Gravitational lens SDP81

14 April, 2016 / Read time: 1 minute

The analysis of the Atacama Large Millimeter/submillimeter Array (ALMA) observations of SDP.81, a gravitational lens, reveals an intriguing object in the halo of the foreground lensing galaxy that is possibly a dwarf dark galaxy.

Credit: Y. Hezaveh, Stanford Univ.; ALMA (NRAO/ESO/NAOJ); NASA/ESA Hubble Space Telescope