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Ships Passing in the Night: Spectroscopic Analysis of Two Ultra-faint Satellites in the Constellation Carina

Li, Ting S; Simon, Joshua D.; Pace, Andrew B; Torrealba, Gabriel; Kuehn, Kyler; Drlica-Wagner, Alex; Bechtol, K; Vivas, Anna Katherina; van der Marel, R P; Wood, Matthew D; Yanny, Brian; Conn, Blair


We present Magellan/IMACS, Anglo-Australian Telescope/AAOmega+2dF, and Very Large Telescope/GIRAFFE+FLAMES spectroscopy of the Carina II (Car II) and Carina III (Car III) dwarf galaxy candidates, recently discovered in the Magellanic Satellites Survey (MagLiteS). We identify 18 member stars in Car II, including two binaries with variable radial velocities and two RR Lyrae stars. The other 14 members have a mean heliocentric velocity and a velocity dispersion of σy = 3.0-0.8 1.2km s-1. Assuming...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
Source: The Astrophysical Journal
DOI: 10.3847/1538-4357/aab666


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