The origin of the strong soft excess and puzzling iron line complex in Mkn 841

P.O. Petrucci; G. Ponti; G. Matt; L. Maraschi; J. Malzac; M. Mouchet; C. Boisson; K. Nandra; A. Longinotti; P. Ferrando; G. Henri

HAL : in2p3-00184648, version 1

Code Bibliographique ADS : 2007AIPC..924..583P

DOI : 10.1063/1.2774914

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THE MULTICOLORED LANDSCAPE OF COMPACT OBJECTS AND THEIR EXPLOSIVE ORIGINS, Cefalu, Sicile : Italie (2006)

The origin of the strong soft excess and puzzling iron line complex in Mkn 841

P.O. Petrucci¹, G. Ponti, G. Matt², L. Maraschi, J. Malzac³, M. Mouchet^{4, 5}, C. Boisson⁴, K. Nandra, A. Longinotti, P. Ferrando^{5, 6}, G. Henri¹

(2007)

Mkn 841 has been observed during 3 different periods (January 2001, January 2005 and July 2005) by XMM-Newton for a total cumulated exposure time of 108 ks. We present in this paper a broad band spectral analysis of the complete EPIC-pn data sets. These observations confirm the presence of the strong soft excess and complex iron line profile known to be present in this source since a long time. They also reveal their extreme and puzzling spectral and temporal behaviors. Indeed, the 0.5-2 keV soft X-ray flux decreases by a factor 3 between 2001 and 2005 and the line shape appears to be a mixed of broad and narrow components, both variable but on different timescales. The broad-band 0.5-10 keV spectra are well described by a model including a primary power law continuum, a blurred photoionized reflection and a narrow iron line, the blurred reflection fitting self-consistently the soft excess and the broad line component. The origin and nature of the narrow component is unclear.

1 :	LAOG - Laboratoire d'Astrophysique de Grenoble

2 :	Dipartimento di Fisica

3 :	CESR - Centre d'étude spatiale des rayonnements

4 :	LUTH - Laboratoire Univers et Théories

5 :	APC - AstroParticule et Cosmologie

6 :	DAPNIA - Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée

équipe(s) de recherche : APC - Cosmologie et gravitation
APC - AHE

Thème(s)

Planète et Univers/Astrophysique

Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique

Mot(s)-clé(s) : active galaxies – X-ray sources (astronomical)


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Contributeur : Simone Lantz <>
Soumis le : Samedi 3 Novembre 2007, 15:46:45
Dernière modification le : Mardi 19 Juin 2012, 17:44:54