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The occurrence of nitrogen-enhanced metal-poor stars: Implications for the initial mass function in the early Galactic halo

Pols, O.R.; Izzard, R. G.; Stancliffe, Richard; Glebbeek, E.

Description

Most carbon-enhanced metal-poor (CEMP) stars are thought to result from past mass transfer of He-burning material from an asymptotic giant branch (AGB) star to a low-mass companion star, which we now observe as a CEMP star. Because AGB stars of intermediate mass efficiently cycle carbon into nitrogen in their envelopes, the same evolution scenario predicts the existence of a population of nitrogen-enhanced metal-poor (NEMP) stars, with [N/Fe] > 1 and [N/C] > 0.5. Such NEMP stars are rare,...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
URI: http://hdl.handle.net/1885/71894
Source: Astronomy and Astrophysics
DOI: 10.1051/0004-6361/201219597

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