TY - GEN A1 - Kaastra, Jelle S. A1 - Paerels, Frits B.S. A1 - Durret, Florence A1 - Schindler, Sabine A1 - Richter, Philipp T1 - Thermal radiation processes T2 - Postprints der Universität Potsdam : Mathematisch Naturwissenschaftliche Reihe N2 - We discuss the different physical processes that are important to understand the thermal X-ray emission and absorption spectra of the diffuse gas in clusters of galaxies and the warm-hot intergalactic medium. The ionisation balance, line and continuum emission and absorption properties are reviewed and several practical examples are given that illustrate the most important diagnostic features in the X-ray spectra. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 891 KW - atomic processes KW - radiation mechanisms: thermal KW - intergalactic medium KW - X-rays: general Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-436220 SN - 1866-8372 IS - 891 SP - 155 EP - 190 ER -