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Carbon-enhanced metal-poor stars in the inner and outer halo components of the Milky Way

Carollo, Daniela; Beers, Timothy C; Bovy, Jo; Sivarani, Thirupathi; Norris, John; Freeman, Kenneth; Aoki, Wako; Sun Lee, Young; Kennedy, Catherine

Description

Carbon-enhanced metal-poor (CEMP) stars in the halo components of the Milky Way are explored, based on accurate determinations of the carbon-to-iron ([C/Fe]) abundance ratios and kinematic quantities for over 30,000 calibration stars from the Sloan Digital Sky Survey. Using our present criterion that low-metallicity stars exhibiting [C/Fe] ratios ("carbonicity") in excess of [C/Fe] =+0.7 are considered CEMP stars, the global frequency of CEMP stars in the halo system for [Fe/H] <-1.5 is 8%, for...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
URI: http://hdl.handle.net/1885/60694
Source: Astrophysical Journal, The
DOI: 10.1088/0004-637X/744/2/195

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