Planetary Nebula NGC 6778 (IMAGE)

Instituto de Astrofísica de Canarias (IAC)

Planetary Nebula NGC 6778

Caption

This is a false color image of the planetary nebula NGC 6778. In blue, the emission associated with weak lines of ion O++ recombination, taken with the OSIRIS tunable filter blue instrument in the GTC. In green, emission of the same ion in the excited lines by collisions, taken with the narrow filter [O III] of the Nordic Optical Telescope (NOT). The different spatial distribution of both emissions indicating the existence of two different gas components is clearly seen.

Credit

Gran Telescopio CANARIAS (GTC).

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