This book grew out of the author’s notes from his course on Radiative Processes in High Energy Astrophysics. The course provides fundamental definitions of radiative processes and serves as a brief introduction to Bremsstrahlung and black body emission, relativistic beaming, synchrotron emission and absorption, Compton scattering, synchrotron self-compton emission, pair creation and emission. The final chapter discusses the observed features of Active Galactic Nuclei and their interpretation based on the radiative processes presented in the book. Written in an informal style, this book will guide students through their first encounter with high-energy astrophysics.
RiMembra is a reportage collecting limbs scattered in places and years, connecting them to physical or mental spaces, among which there is no pertinence. Each image comes into being by itself, indipendently, but with a mutilated value which, through its lines of force, even years later, merges into another image. Diptychs and triptychs take shape through chromatic correspondences: the triptych composed of the light seeping into a temple of Taipa (2015) which seems to cross the woman's face in the sauna of Lucrino (2010) and to crash in a lake of San Francisco (2012); or conceptual ones, like the desert land in Palestine (2011), perfectly corresponding to the Wailing Wall in Jerusalem (2014). Different moments reunited over the years that lead to reflection, to the call of mind, generating happy or unhappy memories. Not surprisingly, the theme "Ri" is linked to the noun "membra" (limbs). In this way, the image is able to generate a new one and links develope along the way, creating a paradoxical collage in motion throughout time, which transcends the single still image.
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