Deep Submillimeter Imaging of Dust Structures in Centaurus A

Details Deep Submillimeter Imaging of Dust Structures in Centaurus A Deep Submillimeter Imaging of Dust Structures in Centaurus A

2001-10-22

arxiv.org/abs/astro-ph/0110476v1

Astronomy and Astrophysics

Astrophysics

14 pages; 6 Gif (4 color) and 2 Postscript figures; Tentatively scheduled to appear in the v565 n1 ApJ January 20, 2002 issue

Scientific paper

10.1086/324494

Images covering the central 450 by 100 arcsecond (about 8.0 by 2.0 kpc) of NGC 5128 (Centaurus A) obtained using SCUBA at 850 and 450 micron with beam sizes of 14.5 and 8 arcsecond respectively, are presented. These data are compared with those obtained at other wavelengths, in particular the optical, mid-infrared, and far-infrared continuum. The sensitive 850 and 450 micron images show that the submillimeter (submm) continuum morphology and spectral index distribution of Centaurus A comprise four regions: an unresolved AGN core, an inner jet interacting with gas in the dust lane, an inner disk of radius roughly 90 arcsecond, and colder outer dust. The inner disk has a high surface brightness, reverse-S-shaped feature in the 850 and 450 micron images that coincides with the regions of intense 7 and 15 micron continuum and a region of active star-formation. The infrared (IR) and submm images appear to reveal the same material as predicted by a geometric warped disk model consisting of tilted rings. We suggest this scenario is more plausible than that recently proposed in literature suggesting that the mid-IR emission in Centaurus A is primarily from a bar, with a structure that is different from the extended warped disk alone. A dust mass total of 2.2 million solar masses has been calculated within a radius of 225 arcsecond, 45% of which is in the star-forming region of radius about 90 arcsecond about the nucleus.

Affiliated with

Also associated with

No associations

Rating

Deep Submillimeter Imaging of Dust Structures in Centaurus A does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Deep Submillimeter Imaging of Dust Structures in Centaurus A, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Deep Submillimeter Imaging of Dust Structures in Centaurus A will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-232844