Hubble image archive
Stellar Sorting in Globular Cluster 47 Tucanae
NASA's Hubble Space Telescope has provided astronomers with the best observational evidence to date that globular clusters sort out stars according to their mass, governed by a gravitational billiard ball game between stars. Heavier stars slow down and sink to the cluster's core,...
- Date
- Jan 1, 2006
- Mission
- Hubble Space Telescope
- Archive ID
- hubblesite-images-2006-33-1951-image
NASA's Hubble Space Telescope has provided astronomers with the best observational evidence to date that globular clusters sort out stars according to their mass, governed by a gravitational billiard ball game between stars. Heavier stars slow down and sink to the cluster's core, while lighter stars pick up speed and move across the cluster to its periphery.
[Left] - A photo of the globular star cluster 47 Tucanae taken with the Very Large Telescope in Chile. It is one of the densest globular clusters in the Southern Hemisphere. The cluster contains 1 million stars.
[Right] - A NASA Hubble Space Telescope color photo of the core of 47 Tucanae. Multiple photos of this region allowed astronomers to track the "behive swarm" motion of stars. Precise velocities were obtained for nearly 15,000 stars in this cluster. This image was taken with Hubble's Advanced Camera for Surveys.
The international science team was made of the following scientists: D.E. McLaughlin (University of Leicester), J. Anderson (Rice University), G. Meylan (Ecole Polytechnique Federale de Lausanne), K. Gebhardt (University of Texas at Austin), C. Pryor (Rutgers University), D. Minniti (Pontifica Universidad Catolica), and S. Phinney (Caltech).
Credits
Ground-Based Image: Very Large Telescope/European Southern Observatory, R. Kotak and H. Boffin (ESO);Hubble Image: NASA, ESA and G. Meylan (Ecole Polytechnique Federale de Lausanne
Image Details
| About The Object | |
|---|---|
| Object Name | 47 Tucanae, NGC 104 |
| Object Description | Globular Cluster |
| R.A. Position | 00h 24m 5.67s |
| Dec. Position | -72° 4' 52.59" |
| Constellation | Tucana |
| Distance | This obejct is roughly 15,000 light-years (4,600 parsecs) away. |
| Dimensions | 1 arcminute (4.6 light-years or 1.4 parsecs) wide (right) |
| About The Data | |
| Data Description | The Hubble image was created from data from the following proposals: , , and : G. Meylan (Ecole Polytechnique Federale de Lausanne), D. Minniti (Universidad Catolica de Chile), S. Phinney (California Institute of Technology), C. Pryor (Rutgers University), B. Sams (Mediateam, Germany), and C. Tinney (Anglo-Australian Observatory) : R. Gilliland (STScI), D. Naef (Observatoire de Geneve), A. Sarajedini (University of Florida), S. Sigurdsson (Pennsylvania State University), D. VandenBerg (University of Victoria), T. Brown (University Corporation For Atmospheric Research), A. Burrows (University of Arizona), W. Cochran (University of Texas, Austin), P. Edmonds (Harvard University), S. Frandsen (Aarhus University), S. Vogt, P. GuhaThakurta, and D. Lin (University of California, Santa Cruz), G. Marcy (University of California, Berkeley), M. Mayor (Observatoire de Geneve), and E. Milone (University of Calgary) : R. Bohlin (STScI), G. De Marchi (ESA/STScI), and R. Gilliland (STScI) : R. Gilliland, K. Sahu, and P. Goudfrooij (STScI) : G. Meurer and H. Tran (Johns Hopkins University) : I. King (University of Washington) and J. Anderson (Rice University) The international team was made of the following scientists: D.E. McLaughlin (University of Leicester), J. Anderson (Rice University), G. Meylan (Ecole Polytechnique Federale de Lausanne), K. Gebhardt (University of Texas, Austin), C. Pryor (Rutgers University), D. Minniti (Pontifica Universidad Catolica), and S. Phinney (Caltech). |
| Instrument | ESO>VLT (left); HST>WFPC2, HST>ACS/WFC, and HST>ACS/HRC (right) |
| Exposure Dates | October 1995, November 1997, July 1999, October 1999, July 2001, April 2002, and July 2002 (right) |
| Filters | Hubble data: F300W (Wide U), F336W (U), F475W (SDSS g) For image: F475W (SDSS g), F555W (V), and F814W (I) |
| About The Image | |
| Color Info | The Hubble image is a composite of many separate exposures made by the ACS instrument on the Hubble Space Telescope using three different filters to sample broad wavelength ranges. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are: Blue: F475W (SDSS g) Green: F555W (V) Red: F814W (I) |
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Source
Image and source material are credited to the official mission archive linked below.
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