Low-redshift SNe Ia (...
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Electroweak Baryogenesis and Primordial Hypermagnetic Fields
The origin of the matter-antimatter asymmetry of the universe remains one of the outstanding questions yet to be answered by modern cosmology, and...
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Course 15: Observations of the High Energy $\gamma$ -Ray Universe
This article describes the nature and current status of observational programs studying astrophysical high energy...
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Course 1: Accretion and Ejection-Related MHD
This lecture is an introduction to MHD. Relevant equations, both in the classical and special-relativistic regimes are derived. The magnetic field...
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Course 11: Accretion Signatures in Young Stellar Objects
Mass accretion onto the star is taken place in young stellar objects, providing the energy needed to power the excess emission observed at all...
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Course 8: The Black Hole Environments
Compact objects are astrophysical entities with radii smaller than about 10 Schwarzschild radii. The mass spectrum of these objects ranges from the...
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Internal Structure of Black Holes
Gravitational collapse to a black hole leaves a decaying wake of gravitational waves. Some of those waves are absorbed into the hole and have...
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Quantum Information on the Black Hole Horizon
The scattering matrix approach to the black hole quantization problem is introduced and further elaborated. There appears to be a general concensus...
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Boson Stars in the Centre of Galaxies?
We investigate the possible gravitational redshift values for boson stars with a self-interaction, studying a wide range of possible masses. We find...
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Evidence for Massive Black Holes in the Nuclei of Active Galaxies from Gamma-Ray Observations
According to our present knowledge, Active Galactic Nuclei (AGNs) consist of massive black holes which accrete matter from their environments. By...