File:Noao-n5474block.jpg
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[edit]DescriptionNoao-n5474block.jpg |
English: NGC 5474 is an asymmetric spiral galaxy and it is being dramatically disturbed by its much larger neighbor M101. With respect to this image, M101 is several fields away towards the upper left direction. At first glance, it might appear that M101 is somehow gravitationally dragging the nucleus right out of NGC 5474. However, astronomers that model these kinds of galactic interactions on a computer find a slightly different story. When using tens (if not hundreds) of thousands of point masses for stars, astronomers found that the asymmetry displayed in NGC 5474 is probably relatively short lived. We just happen to be looking at this galaxy in a state of "sloshed" agitation. As NGC 5474 orbits M101, the amount of asymmetry depends of the relationship between the direction of orbital revolution about M101 and the sense of rotation for NGC 5474ʼs disk. If the revolution is opposite that of disk rotation, as it is in the case of NGC 5474, then the lopsided state can survive for many galactic rotations after an initial (strong) tidal perturbation.Note that the seemingly grainy appearance of this galaxy is due to partially resolving some ofthe brighter stars in the disk. A healthy sprinkling of pink star forming regions, and blue (young) stellar associations can also be seen along the spiral structure of the galaxy. This image was taken as part of Advanced Observing Program (AOP) program at Kitt Peak Visitor Center during 2014. |
Date | |
Source | https://noirlab.edu/public/images/noao-n5474block/ |
Author | KPNO/NOIRLab/NSF/AURA/Adam Block |
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[edit]This media was created by the National Optical-Infrared Astronomy Research Laboratory (NOIRLab).
Their website states: "Unless specifically noted, the images, videos, and music distributed on the public NOIRLab website, along with the texts of press releases, announcements, images of the week and captions; are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. | |
This file is licensed under the Creative Commons Attribution 4.0 International license.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 13:05, 23 June 2023 | 1,945 × 1,287 (555 KB) | C messier (talk | contribs) | Uploaded a work by KPNO/NOIRLab/NSF/AURA/Adam Block from https://noirlab.edu/public/images/noao-n5474block/ with UploadWizard |
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Credit/Provider | KPNO/NOIRLab/NSF/AURA/Adam Block |
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Source | NSF's NOIRLab |
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Date and time of data generation | 11:42, 10 April 2014 |
JPEG file comment | Processed with MaxIm DL |
Software used | Adobe Photoshop CS Windows |
File change date and time | 20:15, 30 August 2021 |
Date and time of digitizing | 12:17, 13 May 2004 |
Date metadata was last modified | 22:15, 30 August 2021 |
Unique ID of original document | adobe:docid:photoshop:4b51014b-a54c-11d8-b7e3-f68802e4ff0e |
Keywords | NGC 5474 |
Contact information |
950 North Cherry Ave. Tucson, AZ, 85719 USA |
IIM version | 4 |
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