We report tentative evidence for a cold stellar stream in the ultra-diffuse galaxy NGC1052-DF2. If confirmed, this stream (which we refer to as "The Maybe Stream") would be the first cold stellar stream detected outside of the Local Group. The candidate stream is very narrow and has an unusual and highly curved shape.
@article{arxiv.1805.00017,
title = {The Maybe Stream: A Possible Cold Stellar Stream in the Ultra-Diffuse Galaxy NGC1052-DF2},
author = {Roberto Abraham and Shany Danieli and Pieter van Dokkum and Charlie Conroy and J. M. Diederik Kruijssen and Yotam Cohen and Allison Merritt and Jielai Zhang and Deborah Lokhorst and Lamiya Mowla and Jean Brodie and Aaron J. Romanowsky and Steven Janssens},
journal= {arXiv preprint arXiv:1805.00017},
year = {2018}
}