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Hubble Space Telescope Studies of the Dense Central Regions of Globular Clusters

Published online by Cambridge University Press:  25 May 2016

Puragra Guhathakurta ,
Brian Yanny ,
Donald P. Schneider  and
John N. Bahcall
Puragra Guhathakurta
Affiliation:
Univ. of California, Lick Obs., Santa Cruz, CA 95064, USA
Brian Yanny
Affiliation:
Fermi National Accelerator Lab., Batavia, IL 60510, USA
Donald P. Schneider
Affiliation:
Dept. of Astronomy & Astrophysics, Pennsylvania State Univ., University Park, PA 16802, USA
John N. Bahcall
Affiliation:
Inst. for Advanced Study, Princeton, NJ 08540, USA

Abstract

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We present results from an ongoing program to probe the dense central parts of Galactic globular clusters using multicolor Hubble Space Telescope images (WF/PC-I and WFPC2). Our sample includes the dense clusters M15, 47 Tuc, M30, NGC 6624, M3 and M13. The two main goals of our program are to measure the shape of stellar density profile in clusters (the slope of the density cusp in post core collapse clusters, in particular) and to understand the nature of evolved stellar populations in very dense regions and their variation as a function of radius. The latter includes studies of blue straggler stars and of the central depletion of bright red giants. Our recent WFPC2 study of M15 is described in detail.

Type
New Observations with HST
Information
Symposium - International Astronomical Union , Volume 174: Dynamical Evolution of Stars Clusters , 1996 , pp. 19 - 28
Copyright
Copyright © Kluwer 1996 

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