Chapter 6


X-ray astronomy

Links to WWW resources

Uhuru X-ray map............................................184 The HEAO A1 all sky map....................................185 Galactic sources: binaries and stars.......................186 Soft X-ray H-R diagrams....................................188 Binary X-ray pulsars.......................................189 X-ray emitting supernova remnants..........................191 Crab Nebula................................................192 X-ray emission from normal galaxies........................193 X-ray emission from clusters of galaxies...................193 X-ray emission from active galaxies........................193 3C 273.....................................................194 Quasar X-ray luminosity....................................195 X-ray source nomogram......................................196 Diffuse X-ray background...................................197 Absorption of X-rays.......................................198 Photoabsorption cross-sections (UV-X-ray).................198 Effective cross-section of the interstellar medium........199 Total photo-ionization cross-section......................200 Photoelectric absorption cross-section....................201 Attenuation of photons in the atmosphere..................203 Photoelectric absorption in the interstellar medium.......204 Spectral features..........................................204 Model X-ray spectral distributions.........................205 Emission lines for low density plasma......................206 Plasma emission - power in lines...........................208 Bibliography...............................................208

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