File:WD 0727+482 binary.gif
WD_0727+482_binary.gif (430 × 405 pixels, file size: 198 KB, MIME type: image/gif, looped, 5 frames, 1.0 s)
Captions
Summary[edit]
DescriptionWD 0727+482 binary.gif |
English: Strand, Dahn & Liebert first reported the binary nature of this system in 1976. Harrington, Christy & Strand 1981 described this binary more in detail. G107-70 (aka WD 0727+482) forms with G107-69 a nearby quadruple system (ca. 11.3 parsec/36.8 light years in Gaia DR3).
In 1999 Bond et al. published their Hubble WFPC2 based orbital period of 19.25 years for G107-70. The animation here is based on their observations. Dates: 1997-09-28, 1998-03-23, 1998-10-18, 1999-04-03, 1999-10-01 First I aligned the images according to background stars. I assumed an equal mass binary due to the similar brightness of both white dwarfs and used a barycenter in the middle between the white dwarfs. I then moved the images to align the barycenter, canceling any proper motion or parallax effect. Image Credit: NASA/ESA Hubble Space Telescope WFPC2 |
Date | |
Source | Own work |
Author | Meli thev |
Licensing[edit]
- 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 | 19:58, 24 April 2023 | 430 × 405 (198 KB) | Meli thev (talk | contribs) | Uploaded own work 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 ta.wikipedia.org
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Software used | Adobe Photoshop Elements 12.0 Windows |
---|