caa a22 4500 469077271 CHVBK 20180323132938.0 cr unu---uuuuu 170328e19920901xx s 000 0 eng 10.1007/BF02507857 doi (NATIONALLICENCE)springer-10.1007/BF02507857 X-ray signatures of cold accretion disks in AGNs [Elektronische Daten] [G. Matt, G. Perola, L. Piro] Summary: We have calculated, by means of Monte Carlo simulations, the properties of the radiation emerging from an X-ray illuminated cold accretion disk. These calculations can apply to AGNs, for which there is evidence of cold, optically thick matter near the central black hole. The resulting spectra show an intense iron fluorescent line and a high-energy bump above about 10 keV, where the scattering becomes important with respect to the photoabsorption; these features have been observed by GINGA in some bright Seyfert 1 galaxies. Our detailed results are indicative of the type of future observations which would lead to estimates of the geometrical parameters of the disk, its iron abundance and the mass of the black hole. Società Italiana di Fisica, 1992 X-ray sources nationallicence Matt G. Istituto Astronomico, Università «La Sapienza», Via G. Lancisi 29, 00161, Roma, Italia aut Perola G. Istituto Astronomico, Università «La Sapienza», Via G. Lancisi 29, 00161, Roma, Italia aut Piro L. Istituto di Astrofisica Spaziale, CNR, Via E. Fermi 23, 00044, Frascati, Italia aut Il Nuovo Cimento C Kluwer Academic Publishers 15/5(1992-09-01), 825-829 0390-5551 15:5<825 1992 15 11543 https://doi.org/10.1007/BF02507857 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02507857 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Matt G. Istituto Astronomico, Università «La Sapienza», Via G. Lancisi 29, 00161, Roma, Italia aut NATIONALLICENCE 700 1- Perola G. Istituto Astronomico, Università «La Sapienza», Via G. Lancisi 29, 00161, Roma, Italia aut NATIONALLICENCE 700 1- Piro L. Istituto di Astrofisica Spaziale, CNR, Via E. Fermi 23, 00044, Frascati, Italia aut NATIONALLICENCE 773 0- Il Nuovo Cimento C Kluwer Academic Publishers 15/5(1992-09-01), 825-829 0390-5551 15:5<825 1992 15 11543 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer