A Hero's Dark Horse: Discovery of an Ultra-faint Milky Way Satellite in Pegasus
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Kim, Dongwon; Jerjen, Helmut; Mackey, Dougal; Da Costa, Gary; Milone, Antonino
Description
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]
Collections | ANU Research Publications |
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Date published: | 2015 |
Type: | Journal article |
URI: | http://hdl.handle.net/1885/102600 |
Source: | Astrophysical Journal Letters |
DOI: | 10.1088/2041-8205/804/2/L44 |
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01_Kim_A_Hero%27s_Dark_Horse%3A_Discovery_2015.pdf | 666.94 kB | Adobe PDF | Request a copy |
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