File:Central region of HST image of NGC 3921 (opo9734v).jpg
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Central_region_of_HST_image_of_NGC_3921_(opo9734v).jpg (400 × 352 pixels, file size: 28 KB, MIME type: image/jpeg)
Captions
Captions
In NGC 3921, we have discovered over 100 new young clusters. There are two reasons to believe that all these young clusters formed from GMCs in the merging spiral galaxies.
Summary
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| Description |
English: In NGC 3921, we have discovered over 100 new young clusters. There are two reasons to believe that all these young clusters formed from GMCs in the merging spiral galaxies. First, in all three galaxies (N4038/39, N7252, N3921) the young clusters show same, characteristic luminosity distribution: For every very luminous cluster, there are 10 times as many clusters that are 3 times fainter, and 100 times as many clusters that are 10 times fainter. This characteristic distribution is very similar to that of GMCs in nearby galaxies, where for every very massive GMC there are 10 GMCs one-third as massive and about 100 GMCs one-tenth as massive. Also, GMCs contain about 100,000 times to about 10 million times as much mass as our sun, a range of masses nearly identical to that of globular star clusters. Second, our observations of the two more advanced merger galaxies with Hubble show that the newly-borne clusters in them have the same spatial distribution as the stars. (Explain violent relaxation, why GMCs would experience same fluctuating gravitational field during the mergers as the stars do, and thus end up with same spatial distribution; etc) |
| Date | 21 October 1997 (upload date) |
| Source | Central region of HST image of NGC 3921 |
| Author | B. Whitmore (STScI) |
Licensing
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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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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 19:47, 2 August 2024 | | 400 × 352 (28 KB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://esahubble.org/media/archives/images/original/opo9734v.jpg via Commons:Spacemedia |
| 19:47, 2 August 2024 |  | 400 × 352 (33 KB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://cdn.esahubble.org/archives/images/large/opo9734v.jpg via Commons:Spacemedia |
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