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On the Nature of Ultra-faint Dwarf Galaxy Candidates. I. DES1, Eridanus III, and Tucana V

Conn, Blair; Jerjen, Helmut; Kim, Dongwon; Schirmer, Mischa


We use deep Gemini/GMOS-S g, r photometry to study the three ultra-faint dwarf galaxy candidates DES1, Eridanus III (Eri III), and Tucana V (Tuc V). Their total luminosities, M V(DES1) = -1.42 ±0.50 and MV(Eri III) = -2.07 ±0.50, and mean metallicities, [Fe/H] = -2.38+0.21-0.19 and [Fe/H] = -2.40+0.19-0.12, are consistent with them being ultra-faint dwarf galaxies, as they fall just outside the 1σ confidence band of the luminosity-metallicity relation for Milky Way satellite galaxies. However,...[Show more]

CollectionsANU Research Publications
Date published: 2018-01-08
Type: Journal article
Source: The Astrophysical Journal
DOI: 10.3847/1538-4357/aa9eda
Access Rights: Open Access


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