Starship Asterisk*

johnnydeep wrote: ↑Thu Jan 19, 2023 9:08 pm

Francesca wrote: ↑Thu Jan 19, 2023 8:53 pm I see in the picture (also in that by Hubble) two identical images of a galaxy. My question is whether this has been already noted. To see the first one, look at the star at the left of the center of the picture. It has six blue rays. Prolong the ray pointing up-right till a small red galaxy. The second image is approximately on the vertical line at the middle of the picture, just at the end of the left blue ray of another star, a bit less brilliant than that considered above.
There are two more objects that seem to be distorted mirror images one of the other.

I'm not sure I'm following your directions correctly. Can you post a pic with the two galaxies indicated? This are the two galaxies that I think you are referring to:


two red galaxies in jwst gravitational lensing pic.png


[ EDIT: nah, that can't be right. I give up. I need a pic! ]

Chris Peterson wrote: ↑Thu Jan 19, 2023 9:33 pm

Francesca wrote: ↑Thu Jan 19, 2023 8:53 pm I see in the picture (also in that by Hubble) two identical images of a galaxy. My question is whether this has been already noted. To see the first one, look at the star at the left of the center of the picture. It has six blue rays. Prolong the ray pointing up-right till a small red galaxy. The second image is approximately on the vertical line at the middle of the picture, just at the end of the left blue ray of another star, a bit less brilliant than that considered above.
There are two more objects that seem to be distorted mirror images one of the other.

Interesting catch. While the two objects appear very similar- really, too much for a coincidence IMO (and not mirrored)- I don't think they can be lensed images. You'd never have a pair of lensed images that look the same, given the nature of gravitational lensing distortion. Some kind of processing and stacking anomaly, maybe?
_
2gal.jpg

Francesca wrote: ↑Fri Jan 20, 2023 8:28 pm The double images of galaxies are known. See this (indicated to me by Dan Coe)

https://arxiv.org/abs/2211.13334

johnnydeep wrote: ↑Fri Jan 20, 2023 8:50 pm

Francesca wrote: ↑Fri Jan 20, 2023 8:28 pm The double images of galaxies are known. See this (indicated to me by Dan Coe)

https://arxiv.org/abs/2211.13334

Isn't that article about lensed stars, not galaxies? The title is "Two lensed star candidates at z≃4.8 behind the galaxy cluster MACS J0647.7+7015"

Unless the double galaxies we've been discussing are also mentioned within. I admit I haven't read the article in detail.

Chris Peterson wrote: ↑Fri Jan 20, 2023 8:54 pm

johnnydeep wrote: ↑Fri Jan 20, 2023 8:50 pm

Francesca wrote: ↑Fri Jan 20, 2023 8:28 pm The double images of galaxies are known. See this (indicated to me by Dan Coe)

https://arxiv.org/abs/2211.13334

Isn't that article about lensed stars, not galaxies? The title is "Two lensed star candidates at z≃4.8 behind the galaxy cluster MACS J0647.7+7015"

Unless the double galaxies we've been discussing are also mentioned within. I admit I haven't read the article in detail.

Yes, but note identified object 1 from the HST images (1.1, 1.2, and 1.3).