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Stellar Substructures around the Hercules Dwarf Spheroidal Galaxy

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

Description

We present deep g and i band Dark Energy Camera stellar photometry of the Hercules Milky Way satellite galaxy, and its surrounding field, out to a radial distance of 5.4 times the tidal radius. We have identified nine extended stellar substructures associated with the dwarf; preferentially distributed along the major axis of the galaxy. Two significant over-densities lie outside the 95% confidence band for the likely orbital path of the galaxy and appear to be free-floating tidal debris. We...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
URI: http://hdl.handle.net/1885/102611
Source: Astrophysical Journal, The
DOI: 10.1088/0004-637X/804/2/134

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