Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· arXiv e-print (arXiv:astro-ph/9608171)
· References in the article
· Citations to the Article (23) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (4)
· NED Objects (1)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Variability of the iron K emission line in the Seyfert 1 galaxy NGC 3516
Authors:
Nandra, K.; Mushotzky, R. F.; Yaqoob, T.; George, I. M.; Turner, T. J.
Affiliation:
AA( Laboratory for High Energy Astrophysics, Code 660, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA ), AB( Laboratory for High Energy Astrophysics, Code 660, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA ), AC( Laboratory for High Energy Astrophysics, Code 660, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA ), AD( Laboratory for High Energy Astrophysics, Code 660, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA ), AE( Laboratory for High Energy Astrophysics, Code 660, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA )
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 284, Issue 2, pp. L7-L10. (MNRAS Homepage)
Publication Date:
01/1997
Origin:
MNRAS
MNRAS Keywords:
ACCRETION, ACCRETION DISCS, GALAXIES: ACTIVE, GALAXIES: INDIVIDUAL: NGC 3516, GALAXIES: NUCLEI, GALAXIES: SEYFERT, X-RAYS: GALAXIES.
Bibliographic Code:
1997MNRAS.284L...7N

Abstract

We present strong evidence for variability of the flux of the iron Kalpha emission line in the Seyfert 1 galaxy NGC 3516. Two ASCA observations, separated by ~1 yr, show a marked decrease in continuum flux by ~60 per cent. The flux in the broad iron Kalpha line decreased by the same factor in this time period, with no evidence for changes in the line profile. The line variability is significant at >99 per cent confidence, and rules out models in which the line is produced in a molecular torus located at >1 pc from the nucleus. An accretion disc is considerably more likely.

Printing Options

Send high resolution image to Level 2 Postscript Printer
Send low resolution image to Level 2 Postscript Printer
Send low resolution image to Level 1 Postscript Printer
Get high resolution PDF image
Get low resolution PDF
Send 300 dpi image to PCL Printer
Send 150 dpi image to PCL Printer

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