File:BBH-NGC7727.gif
From Wikimedia Commons, the free media repository
Jump to navigation
Jump to search
BBH-NGC7727.gif (500 × 281 pixels, file size: 13.71 MB, MIME type: image/gif, looped, 226 frames, 9.0 s)
File information
Structured data
Captions
Summary[edit]
DescriptionBBH-NGC7727.gif |
English: This animation gives an insight into the method astronomers used to uncover a pair of supermassive black holes lurking 89 million light-years away from Earth in the NGC 7727 galaxy — and to measure their masses. The pair is the closest found to date, both with regards to the distance to Earth and the distance between the two supermassive black holes.
Astronomers studied the spectra of the bright stars around each of the black holes using the MUSE instrument on ESO’s Very Large Telescope (VLT). More massive black holes have a stronger gravitational pull on the stars around them, causing them to move faster. This effect is reflected in the spectra of the stars, with the spectral lines being broader if the stars are moving faster. By measuring the width of the spectral lines for the groups of stars surrounding each black hole in the pair, astronomers calculated the masses to be about 154 million and 6.3 million times that of the Sun. |
Date | |
Source | https://www.youtube.com/watch?v=HnHZY9Py51I |
Author | European Southern Observatory |
Licensing[edit]
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 19:23, 4 December 2021 | 500 × 281 (13.71 MB) | Dabed (talk | contribs) | Uploaded a work by European Southern Observatory from https://www.youtube.com/watch?v=HnHZY9Py51I with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
- Usage on en.wikipedia.org
- Usage on fr.wikipedia.org
- Usage on pl.wikipedia.org
Structured data
Items portrayed in this file
depicts
30 November 2021
image/gif
0afbf0f566a02df95d675ab5886ded84f25fc9f1
14,373,203 byte
9.039999999999983 second
281 pixel
500 pixel
Hidden category: