Mr.Trunk · @mrtrunk
7 followers · 12433 posts · Server dromedary.seedoubleyou.me
Jim Donegan ✅ · @jimdonegan
1553 followers · 4634 posts · Server mastodon.scot
Fraser Cain · @fraser
2883 followers · 773 posts · Server m.universetoday.com

Astronomers Find a Rare "Einstein Cross"

Astronomers use powerful gravitational lenses to peer farther into the Universe than they could with their telescopes alone. A foreground galaxy acts as a natural lens for a more distant galaxy, magnifying it and often splitting its light into several versions. When the alignment is almost perfect, the light is split four ways into an "Einstein Cross." Only a few of these have ever been discovered, and now astronomers have found a new one using the Dark Energy Spectroscopic Instrument. It's both beautiful and scientifically valuable for studying the distant Universe.

arxiv.org/abs/2307.12470

#desi #gravitationallens #einsteincross

Last updated 1 year ago

Ansgar Schmidt :verified: · @Ansi
493 followers · 1476 posts · Server mastodon.cloud
Daniel Fischer · @cosmos4u
1273 followers · 2043 posts · Server scicomm.xyz

Abell 1201 - Detection of an Ultramassive in a Strong (with roughly 10 to 50 billion solar masses) with : arxiv.org/abs/2303.15514 -> Light-bending gravity reveals one of the biggest black holes ever found: durham.ac.uk/news-events/lates

#hubble #gravitationallens #blackhole

Last updated 1 year ago

Michaela Maya · @mimrma
1374 followers · 1471 posts · Server mastodon.wurzelmann.at

Heute hab ich ein Phänomen namens "gravitational lensing" kennengelernt and it still blows my mind: esa.int/ESA_Multimedia/Images/

#gravitationallens #astro #astronomie #jameswebb #hubble

Last updated 1 year ago

Jim Donegan ✅ · @jimdonegan
1396 followers · 3865 posts · Server mastodon.scot
Louis Marmet · @redshiftdrift
51 followers · 164 posts · Server astrodon.social

@tomassetti Helbig uses an to find the transverse velocity of the , but the ring is the image of the entire high-z object. One cannot obtain an accurate redshift for a part of the ring.

Multiple-images are better as in the paper by Wang et al.
🔗 doi.org/10.3847/1538-4357/ac98
(cited by Helbig) which gives a better description of the measurement.

@GravityGrinch any comment on the simple gravitational lens models used in these papers? Can this work?

#einsteinring #gravitationallens #redshiftdrift

Last updated 2 years ago

Ansgar Schmidt :verified: · @Ansi
370 followers · 1128 posts · Server mastodon.cloud
Khurram Wadee ✅ · @mkwadee
1034 followers · 10917 posts · Server mastodon.org.uk
· @NetMassimo
93 followers · 1646 posts · Server mastodon.social

An article published in the journal "Nature Astronomy" reports a study on a whose glow was distorted and multiplied by a gravitational lens.
english.tachyonbeam.com/2021/0

#astronomy #gravitationallens #hubble #supernova

Last updated 3 years ago

· @NetMassimo
93 followers · 1646 posts · Server mastodon.social

An article published in "The Astrophysical Journal" reports a study on a double X-ray source in the early universe cataloged as MG B2016+112 which could be composed of two supermassive black holes whose image is distorted by a gravitational lens.
english.tachyonbeam.com/2021/0

#astronomy #blackholes #gravitationallens #agn

Last updated 3 years ago

Khurram Wadee ✅ · @mkwadee
1034 followers · 10918 posts · Server mastodon.org.uk
Khurram Wadee ✅ · @mkwadee
986 followers · 10873 posts · Server mastodon.org.uk