Montage of the SDP.81 Einstein Ring and the lensed galaxy (no annotations)

ALMA’s Long Baseline Campaign has produced a spectacularly detailed image of a distant galaxy being gravitationally lensed, revealing star-forming regions — something that has never seen before at this level of detail in a galaxy so remote. The new observations are far more detailed than any previously made of such a distant galaxy, including those made using the NASA/ESA Hubble Space Telescope, and reveal clumps of star formation in the galaxy equivalent to giant versions of the Orion Nebula.

The left panel shows the foreground lensing galaxy (observed with Hubble), and the gravitationally lensed galaxy SDP.81, which forms an almost perfect Einstein Ring, is hardly visible.

The middle image shows the sharp ALMA image of the Einstein ring, with the foreground lensing galaxy being invisible to ALMA. The resulting reconstructed image of the distant galaxy (right) using sophisticated models of the magnifying gravitational lens, reveal fine structures within the ring that have never been seen before: Several dust clouds within the galaxy, which are thought to be giant cold molecular clouds, the birthplaces of stars and planets.


ALMA (NRAO/ESO/NAOJ)/Y. Tamura (The University of Tokyo)/Mark Swinbank (Durham University)

O zdjęciu

Data publikacji:8 czerwca 2015 20:00
Powiązane komunikaty:eso1522
Rozmiar:2537 x 928 px

O obiekcie

Nazwa:Einstein Ring, SDP 81
Typ:Early Universe : Galaxy : Type : Gravitationally Lensed
Early Universe : Cosmology : Phenomenon : Lensing
Odległość:z=3.04 (redshift)

Formaty zdjęć

Wielki JPEG
494,3 KB

Kolory i filtry

MilimetrowyAtacama Large Millimeter/submillimeter Array


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