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Accurate stellar kinematics at faint magnitudes: Application to the Boötes i dwarf spheroidal galaxy

Koposov, Sergey; Gilmore, Gerard; Walker, Matthew; Belokurov, V; Wyn Evans, N; Fellhauer, M; Gieren, W; Geisler, D; Monaco, L; Norris, John; Okamoto, S; Penarrubia, J; Walker, M; Monaco, Lorenzo

Description

We develop, implement, and characterize an enhanced data reduction approach which delivers precise, accurate, radial velocities from moderate resolution spectroscopy with the fiber-fed VLT/FLAMES+GIRAFFE facility. This facility, with appropriate care, delivers radial velocities adequate to resolve the intrinsic velocity dispersions of the very faint dwarf spheroidal (dSph) galaxies. Importantly, repeated measurements let us reliably calibrate our individual velocity errors (0.2 kms-1 ≤ δV ≤...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
URI: http://hdl.handle.net/1885/70494
Source: Astrophysical Journal, The
DOI: 10.1088/0004-637X/736/2/146

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