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Issue A&A Volume 377, Number 3, October III 2001 Page(s) L31 - L34 Section Letters DOI 10.1051/0004-6361:20011209

A&A 377, L31-L34 (2001)
DOI: 10.1051/0004-6361:20011209

The complex iron line of NGC 5506

G. Matt¹, M. Guainazzi², G. C. Perola¹, F. Fiore³, F. Nicastro⁴, M. Cappi⁵ and L. Piro<sup>6

1</sup>  Dipartimento di Fisica, Università degli Studi Roma Tre, Via della Vasca Navale 84, 00146 Roma, Italy
²  XMM-Newton SOC, VILSPA-ESA, Apartado 50727, 28080 Madrid, Spain
³  Osservatorio Astronomico di Roma, Via dell'Osservatorio, 00044 Monteporzio Catone, Italy
⁴  Harvard-Smithsonian Center of Astrophysics, 60 Garden Street, Cambridge MA 02138, USA
⁵  Istituto Tecnologie e Studio Radiazioni Extraterrestri, CNR, Via Gobetti 101, 40129 Bologna, Italy
⁶  Istituto di Astrofisica Spaziale, C.N.R., Via Fosso del Cavaliere, 00133 Roma, Italy

(Received 31 July 2001 / Accepted 29 August 2001 )

Abstract
The bright Narrow Emission Line Galaxy, NGC 5506, has been observed simultaneously by XMM-Newton and BeppoSAX. The iron line is complex, with at least two components: one narrow and corresponding to neutral iron, the second one broad and corresponding to ionized iron. The latter line is equally well fitted by a truly broad line or by a blend of He-and H-like narrow lines. The bulk of the Compton reflection continuum originates in neutral matter, and is therefore associated with the narrow line: they are most likely emitted in distant matter. The origin of the ionized line(s) is less certain, but the solution in terms of a blend of narrow lines from photoionized matter seems to be preferable to emission from an ionized, relativistic accretion disc.

Key words: galaxies: individual: NGC 5506 -- galaxies: Seyfert -- X-rays: galaxies

Offprint request: G. Matt, matt@fis.uniroma3.it

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© ESO 2001

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