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The First Tidally Disrupted Ultra-faint Dwarf Galaxy?: A Spectroscopic Analysis of the Tucana III Stream

Li, Ting S; Simon, Joshua D.; Kuehn, Kyler; Pace, Andrew B; Erkal, D.; Bechtol, K; Yanny, Brian; Drlica-Wagner, Alex; Marshall, J; Lidman, Chris; Balbinot, E.


We present a spectroscopic study of the tidal tails and core of the Milky Way satellite Tucana III, collectively referred to as the Tucan III stream, using the 2dF+AAOmega spectrograph on the Anglo-Australian Telescope and the IMACS spectrograph on the Magellan Baade Telescope. In addition to recovering the brightest nine previously known member stars in the Tucana III core, we identify 22 members in the tidal tails.We observe strong evidence for a velocity gradient of 8.0 ± 0.4 km s-1 deg-1...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
Source: Astrophysical Journal, The
DOI: 10.3847/1538-4357/aadf91
Access Rights: Open Access


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