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Extended stellar substructure surrounding the Boötes I dwarf spheroidal galaxy

Roderick, Tammy; Mackey, Dougal; Jerjen, Helmut; Da Costa, Gary

Description

We present deep stellar photometry of the Boötes I dwarf spheroidal galaxy in g- and i-band filters, taken with the Dark Energy Camera at Cerro Tololo in Chile. Our analysis reveals a large, extended region of stellar substructure surrounding the dwarf, as well as a distinct overdensity encroaching on its tidal radius. A radial profile of the Boötes I stellar distribution shows a break radius indicating the presence of extra-tidal stars. These observations strongly suggest that Boötes I is...[Show more]

CollectionsANU Research Publications
Date published: 2016
Type: Journal article
URI: http://hdl.handle.net/1885/152462
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/stw1541
Access Rights: Open Access

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