caa a22 4500 469077026 CHVBK 20180323132937.0 cr unu---uuuuu 170328e19920901xx s 000 0 eng 10.1007/BF02507858 doi (NATIONALLICENCE)springer-10.1007/BF02507858 X-Ray emission from two-phase accretion disks [Elektronische Daten] [F. Haardt, L. Maraschi] Summary: We consider a <<two phase>> accretion disk consisting of an optically thick layer with temperatureT≃104 K embedded in a hot thin corona (T≃109 K). The main energy input occurs through magnetic heating of the electrons in the corona, while cooling is due to Compton losses of the hot electrons on the soft photons provided by the thick layer. We write the balance equations for the two phases. We show that a possible mode of variability yields steeper spectra for increasing soft-photon luminosity as observed in Seyfert galaxies and compute composite model spectra in the X-ray range, via Monte Carlo simulations. Società Italiana di Fisica, 1992 Galaxies nationallicence extragalactic objects and systems (by type) nationallicence X-rays nationallicence Haardt F. Dipartimento di Fisica, Università di Milano, Italia aut Maraschi L. Dipartimento di Fisica, Università di Milano, Italia aut Il Nuovo Cimento C Kluwer Academic Publishers 15/5(1992-09-01), 831-837 0390-5551 15:5<831 1992 15 11543 https://doi.org/10.1007/BF02507858 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02507858 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Haardt F. Dipartimento di Fisica, Università di Milano, Italia aut NATIONALLICENCE 700 1- Maraschi L. Dipartimento di Fisica, Università di Milano, Italia aut NATIONALLICENCE 773 0- Il Nuovo Cimento C Kluwer Academic Publishers 15/5(1992-09-01), 831-837 0390-5551 15:5<831 1992 15 11543 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer