File:Core of Globular Cluster 47 Tucanae (1991-12-45).tif
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Captions
Captions
The core of the globular cluster 47 Tucanae, as imaged by the European Space Agency's Faint Object Camera (FOC) onboard NASA's Hubble Space Telescope.
Summary[edit]
| Description |
English: The core of the globular cluster 47 Tucanae, as imaged by the European Space Agency's Faint Object Camera (FOC) onboard NASA's Hubble Space Telescope. Space Telescope's high spatial resolution and ultraviolet sensitivity make it a powerful tool for probing the centers of globular clusters. The FOC resolves several hundred stars where ground-based images only yield a few dozen stars. At least 21 of these stars are exceptionally bright in ultraviolet light. HST's UV sensitivity and high resolution allow it to easily separate these so-called blue stragglers stars from the red giant stars which dominate the cluster. Blue stragglers may evolve from "old age" back to a hotter and brighter youth through stellar collisions and mergers. This high concentration of blue stragglers towards the core of 47 Tucanae suggests they are significantly more massive than most of the cluster's stars. Some of blue stragglers could be massive because they are really double star systems. Such binary systems may influence the motions of thousands of other stars within the cluster. The FOC observations were made in ultraviolet light (2200 angstroms) on November 16, 1990 with the FOC in F/96 mode. Field of view is 11 X 11 arc seconds corresponding to a width of .75 light years, at 47 Tucanae's distance of 15,000 light years. |
| Date | 24 July 1991 (upload date) |
| Source | Core of Globular Cluster 47 Tucanae |
| Author | Investigators: Francesco Paresce (ESA/STScI). Michael Shara (STScI), Georges Meylan (ESA/STScI) Credit: NASA/ESA |
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Licensing[edit]
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This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use. The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or 2008 copyright statement at spacetelescope.org. For material created by the European Space Agency on the spacetelescope.org site since 2009, use the {{ESA-Hubble}} tag. |
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| current | 00:35, 29 October 2023 |  | 3,289 × 2,305 (15.05 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://stsci-opo.org/STScI-01EVTB8FT0X538CD4YBSP89QJV.tif via Commons:Spacemedia |
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