Can Einstein-Chwolson rings be observed from a telescope on Earth?

[KurtLudwig]

TL;DR

Can Einstein-Chwolson rings be observed from a telescope on Earth or can they only be observed by the Hubbell telescope in space?

There may be too much absorption and distortion by the atmosphere of the faint images when viewed from Earth.

 

[berkeman]

It looks like radio telescopes on Earth can image them okay:

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

 

[glappkaeft]

Yes, the first one was discovered by VLA
https://www.nrao.edu/pr/2000/vla20/background/ering/

 

[glappkaeft]

If you a re thinking of optical telescope that can also be done.
http://www.ctio.noao.edu/noao/content/new-einstein-ring-discovered

 

[KurtLudwig]

Thanks for the link. I have read the article of the above link, and the observation of doctoral researcher Margharita Bettinelli.

Are radio telescopes more sensitive than optical telescopes since microwaves are less absorbed by clouds and water vapor in the air?

It must take a very high-powered reflective telescope to to see a source galaxy 8.5 billion light years from Earth. And it must be located on a mountain top in Chile where there is very little light pollution and water vapor in the atmosphere.

 

[Tom.G]

It must take a very high-powered reflective telescope...

Yup, if you consider a 'gain' factor 250 000 to 1 000 000 to be 'very high-powered.'

Depending on the individual, the pupil size when dark adapted is 4mm to 8mm.
(reference: https://www.ncbi.nlm.nih.gov/books/NBK381/)
If you calculate the light gathering area of the human pupil and the 4meter telescope, that's the ratio you get.

Just another tool that we 'Humans-the-tool-makers' have come up with.

Cheers,
Tom