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The Aquarius comoving group is not a disrupted classical globular cluster

Casey, Andrew; Keller, Stefan; Alves-Brito, Alan; Frebel, Anna; Da Costa, Gary; Karakas, Amanda; Yong, David; Schlaufman, Kevin; Jacobson, Heather R; Yu, Qinsi; Fishlock, Cherie


We present a detailed analysis of high-resolution, high signal-to-noise ratio spectra for five Aquarius stream stars observed with the Magellan Inamori Kyocera Echelle spectrograph on theMagellan Clay telescope. Our sample represents one-third of the 15 known members in the stream.We find the stream is not monometallic: the metallicity ranges from [Fe/H]=-0.63 to -1.58. No anticorrelation in Na-O abundances is present, and we find a strong positive Mg-Al relationship, similar to that observed...[Show more]

CollectionsANU Research Publications
Date published: 2014
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/stu1031
Access Rights: Open Access


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