Can someone explain the diagonal line and halo?

by nyjtm

Especially viewed in DECaLS browser, there is an ovate halo surrounding the galaxy and a diagonal line through it with its ends touching opposite ends of the halo. Doesn't look to me like an artifact, but... Any ideas?

Posted February 14, 2016 7:59 PM

by Ghost_Sheep_SWR

Weird center anyway, half covered and green on the other side

enter image description here

Posted February 14, 2016 8:31 PM

by Budgieye moderator

I think it looks like a #shell galaxy, formed by high speed collisions

See index

2.9 Galaxy collisions and shell galaxies created by high speed collisions http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=2&comment_id=53d8b8790d43f77bb6000f8a

enter image description here

Posted February 14, 2016 8:51 PM