scholarly journals Hubble Space Telescope Proper Motions and Stellar Dynamics in the Core of the Globular Cluster 47 Tucanae

2006 ◽  
Vol 166 (1) ◽  
pp. 249-297 ◽  
Author(s):  
Dean E. McLaughlin ◽  
Jay Anderson ◽  
Georges Meylan ◽  
Karl Gebhardt ◽  
Carlton Pryor ◽  
...  
Keyword(s):  
Globular Cluster ◽  
Hubble Space Telescope ◽  
Stellar Dynamics ◽  
Proper Motions ◽  
Space Telescope ◽  
The Core

scholarly journals Extreme Globular Cluster Systems

2005 ◽  
Vol 13 ◽  
pp. 171-172
Author(s):  
John P. Blakeslee
Keyword(s):  
Globular Cluster ◽  
Hubble Space Telescope ◽  
Large Format ◽  
Cluster Systems ◽  
Space Telescope ◽  
The Core ◽  
Early Results ◽  
Advanced Camera For Surveys

AbstractThe superior resolution and large format of the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope (HST) make it a powerful new tool in the study of extra-galactic globular cluster (GC) systems. We summarize some early results on GC populations from the ACS GTO program, concentrating on the extreme cases of the isolated dwarf NGC 2915 and the core of the massive lensing cluster Abell 1689.

Globular cluster photometry with the Hubble Space Telescope. I - Description of the method and analysis of the core of 47 TUC

1992 ◽  
Vol 104 ◽  
pp. 1790 ◽  
Author(s):  
Puragra Guhathakurta ◽  
Brian Yanny ◽  
Donald P. Schneider ◽  
John N. Bahcall
Keyword(s):  
Globular Cluster ◽  
Hubble Space Telescope ◽  
Space Telescope ◽  
The Core

scholarly journals Globular cluster photometry with the Hubble Space Telescope. 2: U, V, and I measurements of M15

1994 ◽  
Vol 107 ◽  
pp. 1745 ◽  
Author(s):  
Brian Yanny ◽  
Puragra Guhathakurta ◽  
John N. Bahcall ◽  
Donald P. Schneider
Keyword(s):  
Globular Cluster ◽  
Hubble Space Telescope ◽  
Space Telescope

scholarly journals Measuring proper motions of galactic dwarf galaxies with Hubble Space Telescope

2007 ◽  
Vol 3 (S248) ◽  
pp. 244-247 ◽  
Author(s):  
S. Piatek ◽  
C. Pryor
Keyword(s):  
Research Group ◽  
Dwarf Galaxies ◽  
Hubble Space Telescope ◽  
Proper Motions ◽  
Future Directions ◽  
Space Telescope ◽  
The Past ◽  
Scientific Justification ◽  
Satellite Galaxies ◽  
Using Data

AbstractOver the past several years, our research group has been measuring proper motions for nearby dwarf satellite galaxies using data taken with the Hubble Space Telescope. In order to measure proper motions with an expected size of several tens of milliarcseconds per century using a time baseline of 2-4 years, our work required that positions of stars and QSOs be measured to an accuracy of ~0.25 mas (~0.005 pixel). This contribution reviews the scientific justification of this work and our methodology. It concludes with a few general results and future directions.

scholarly journals The HST large programme on NGC 6752 – III. Detection of the peak of the white dwarf luminosity function

2019 ◽  
Vol 488 (3) ◽  
pp. 3857-3865
Author(s):  
L R Bedin ◽  
M Salaris ◽  
J Anderson ◽  
M Libralato ◽  
D Apai ◽  
...  
Keyword(s):  
Globular Cluster ◽  
White Dwarf ◽  
Luminosity Function ◽  
Main Sequence ◽  
Hubble Space Telescope ◽  
Horizontal Branch ◽  
Space Telescope

ABSTRACT We report on the white dwarf (WD) cooling sequence of the old globular cluster NGC 6752, which is chemically complex and hosts a blue horizontal branch. This is one of the last globular cluster WD cooling sequences accessible to imaging by the Hubble Space Telescope. Our photometry and completeness tests show that we have reached the peak of the luminosity function of the WD cooling sequence, at a magnitude mF606W  = 29.4 ± 0.1, which is consistent with a formal age of ∼14 Gyr. This age is also consistent with the age from fits to the main-sequence turn-off (13–14 Gyr), reinforcing our conclusion that we observe the expected accumulation of WDs along the cooling sequence.

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