Einstein Ring GAL-CLUS-022058-38303 by HST (Leo Shatz)

Einstein Ring GAL-CLUS-022058-38303 by HST

Updated 15 Dec 2020: this image precedes a recent publication with acknowledgment to me Rings of Relativity - Hubble Picture of the Week on 14 December 2020

A rare object in space: Einstein Ring GAL-CLUS-022058-38303 imaged by Hubble Space Telescope and buried in HLA archive for few years. Colorized image based on single filter channel (IR F160W).

An Einstein ring, also known as an Einstein–Chwolson ring or Chwolson ring, is created when light from a galaxy or star passes by a massive object on route to the Earth. Due to gravitational lensing, the light is diverted, making it seem to come from different places. If source, lens, and observer are all aligned, the light appears as a ring.

GAL-CLUS-022058-38303 is the largest, nearly-complete Einstein ring known. The ring has an extreme diameter, approximately 20 arcseconds, and is the result of gravitational lensing by a massive cluster elliptical galaxy. This spectacular system shows two source galaxies (perhaps interacting), resulting in double arcs with striking differences in color. The image unveils detailed structure in the ring arcs (which exhibit a complex structure), allowing for the identification of multiply imaged regions in the source galaxies.

More general information about Einsten Ring:

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

RA=02h 20m 57.68s

DEC=-38d 33m 3.47s

Image credits: ESA/Hubble & NASA, Dr. Saurabh W. Jha

Processing and copyright: Leo Shatz

Description source and credits: HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13756

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Status	Basic failed
Started	...
Astrometry.net job	3374677
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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