NGC 6505

NGC 6505 is an elliptical galaxy with Hubble sequence classification E/S0 in the northern celestial hemisphere constellation Draco.

[4] In 2025, the Euclid Space Telescope found a complete Einstein ring surrounding NGC 6505.

[5] With the help of the lens model some properties of the central region of NGC 6505 were estimated.

One result is that the central region has an initial mass function that is heavier than predicted with Chabrier and a dark matter fraction of 11.1+5.4−3.5 % inside the Einstein radius.

The lens was also observed with resolved spectroscopy of the Keck Cosmic Web Imager (KCWI) and the Dark Energy Spectroscopic Instrument (DESI).

NGC6505 in the discovery paper with an alternative color pattern. [ 3 ]
Euclid VIS instrument image of the Einstein ring. The VIS instrument has a higher resolution than NISP (This image was supersampled, achieving a resolution twice as high as the Euclid VIS data..). [ 3 ]