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Oxford University Press, Monthly Notices of the Royal Astronomical Society, 4(430), p. 2973-2978, 2013

DOI: 10.1093/mnras/stt101

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Metallicity Bias in the Kinematics of the Milky Way Stellar Halo

Journal article published in 2012 by P. R. Kafle, S. Sharma ORCID, G. F. Lewis ORCID, J. Bland-Hawthorn
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Here we study the metallicity bias in the velocity dispersions, the derived quantity called anisotropy and the mean azimuthal velocity profiles of the Milky Way stellar halo using Blue Horizontal Branch (BHB) stars taken from SDSS/SEGUE survey. The comparatively metal-rich sample ([Fe/H]>-2) has prograde motion and is found to have an offset of 40 km/s in the mean azimuthal velocity with respect to a metal-poor sample ([Fe/H]