Merging galaxies in the distant Universe through a gravitational magnifying glass

The Atacama Large Millimeter/submillimeter Array (ALMA) and many other telescopes on the ground and in space have been used to obtain the best view yet of a collision that took place between two galaxies when the Universe was only half its current age. The astronomers enlisted the help of a galaxy-sized magnifying glass to reveal otherwise invisible detail. These new studies of the galaxy H-ATLAS J142935.3-002836 have shown that this complex and distant object looks like the well-known local galaxy collision, the Antennae Galaxies.

In this picture you can see the foreground galaxy that is doing the lensing, which resembles how our home galaxy, the Milky Way, would appear if seen edge-on. But around this galaxy there is an almost complete ring — the smeared out image of a star-forming galaxy merger far beyond.

This picture combines the views from the NASA/ESA Hubble Space Telescope and the Keck-II telescope on Hawaii (using adaptive optics) along with the ALMA images shown in red. The ALMA data also give information about the motions of the material in the distant merging galaxies and were vital in unravelling the complex object.


ALMA (ESO/NAOJ/NRAO)/NASA/ESA/W. M. Keck Observatory

À propos de l'image

Date de publication:26 août 2014 18:00
Communiqués de presse en rapport:eso1426
Taille:612 x 612 px

À propos de l'objet

Nom:H-ATLAS J142935.3-002836
Type:Early Universe : Galaxy : Type : Interacting

Image Formats

Grand JPEG
58,4 Kio


Position (RA):14 29 34.79
Position (Dec):0° 28' 33.97"
Field of view:0.11 x 0.11 arcminutes
Orientation:North is 10.6° left of vertical

Couleurs & filtres

Hubble Space Telescope
W. M. Keck Observatory
W. M. Keck Observatory
MillimétriqueAtacama Large Millimeter/submillimeter Array