Skip navigation
Skip navigation

A Hero's Dark Horse: Discovery of an Ultra-faint Milky Way Satellite in Pegasus

Kim, Dongwon; Jerjen, Helmut; Mackey, Dougal; Da Costa, Gary; Milone, Antonino


We report the discovery of an ultra-faint Milky Way satellite galaxy in the constellation of Pegasus. The concentration of stars was detected by applying our overdensity detection algorithm to the SDSS-DR 10 and confirmed with deeper photometry from the Dark Energy Camera at the 4 m Blanco telescope. Fitting model isochrones indicates that this object, Pegasus III, features an old and metal-poor stellar population ([Fe/H] ∼ -2.1) at a heliocentric distance of 205 ± 20 kpc. The new stellar...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
Source: Astrophysical Journal Letters
DOI: 10.1088/2041-8205/804/2/L44


File Description SizeFormat Image
01_Kim_A_Hero%27s_Dark_Horse%3A_Discovery_2015.pdf666.94 kBAdobe PDF    Request a copy

Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.

Updated:  19 May 2020/ Responsible Officer:  University Librarian/ Page Contact:  Library Systems & Web Coordinator