[HN Gopher] High Contrast Imaging of the Exoplanet HIP 65426 b f... ___________________________________________________________________ High Contrast Imaging of the Exoplanet HIP 65426 b from 2-16 mm Author : bookofjoe Score : 40 points Date : 2022-09-01 19:02 UTC (3 hours ago) (HTM) web link (arxiv.org) (TXT) w3m dump (arxiv.org) | bookofjoe wrote: | From the submission page: | | >Comments: 35 pages, 16 figures, 3 tables, 1 wonderful telescope; | Submitted to AAS Journals | nostromo wrote: | Direct link to the image: https://go.nature.com/3q56P5U | aaaaaaaaaaab wrote: | The white star is the exoplanet? | LeifCarrotson wrote: | No, the white star is the measured location of the system's | star, which has been subtracted from the image. The yellow- | orange blob of ~16 pixels below and to the left of the star | is the super-Jovian expolanet. There are more images in the | source paper with different spectral filters, the caption on | figure 8 describes the star: | | https://i.imgur.com/KlgEVze.png | | Take a look at this sequence: | | https://i.imgur.com/STcNkIP.png | | They started with the image at left, which represents a | combination of both the planet and the star. Clearly, the | star is so much brighter than the reflection of starlight off | the planet that it blows out the whole image. But the star is | pretty consistent, and definitely circular, so they could | take a reference image and a rotated image and erase all the | pixels that look like they expect the star to look. The | difference between a normal star and the image they actually | took is the planet-shaped hole left after subtracting one | from the other. | lxe wrote: | Thanks for the explanation! That is very interesting to see | how they pick out the planets out of the star's brightness. | klyrs wrote: | More pictures in the linked paper; the captions mention that | the position of the star is marked by the white star. | jrumbut wrote: | I only briefly examined the paper, but I felt that it did a | better than usual job explaining how they got to that | image. ___________________________________________________________________ (page generated 2022-09-01 23:00 UTC)