Science-advisor
REGISTER info/FAQ
Login
username
password
     
forgot password?
register here
 
Research articles
  search articles
  reviews guidelines
  reviews
  articles index
My Pages
my alerts
  my messages
  my reviews
  my favorites
 
 
Stat
Members: 3643
Articles: 2'487'895
Articles rated: 2609

28 March 2024
 
  » arxiv » astro-ph/0412075

 Article overview


Narrow Iron K$alpha$ Lines in Active Galactic Nuclei: Evolving Populations?
Xin-Lin Zhou & Jian-Min Wang ;
Date 3 Dec 2004
Journal Astrophys.J. 618 (2004) L83-L86
Subject astro-ph
AffiliationIHEP, Beijing) & Jian-Min Wang (IHEP, Beijing
AbstractWe assemble a sample consisting of 66 active galactic nuclei (AGNs) from literature and the {em XMM-Newton} archive in order to investigate the origin of the 6.4 keV narrow iron K$alpha$ line (NIKAL). The X-ray Baldwin effect of the NIKAL is confirmed in this sample. We find the equivalent width ($EW$) of the NIKAL is more strongly inversely correlated with Eddington ratio ($ce$) than the 2-10 keV X-ray luminosity. Our sample favors the origin from the dusty torus and the X-ray Baldwin effect is caused by the changing opening angle of the dusty torus. The relation $EW-ce$ can be derived from a toy model of the dusty torus. If the unification scheme is valid in all AGNs, we can derive the Baldwin effect from the fraction of type {sc ii} AGNs to the total population given by {em Chandra} and {em Hubble} deep surveys. Thus the evolution of populations could be reflected by the NIKAL’s Baldwin effect.
Source arXiv, astro-ph/0412075
Services Forum | Review | PDF | Favorites   
 
Visitor rating: did you like this article? no 1   2   3   4   5   yes

No review found.
 Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

  Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser claudebot






ScienXe.org
» my Online CV
» Free


News, job offers and information for researchers and scientists:
home  |  contact  |  terms of use  |  sitemap
Copyright © 2005-2024 - Scimetrica