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Globular Clusters and Planetary Nebula Kinematics in NGC 5128 (Cen A)

Published online by Cambridge University Press:  03 August 2017

Eric W. Peng ,
Holland C. Ford  and
Kenneth C. Freeman
Eric W. Peng
Affiliation:
The Johns Hopkins University, Department of Physics and Astronomy, Baltimore, MD, 21218, USA
Holland C. Ford
Affiliation:
The Johns Hopkins University, Department of Physics and Astronomy, Baltimore, MD, 21218, USA
Kenneth C. Freeman
Affiliation:
RSAA, Australian National University, Canberra, Australia

Abstract

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We have conducted a wide-field optical survey of NGC 5128 (Cen A), the nearest large elliptical galaxy (3.5 Mpc). From UBVRI imaging and spectroscopic follow-up, we have identified and obtained kinematics for 125 new globular clusters out to a projected radius of 40 kpc. We also extend our survey of field star kinematics in NGC 5128, and now possess a total of 736 radial velocities for planetary nebulae out to a projected radius of 80 kpc.

  1. • The PNe sample along the photometric major axis shows significant rotational support out to 80 kpc.

  2. • The blue globular clusters seem to possess little or no angular momentum.

  3. • The kinematics of the red globular cluster sample show some evidence for rotation around an axis common to that of the field stars.

Type
Part 2. Globular Cluster Systems of Distant Galaxies
Information
Symposium - International Astronomical Union , Volume 207: Extragalactic Star Clusters , 2002 , pp. 312 - 314
Copyright
Copyright © Astronomical Society of the Pacific 2002 

References

Harris, G., Geisler, D., Harris, H., & Hesser, J. 1992, AJ, 287, 175 Google Scholar
Hui, X., Ford, H. C., Freeman, K. C. & Dopita, M. A. 1995, ApJ, 449, 592 Google Scholar