XMM-Newton and Chandra/HETG spectra of the Compton-thin (N-H similar to 4 x 10(23) cm(-2)) Seyfert 2 galaxy, NGC 4507, are analyzed and discussed. The main results are: a) the soft X-ray emission is rich in emission lines; an (at least) two-zone photoionization region is required to explain the large range of ionization states; b) the 6.4 keV iron line is likely emitted from Compton-thick matter, implying the presence of two circumnuclear cold regions, one Compton-thick (the emitter), one Compton-thin (the cold absorber); c) evidence of an Fe xxv absorption line is found in the Chandra/HETG spectrum. The column density of the ionized absorber is estimated to be a few x 10(22) cm(-2).
The complex X-ray spectrum of NGC 4507 / Matt G; Bianchi S; DAmmando F; Martoccia A. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - STAMPA. - 421:2(2004), pp. 473-477. [10.1051/0004-6361:20047045]
The complex X-ray spectrum of NGC 4507
D'AMMANDO, FILIPPO;
2004
Abstract
XMM-Newton and Chandra/HETG spectra of the Compton-thin (N-H similar to 4 x 10(23) cm(-2)) Seyfert 2 galaxy, NGC 4507, are analyzed and discussed. The main results are: a) the soft X-ray emission is rich in emission lines; an (at least) two-zone photoionization region is required to explain the large range of ionization states; b) the 6.4 keV iron line is likely emitted from Compton-thick matter, implying the presence of two circumnuclear cold regions, one Compton-thick (the emitter), one Compton-thin (the cold absorber); c) evidence of an Fe xxv absorption line is found in the Chandra/HETG spectrum. The column density of the ionized absorber is estimated to be a few x 10(22) cm(-2).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
