Article open access publication

Abundances of carbon-enhanced metal-poor stars as constraints on their formation

Astronomy & Astrophysics, EDP Sciences, ISSN 0004-6361

Volume 588, 2016

DOI:10.1051/0004-6361/201526895, Dimensions: pub.1056924081,

Authors

Hansen, C. J. (1) (2)
Nordström, B. (1) (3)
Kennedy, C. R. (4) (5)
Andersen, J. (1) (3) (7)
Cescutti, G. (8) (9)

Affiliations

Organisations

  1. (1) University of Copenhagen, grid.5254.6, KU
  2. (2) Heidelberg University, grid.7700.0
  3. (3) Aarhus University, grid.7048.b, AU
  4. (4) Australian National University, grid.1001.0
  5. (5) University of Tampa, grid.267280.9
  6. (6) University of Notre Dame, grid.131063.6
  7. (7) Nordic Optical Telescope Scientific Association, grid.507243.7
  8. (8) University of Hertfordshire, grid.5846.f
  9. (9) Leibniz Institute for Astrophysics Potsdam, grid.423694.e

Description

Context. An increasing fraction of carbon-enhanced metal-poor (CEMP) stars is found as their iron abundance, [Fe/H], decreases below [Fe/H] =−2.0. The CEMP-s stars have the highest absolute carbon abundances, [C/H], and are thought to owe their enrichment in carbon and the slow neutron-capture (s-process) elements to mass transfer from a former asymptotic giant branch (AGB) binary companion. The most Fe-poor CEMP stars are normally single, exhibit somewhat lower [C/H] than CEMP-s stars, but show no s-process element enhancement (CEMP-no stars). Abundance determinations of CNO offer clues to their formation sites.

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University of Copenhagen

Aarhus University

Danish Open Access Indicator

2016: Blocked

Research area: Science & Technology

Danish Bibliometrics Indicator

2016: Level 2

Research area: Science & Technology

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Times Cited: 24

Field Citation Ratio (FCR): 7.46

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