Dust Lanes, Nuclear Dusty Disks, and Isophotal Properties as Observed by HST: What Do They Tell Us about the 3-D Structure of Elliptical Radio Galaxy Hosts?

Details Dust Lanes, Nuclear Dusty Disks, and Isophotal Properties as Observed by HST: What Do They Tell Us about the 3-D Structure of Elliptical Radio Galaxy Hosts? Dust Lanes, Nuclear Dusty Disks, and Isophotal Properties as Observed by HST: What Do They Tell Us about the 3-D Structure of Elliptical Radio Galaxy Hosts?

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.7211t&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #72.11; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

Scientific paper

We investigate isophotal properties and dust morphology in the nuclear regions of 3CR radio galaxies, imaged in the optical and near-infrared as part of Hubble Space Telescope snapshot surveys. We present a sample-wide correlation between host galaxy isophotal structure and the inclination of dusty circumnuclear disks at the centers of these objects. We find that galaxies containing edge-on disks are invariably seen to possess boxy isophotes, while round, face-on disks are seen almost exclusively in objects with round or largely elliptical isophotes. Dust-rich sources with disky isophotes are observed only to possess dust in the form of lanes or clumpy patches, and not in settled distributions like disks. Such a correlation might allow us to not only interpolate the three-dimensional structure of the elliptical host, but also to draw a connection between the host and the post-merger activity of the dust within it. While host galaxy isophotal properties seem strongly coupled to dust distribution, there is no apparent connection to radio flux from the core.

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