WD_0727+482_binary.gif (430 × 405 pixels, file size: 198 KB, MIME type: image/gif, looped, 5 frames, 1.0 s)
Summary
| Description |
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 |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:58, 24 April 2023 | | 430 × 405 (198 KB) | Meli thev | Uploaded own work with UploadWizard |
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