Adeegso tilmaantan si aad u carrabbaabdo ama ugu samayso link qoraalkan http://hdl.handle.net/2307/325
Cinwaan: How complex is the obscuration in active galactic nuclei? new cluesfrom the suzaku monitoring of the x-ray absorbers in ngc 7582
Qore: Bianchi, Stefano
Piconcelli, Enrico
Chiaberge, Marco
Jimenez Bailon, Elena
Matt, Giorgio
Fiore, Fabrizio
Ereyga furaha: XMM-NEWTON
SEYFERT-2 GALAXIES
CIRCINUS GALAXY
COMPTON-THIN
OBSCURED
AGN
QUASARS
LINE
ABSORPTION
NGC-7582
REGIONS
Taariikhda qoraalka: Apr-2009
Tifaftire: IOP Publishing
Abstract: We present the results of a Suzaku monitoring campaign of the Seyfert 2galaxy, NGC 7582. The source is characterized by very rapid (ontimescales even lower than a day) changes of the column density of aninner absorber, together with the presence of constant componentsarising as reprocessing from a Compton-thick material. The best-fittingscenario implies important modifications to the zeroth-order view ofUnified Models. While the existence of a pc-scale torus is needed inorder to produce a constant Compton reflection component and an ironKa-emission line, in this Seyfert 2 galaxy this is not viewed along theline of sight. On the other hand, the absorption of the primarycontinuum is due to another material, much closer to the black hole,roughly at the distance of the broad-line region, which can produce theobserved rapid spectral variability. On top of that, the constantpresence of a 10(22) cm(-2) column density can be ascribed to thepresence of a dust lane, extended on a galactic scale, as previouslyconfirmed by Chandra. There is now mounting evidence that complexity inthe obscuration of active galactic nuclei (AGNs) may be the rule ratherthan the exception. We therefore propose to modify the UnificationModel, adding to the torus the presence of two furtherabsorbers/emitters. Their combination along the line of sight canreproduce all the observed phenomenology.
URI : http://hdl.handle.net/2307/325
ISSN : 0004-637X
DOI : 10.1088/0004-637X/695/1/781
Wuxuu ka dhex muuqdaa ururinnada:A - Articolo su rivista
X_Dipartimento di Fisica 'Edoardo Amaldi'

Fayl ku dhex jira qoraalkan:
Fayl Sifayn BaacFayl Existing users please Login
howcomplex.pdf283.12 kBAdobe PDF Dadkoo dhan looma wada oggol. Waad codsan kartaa koobiga qoraalka!
Muuji xogta qoraalka Ku tali qoraalkan

Page view(s)

36
Last Week
0
Last month
3
checked on Mar 29, 2024

Download(s)

3
checked on Mar 29, 2024

Google ScholarTM

Check

Altmetric

Altmetric


Dhammaan qoraallada lagu kaydiyay DSpace waxay u dhowrsanyihiin xuquuqda qoraha.