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Distant field blue horizontal branch stars - III. Identification of a probable outer halo stream at Galactocentric distance r = 70kpc

Clewley, Lee; Warren, S J; Hewett, Paul C; Norris, John; Wilkinson, M I; Evans, N W

Description

We present FOcal Reducer/low dispersion Spectrograph-1 spectra (from the European Southern Observatory's Very Large Telescope) of a sample of 34 faint 20.0 < g* < 21.1 A-type stars selected from the Sloan Digital Sky Survey Early Data Release, with the goal of measuring the velocity dispersion of blue horizontal branch (BHB) stars in the remote Galactic halo, R ∼ 80 kpc. We show that colour selection with 1.08 < u* - g*< 1.40 and -0.2 < g* - r* < -0.04 minimizes contamination of the sample by...[Show more]

CollectionsANU Research Publications
Date published: 2005
Type: Journal article
URI: http://hdl.handle.net/1885/81461
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1111/j.1365-2966.2005.09307.x

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