Star Formation in the Disk of NGC 5128

Details Star Formation in the Disk of NGC 5128 Star Formation in the Disk of NGC 5128

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.2023f&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #20.23; Bulletin of the American Astronomical Society, Vol. 34, p.1137

Astronomy and Astrophysics

Astronomy

Scientific paper

NGC 5128 (Centaurus A) is the nearest giant elliptical galaxy. It is also the nearest AGN, with a supermassive black hole and a powerful radio source, as well as the nearest galaxy with shells, that contains a central dust lane, and a populous globular cluster system. We present Very Large Telescope (VLT) optical images of the innermost regions of NGC 5128. Deep photometry (B<25) of the sources seen in these BVRI images allows us to make color-magnitude and color-color diagrams. These diagrams reveal a mixture of populations: we identify young stars and blue clusters, plus old globular clusters, embedded in the dusty regions of the NGC 5128 disk. In addition, H-alpha images taken with the 0.9 m telescope at Cerro Tololo Inter-American Observatory show the complex distribution of ionized gas in the disk component. We identify ring-like and arc-like structures, diffuse and discrete HII regions, etc. Based on this dataset, we discuss the star formation history of the disk of this galaxy.

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