| Issue |
A&A
Volume 421, Number 2, July II 2004
|
|
|---|---|---|
| Page(s) | 473 - 477 | |
| Section | Extragalactic astronomy | |
| DOI | https://doi.org/10.1051/0004-6361:20047045 | |
| Published online | 22 June 2004 | |
The complex X-ray spectrum of NGC 4507
1
Dipartimento di Fisica, Università degli Studi Roma Tre, via della Vasca Navale 84, 00146 Roma, Italy
2
Observatoire Astronomique, 11 rue de l'Université, 67000 Strasbourg, France
Corresponding author: G. Matt, matt@amaldi.fis.uniroma3.it
Received:
9
January
2004
Accepted:
5
March
2004
XMM-Newton and Chandra/HETG spectra of the Compton-thin
(
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 
cm-2.
Key words: galaxies: individual: NGC 4507 / galaxies: Seyfert / X-rays: galaxies
© ESO, 2004
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