Sign on
ADS Classic is now deprecated. It will be completely retired in October 2019. This page will automatically redirect to the new ADS interface at that point.

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (174) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (38)
· NED Objects (37)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The X-ray Baldwin effect
Authors:
Iwasawa, Kazushi; Taniguchi, Yoshiaki
Affiliation:
AA(Nagoya Univ., Japan), AB(Tohoku Univ., Sendai, Japan)
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 413, no. 1, p. L15-L18. (ApJL Homepage)
Publication Date:
08/1993
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Active Galactic Nuclei, Quasars, Seyfert Galaxies, X Ray Spectra, X Rays, Continuous Spectra, Emission Spectra, Ginga Satellite, Spaceborne Astronomy, Spectral Line Width
DOI:
10.1086/186948
Bibliographic Code:
1993ApJ...413L..15I

Abstract

Using the X-ray data of AGN obtained by the X-ray satellite Ginga, we have found that the equivalent width of the Fe K emission line at 6.4 keV, EW(Fe K), is inversely correlated with the X-ray luminosity in the 2-10 keV band. This inverse correlation is basically similar to the well-known relation known as the 'Baldwin effect', which means that the equivalent width of the C IV 1550 A emission line is inversely correlated with the UV continuum luminosity (Baldwin 1977). Hence, we may call our finding 'the X-ray Baldwin effect'. The X-ray Baldwin effect is pronounced for type 1 Seyfert galaxies. The obtained correlation is quite similar to those of the original Baldwin effects for type 1 Seyfert galaxies and quasars, implying that the Fe K emission mainly comes from the broad-line regions or from the regions whose geometrical configurations are nearly the same as those of broadline regions.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences



More Article Retrieval Options

HELP for Article Retrieval


Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)


Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints