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)
· References in the article
· Citations to the Article (208) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (1)
· NED Objects (1)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Multidirectional views of the active nucleus of NGC 1068
Authors:
Miller, J. S.; Goodrich, R. W.; Mathews, William G.
Affiliation:
AA(Lick Observatory, Santa Cruz, CA), AB(Lick Observatory, Santa Cruz, CA), AC(Lick Observatory, Santa Cruz, CA)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 378, Sept. 1, 1991, p. 47-64. Research supported by University of California. (ApJ Homepage)
Publication Date:
09/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ACTIVE GALACTIC NUCLEI, ASTRONOMICAL POLARIMETRY, SEYFERT GALAXIES, ASTRONOMICAL SPECTROSCOPY, CHARGE COUPLED DEVICES, COSMIC DUST, ELECTRON SCATTERING, LUMINOSITY
DOI:
10.1086/170406
Bibliographic Code:
1991ApJ...378...47M

Abstract

Previous observations and interpretations of spectropolarimetry of the type-2 Seyfert galaxy NGC 1068 are validated and extended. Specifically, imaging polarimetry reveals the existence of a highly polarized knot some 4.7 arcsec to the northeast of the nucleus, and spectropolarimetric observations of the knot indicate that it is a dusty region reflecting light from the nucleus. The observational data are used to constrain a theoretical model for the electron-scattering region. A conical electron-scattering region is assumed, and it is found that a cone-opening half-angle of about 30 deg viewed from an angle of 32 deg is consistent with the observations, with the inner radius of the scattering region about 10 to the 20th cm from the nucleus, the electron density about 400-600/cu cm, and the mean electron temperature about 200,000 to 300,000 K. It is suggested that, since the luminosity necessary to maintain the required ionization level is larger than the observed bolometric luminosity, the continuum source is inherently anisotropic.

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
    


SAO/NASA ADS Homepage | ADS Sitemap | Query Form | Basic Search | Preferences | HELP | FAQ