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VARIABLE STARS in the FIELD of the HYDRA II ULTRA-FAINT DWARF GALAXY

Vivas, Anna Katherina; Olsen, Knut A. G.; Blum, Robert D.; Nidever, David L.; Walker, Alistair R; Martin, Nicolas F; Besla, Gurtina; Gallart, Carme; van der Marel, R P; Majewski, S; Conn, Blair

Description

We report the discovery of one RR Lyrae star in the ultra-faint satellite galaxy Hydra II based on time series photometry in the g, r and i bands obtained with the Dark Energy Camera at Cerro Tololo Inter-American Observatory, Chile. The association of the RR Lyrae star discovered here with Hydra II is clear because is located at 42″ from the center of the dwarf, well within its half-light radius of 102″. The RR Lyrae star has a mean magnitude of i= 21.30 ± 0.04 which is too faint to be a field...[Show more]

CollectionsANU Research Publications
Date published: 2016
Type: Journal article
URI: http://hdl.handle.net/1885/152026
Source: Astronomical Journal
DOI: 10.3847/004-6256/151/5/118
Access Rights: Open Access

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