Hubble Space Telescope observations of nearby radio-loud early-type galaxies

Show full item record

Title: Hubble Space Telescope observations of nearby radio-loud early-type galaxies
Author: Kleijn, Gijs; Baum, Stefi; de Zeeuw, P. Tim; O'Dea, Christopher
Abstract: We present and analyse HST/WFPC2 broad- and narrow-band observations of the central regions of 19 nearby radio-loud early-type galaxies. Together with two more galaxies they form a complete sample of Fanaroff & Riley Type I galaxies. We obtained V - and I-band images and narrow-band images centered on the H-alpha+[NII] emission lines. We use archival data for six galaxies. We describe the data reduction, give isophotal fits and analyse the central emission-line gas and dust distributions. Our main conclusions are the following. Although obscuration by dust inhibits a direct determination of central cusp slopes, the data suggest most but not all galaxies have shallow cores. Dust is detected in all but two galaxies. There is a wide variety of central dust morphologies, ranging from central disks to lanes and irregular distributions. The analysis suggests the difference between disks and lanes is intrinsic and not due to different viewing angles. Central emission-line gas is detected in all galaxies. Extended low-surface-brightness emission is always associated with the dust features. In a subsequent paper we will present a detailed analysis of the relation between these central properties and the nuclear activity (Refer to PDF file for exact formulas).
Description: Also archived in: arXiv: astro-ph/9909256 v1 15 Sep 1999
Record URI:
Date: 1999-12

Files in this item

Files Size Format View
SBaumArticle12-1999.pdf 1.265Mb PDF View/Open

The following license files are associated with this item:

This item appears in the following Collection(s)

Show full item record

Search RIT DML

Advanced Search