The Maybe Stream: A Possible Cold Stellar Stream in the Ultra-Diffuse Galaxy NGC1052-DF2
Roberto Abraham, Shany Danieli, Pieter van Dokkum, Charlie Conroy, J., M. Diederik Kruijssen, Yotam Cohen, Allison Merritt, Jielai Zhang, Deborah, Lokhorst, Lamiya Mowla, Jean Brodie, Aaron J. Romanowsky, Steven Janssens
TL;DR
This paper presents tentative evidence for a potentially first detected cold stellar stream outside the Local Group in the ultra-diffuse galaxy NGC1052-DF2, characterized by its narrow and curved shape.
Contribution
It reports the possible discovery of a cold stellar stream in an ultra-diffuse galaxy, a first outside the Local Group, highlighting a new observational feature.
Findings
Candidate stream is very narrow and highly curved
Potential first detection of such a stream outside the Local Group
Evidence is tentative and requires confirmation
Abstract
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.
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