B The ONE Ring has been Found

[jedishrfu]

TL;DR

a perfect Einstein Ring has been found by Euclid

https://unionrayo.com/en/100-euclid-discovers-einstein-ring/

 

[Drakkith]

And it even has an eye of sauron in the middle of it!

 

[robphy]

https://www.newscientist.com/article/2467413-stunning-image-shows-the-closest-ever-einstein-ring/
"Stunning image shows the closest ever Einstein ring" by Alex Wilkins

https://en.wikipedia.org/wiki/NGC_6505

The lens was discovered by Euclid Archive Scientist Bruno Altieri in data from ESA's Euclid telescope. The researchers therefore suggest the nickname "Altieri's lens".

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https://www.euclid-ec.org/einstein-ring-in-ngc-6505/
https://www.esa.int/Science_Explora...lid/Euclid_discovers_a_stunning_Einstein_ring

"Euclid: A complete Einstein ring in NGC 6505"
(This paper is published on behalf of the Euclid Consortium.)
C. M. O’Riordan, L. J. Oldham, . . . , M. Jauzac and H. Dannerbauer
Astronomy&Astrophysics, Volume 694, February 2025
A145, 13 pages
https://doi.org/10.1051/0004-6361/202453014
10 February 2025

https://www.aanda.org/articles/aa/full_html/2025/02/aa53014-24/aa53014-24.html

We report the discovery of a complete Einstein ring around the elliptical galaxy NGC 6505, at z = 0.042. This is the first strong gravitational lens discovered in Euclid and the first in an NGC object from any survey. The combination of the low redshift of the lens galaxy, the brightness of the source galaxy ($I_E = 18.1$ lensed, $I_E = 21.3$ unlensed), and the completeness of the ring make this an exceptionally rare strong lens, unidentified until its observation by Euclid. We present deep imaging data of the lens from the Euclid Visible Camera (VIS) and Near-Infrared Spectrometer and Photometer (NISP) instruments, as well as resolved spectroscopy from the Keck Cosmic Web Imager (KCWI). . . .
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