EDP Sciences
Free Access
Issue
A&A
Volume 410, Number 2, November I 2003
Page(s) 471 - 479
Section Galactic structure and dynamics
DOI https://doi.org/10.1051/0004-6361:20031124


A&A 410, 471-479 (2003)
DOI: 10.1051/0004-6361:20031124

The complex FeK line of the Narrow-Line Seyfert 1 galaxy IRAS 13349+2438

A. L. Longinotti1, 2, M. Cappi2, K. Nandra1, M. Dadina2 and S. Pellegrini3

1  Astrophysics Group, Imperial College of Science, Technology and Medicine, Prince Consort Rd. SW7 2AZ, London, UK
2  Istituto IASF-CNR, Sezione di Bologna Via Gobetti 101, 40129 Bologna, Italy
3  Universita' degli studi di Bologna, Dipartimento di Astronomia, via Ranzani 1, 40127 Bologna, Italy

(Received 7 April 2003 / Accepted 24 July 2003)

Abstract
The observation of the Narrow-Line Seyfert 1 galaxy IRAS 13349+2438 performed by XMM-Newton European Photon Imaging Camera between 0.3-10 keV, is presented here. The broadband spectrum of the source is dominated at low energies ( $E \leq2$ keV) by a strong excess of emission and by complex emission/absorption features between ~5.5-8.0 keV. The soft X-ray spectrum is consistent with ionized absorption found by the Reflection Grating Spectrometer (Sako et al. 2001a). We focus on the 2-10 keV spectrum which shows clear evidence for a broad, complex FeK $\alpha$ line, previously unseen by ASCA, and for an Fe K-shell edge detected at ~7.3-7.4 keV (rest-frame). The presence of this edge could be explained by either partial covering or ionized/relativistic reflection models, with the latter being preferred and with a resulting power law slope of $\Gamma \sim 2.2$. The line profile is complex, with a broad bump between ~5.5-6.5 keV and a narrow emission line at ~7 keV, separated by a sharp drop at ~6.8 keV. This profile is compatible with two possible scenarios: i) a broad, ionized and gravitationally redshifted Laor diskline plus a narrow and ionized emission line; ii) a broad, ionized and single Schwarzschild (double-peaked) diskline with a superimposed narrow absorption line.


Key words: X-rays: galaxies -- galaxies: Seyfert -- galaxies: individual: IRAS 13349+2438

Offprint request: A. L. Longinotti, all@imperial.ac.uk

SIMBAD Objects



© ESO 2003

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.