Hostname: page-component-78c5997874-94fs2 Total loading time: 0 Render date: 2024-11-01T20:09:14.029Z Has data issue: false hasContentIssue false
  • English
  • Français

Globular Clusters as Probes of the Virgo gE NGC 4472

Published online by Cambridge University Press:  26 May 2016

Terry Bridges ,
Keith Ashman ,
Mike Beasley ,
Doug Geisler ,
Dave Hanes ,
Ray Sharpies  and
Steve Zepf
Terry Bridges
Affiliation:
1Anglo-Australian Observatory
Keith Ashman
Affiliation:
2University of Kansas
Mike Beasley
Affiliation:
3University of Durham
Doug Geisler
Affiliation:
4Concepcion University
Dave Hanes
Affiliation:
5Queen's University
Ray Sharpies
Affiliation:
3University of Durham
Steve Zepf
Affiliation:
6Yale

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We present radial velocities for 144 globular clusters (GCs) around the Virgo gE NGC 4472 (M49), and ages and metallicities for 131 GCs. We confirm our earlier finding that the metal-poor GCs have a significantly higher velocity dispersion than the metal-rich GCs, and we find little or no rotation in the metal-rich GCs. The velocity dispersion profile is consistent with isotropic GC orbits and the mass distribution inferred from X-ray data. Our sample of GCs spans a metallicity range of −1.6 ≤ [Fe/H] ≤ 0 dex. The metal-poor and metal-rich GCs are coeval within the errors, and all GCs older than 6 Gyr at 95% confidence.

Type
Part XII: Poster Papers
Information
Symposium - International Astronomical Union , Volume 201: New Cosmological Data and the Values of the Fundamental Parameters , 2005 , pp. 441 - 442
Copyright
Copyright © Astronomical Society of the Pacific 2005 

References

Beasley, M. et al. 2000, MNRAS, in press.Google Scholar
Geisler, D., Lee, M. G. & Kim, E. 1996, AJ, 111, 1529.Google Scholar
Irwin, J. A. & Sarazin, C. L. 1996, ApJ, 471, 683.Google Scholar
Sharpies, R. M. et al. 1998, AJ, 115, 2337.Google Scholar
Worthey, G. 1994, ApJS, 95, 107.Google Scholar
Zepf, S. E. et al. 2000, AJ, in press.Google Scholar