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 (266) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (20)
· NED Objects (20)
· Also-Read Articles (Reads History)
· Translate This Page
The circumnuclear environment of nearby, noninteracting Seyfert galaxies
Pogge, Richard W.
AA(Lick Observatory, Santa Cruz, CA)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 345, Oct. 15, 1989, p. 730-751. (ApJ Homepage)
Publication Date:
NASA/STI Keywords:
Active Galactic Nuclei, Galactic Nuclei, Galactic Structure, Seyfert Galaxies, Astronomical Maps, Charge Coupled Devices, H Alpha Line, Ionization, Oxygen
Bibliographic Code:


The conditions that prevail in the regions immediately surrounding the active nuclei in a sample of 20 nearby Seyfert galaxies are reported. Three of the nine Seyfert 1s show extended ionized gas structures in their circumnuclear regions. Eight of the 11 Seyfert 2s show extended ionized gas structures, some with quite complicated and rich morphologies. In the 11 extended-emission Seyferts, one-sided or two-sided distributions of relatively highly ionized emission line gas are seen. In all the cases studied, the forbidden O III-bright regions have spectra consistent with photoionization by a hard-photon spectrum. In the extended-emission Seyfert 1s, the H-alpha + forbidden N II and forbidden O III images have the same morphology, while the Seyfert 2s have different emission morphologies in the two different emission lines. The remaining galaxies are compact, with no suggestion of marginally resolvable nuclear substructure.

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