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Tracing the origin of the aquarius stream. I

Wylie de Boer, Elizabeth; Freeman, Kenneth; Williams, Mary; Steinmetz, Matthias; Munari, U; Keller, Stefan

Description

We present an abundance analysis of six member stars of the recently discovered Aquarius stream, in an attempt to ascertain whether this halo stream is real and, if so, to understand its origin. The mean metallicities of the six stars have a dispersion of only 0.10 dex, indicating that they are part of a chemically coherent structure. We then investigate whether the stream represents the debris of a disrupted dwarf galaxy or a disrupted globular cluster. The [Ni/Fe]-[Na/Fe] plane provides a...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
URI: http://hdl.handle.net/1885/65461
Source: Astrophysical Journal, The
DOI: 10.1088/0004-637X/755/1/35

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